matplotlib-users Mailing List for matplotlib

Am Fri, 7 Jun 2013 22:15:31 +0200
schrieb Yoshi Rokuko <yo...@ro...>:

> Fr, 7 Jun 2013 10:13:26 -0400 Michael Droettboom <md...@st...>:
> 
> > Have you tried setting ps.usedistiller to False, or xpdf?  There
> > have been problems using Ghostscript as a distiller with recent
> > versions of Ghostscript.
> 
> No, I didn't try.  Thanks for the hint, I will test that.
> 
> > We'll need a minimal example, or at least a copy of the PS file to 
> > investigate this further, however.  Also, what platform, version of 
> > matplotlib and Python are you using?
> 
> If I keep everything on my system linux with python 2.7.5 and
> matplotlib 1.2.1 it works fine.  Problems arise if I move the EPS to
> an older system or the printing.  I will have access to these
> machines on Tue.  I will try to create a minimal example then.

OK, I created a more simple example that fails. It is attached as
draw.py and the output produced by the printer is attached as a scan.
Using ps.distiller == False doesn't change the output but setting it to
'xpdf' does. The latter is also printable. Everything including the EPS
outputs is compressed in [1]. This archive includes also a file
test-opt.eps that was generated with eps2eps from the original EPS
without any ps.usedistiller options. This optimized EPS by eps2eps can
be printed too. Although sometimes bboxes get destroyed by this.

Do you need further information in order to investigate this issue?

Thank you and best regards,
Yoshi Rokuko

[1] http://rokuko.net/matplotlib-eps.tar.bz2 (23M)

Thank you very much Eric for your valuable suggestions and explanations, now I could follow what exactly was wrong with my way of doing it, I got the result correctly.
thanks a lot
with best regards,
Sudheer



----- Original Message -----
> From: Eric Firing <ef...@ha...>
> To: Sudheer Joseph <sud...@ya...>
> Cc: "mat...@li..." <mat...@li...>
> Sent: Tuesday, 11 June 2013 12:53 PM
> Subject: Re: [Matplotlib-users] time axis format
> 
> On 2013/06/10 6:16 PM, Sudheer Joseph wrote:
>> 
>> 
>>  Thank you Eric and CM,
>>  I have the below piece of code and added the new definition for minorLocs, 
> but gets the below error. I believe I did not fully understand the concept you 
> mentioned.
>> 
> 
> Try it again, please, exactly as I wrote it.
> 
>>  minorLocs = mdates.MonthLocator(bymonth=[1,3,5,7,9,11],bymonthday=15)
> 
> 
> Delete the following line:
>>  minorFmt = mdates.DateFormatter('%b')
>> 
> 
> Restore the following to what I wrote; your change to the first line is 
> wrong.
>>  class MonthLetter(minorFmt):
>>       def __init__(self):
>>           DateFormatter.__init__(self, "%b")
>>       def __call__(*args):
>>           s = DateFormatter.__call__(*args)
>>           return s[:1]
>>  minorFmt = MonthLetter()
>> 
>> 
>> 
>> 
>>       531     def viewlim_to_dt(self):
>>  --> 532         vmin, vmax = self.axis.get_view_interval()
>>       533         return num2date(vmin, self.tz), num2date(vmax, self.tz)
>>       534
>> 
>>  AttributeError: 'NoneType' object has no attribute 
> 'get_view_interva
>> 
>> 
>> 
>>  From: Eric Firing <ef...@ha...>
>> 
>>  To: mat...@li...
>>>  Sent: Tuesday, 11 June 2013 6:11 AM
>>>  Subject: Re: [Matplotlib-users] time axis format
>>> 
>>> 
>>>  On 2013/06/10 2:08 PM, Sudheer Joseph wrote:
>>>> 
>>>>  Thank you,
>>>>  So there is no way to get J F M A etc with out reducing font size? 
> We
>>>>  often need to make presentation in front of senior people who 
> insist for
>>>>  bigger fonts.
>>>>  With best regards,
>>>>  Sudheer
>>> 
>>>  One way is to subclass DateFormatter, e.g.,
>>> 
>>>  class MonthLetter(DateFormatter):
>>>        def __init__(self):
>>>            DateFormatter.__init__(self, "%b")
>>> 
>>>        def __call__(*args):
>>>            s = DateFormatter.__call__(*args)
>>>            return s[:1]
>>> 
>>>  class MonthLetterYear(DateFormatter):
>>>        def __init__(self):
>>>            DateFormatter.__init__(self, "%b\n%Y")
>>> 
>>>        def __call__(*args):
>>>            s = DateFormatter.__call__(*args)
>>>            return = s[:1] + s[3:]
>>> 
>>>  ...
>>> 
>>>  majorFmt = MonthLetterYear()
>>>  minorFmt = MonthLetter()
>>> 
>>> 
>>>  Not tested, but something like that should work.
>>> 
>>>  Eric
>>> 
>>> 
>>>> 
>>>> 
>>>> 
> ------------------------------------------------------------------------
>>>>  *From: * Paul Hobson <pmh...@gm...>;
>>>>  *To: * Sudheer Joseph <sud...@ya...>;
>>>>  *Cc: * mat...@li...
>>>>  <mat...@li...>;
>>>>  *Subject: * Re: [Matplotlib-users] time axis format
>>>>  *Sent: * Mon, Jun 10, 2013 8:08:18 PM
>>>> 
>>>>  In that case, I would use ax.tick_params(...) to make the font 
> smaller.
>>>> 
>>>> 
>>>>  On Sat, Jun 8, 2013 at 7:36 AM, Sudheer Joseph 
> <sud...@ya...
>>>>  <javascript:return>> wrote:
>>>> 
>>>>        Dear Paul,
>>>>                        The issue I am facing is like in the attached 
> plot
>>>>        where the month naming get cluttered.
>>>>        with best regards,
>>>>        Sudheer
>>>>       
> ***************************************************************
>>>>        Sudheer Joseph
>>>>        Indian National Centre for Ocean Information Services
>>>>        Ministry of Earth Sciences, Govt. of India
>>>>        POST BOX NO: 21, IDA Jeedeemetla P.O.
>>>>        Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
>>>>        Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
>>>>        Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
>>>>        E-mail:sjo...@gm...
>>>>        <javascript:return>;sud...@ya... 
> <javascript:return>
>>>>        Web- http://oppamthadathil.tripod.com
>>>>       
> ***************************************************************
>>>> 
>>>>           
> ------------------------------------------------------------------------
>>>>            *From:* Sudheer Joseph <sud...@ya...
>>>>            <javascript:return>>
>>>>            *To:* Paul Hobson <pmh...@gm... 
> <javascript:return>>
>>>>            *Cc:* "mat...@li...
>>>>            <javascript:return>" 
> <mat...@li...
>>>>            <javascript:return>>
>>>>            *Sent:* Saturday, 8 June 2013 7:46 PM
>>>> 
>>>>            *Subject:* Re: [Matplotlib-users] time axis format
>>>> 
>>>>            Thank you Paul for the helping hand,
>>>>                                               However I was looking 
> for
>>>>            slightly different solution like in the attached plots. I 
> used
>>>>            ferret to do this based on the length of the time axis it 
> chose
>>>>            the mode of labelling. for example in case of 2 year plot 
> it
>>>>            made month labeling as j f m etc and in case of 1 year as 
> there
>>>>            is enough space on x axis it made jan feb etc with single 
> label
>>>>            of year.
>>>> 
>>>>            In the attached python plot 
> (ATser_RAMA_HYCOM_U_8n90e.png) every
>>>>            tick point is lablled for year, which I wanted to avoid 
> and get
>>>>            plots similar to the first types thought it is not done
>>>>            automatically but at least manually.
>>>> 
>>>> 
>>>>           
> ***************************************************************
>>>>            Sudheer Joseph
>>>>            Indian National Centre for Ocean Information Services
>>>>            Ministry of Earth Sciences, Govt. of India
>>>>            POST BOX NO: 21, IDA Jeedeemetla P.O.
>>>>            Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
>>>>            Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
>>>>            Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
>>>>            E-mail:sjo...@gm...
>>>>            <javascript:return>;sud...@ya... 
> <javascript:return>
>>>>            Web- http://oppamthadathil.tripod.com
>>>>           
> ***************************************************************
>>>> 
>>>>               
> ------------------------------------------------------------------------
>>>>                *From:* Paul Hobson <pmh...@gm... 
> <javascript:return>>
>>>>                *To:* Sudheer Joseph <sud...@ya...
>>>>                <javascript:return>>
>>>>                *Cc:* "mat...@li...
>>>>                <javascript:return>" 
> <mat...@li...
>>>>                <javascript:return>>
>>>>                *Sent:* Friday, 7 June 2013 8:50 PM
>>>>                *Subject:* Re: [Matplotlib-users] time axis format
>>>> 
>>>> 
>>>> 
>>>> 
>>>>                On Thu, Jun 6, 2013 at 11:39 PM, Sudheer Joseph
>>>>                <sud...@ya... 
> <javascript:return>> wrote:
>>>> 
>>>>                    Dear Experts,
>>>>                                 I have been experimenting with the
>>>>                    plot_dates option of matplotlib to plot time 
> series data
>>>>                    and have below questions
>>>> 
>>>>                      I have used
>>>>                    loc = mdates.AutoDateLocator()
>>>>                    ax.xaxis.set_major_locator(loc)
>>>>                   
> ax.xaxis.set_major_formatter(mpl.dates.DateFormatter('%b\n
>>>>                    %Y'))
>>>> 
>>>> 
>>>>                    and got the tick labels in attached plot
>>>> 
>>>>                    However I feel the repeatd year labeling is not 
> needed
>>>>                    here and it is required once in a year only , 
> Also if I
>>>>                    need to plot long time seris insted of 
> "MAR" "APR" I
>>>>                    wanted to get them reduced to "M" 
> "A" etc so that the
>>>>                    lavel congestion can be avoided.
>>>> 
>>>> 
>>>>                    I notice that below options are available, but 
> was
>>>>                    wondering how commbinatins of these locateors are 
> used
>>>>                    ie mark every month and every year once each.
>>>> 
>>>> 
>>>>                    Is there a way to achive the above or does it 
> need
>>>>                    further development?
>>>> 
>>>>                    fmt = mdates.DateFormatter('%Y-%m-%d')
>>>>                    loc =
>>>>                   
> mdates.WeekdayLocator(byweekday=mdates.MONDAY,interval=4)
>>>>                    locator = mdates.YearLocator()
>>>> 
>>>> 
>>>>                If I were trying to do this, I'd cobble something 
> together
>>>>                using by the minor and major formatters.
>>>>                e.g.,...
>>>>                import matplotlib.dates as mdates
>>>>                import matplotlib.pyplot as plt
>>>> 
>>>>                fig, ax = plt.subplots()
>>>> 
>>>>                majorLocs = mdates.MonthLocator(bymonth[1,7])
>>>>                majorFmt = mdates.DateFormatter('%b\n%Y')
>>>> 
>>>>                minorLocs = mdates.MonthLocator(bymonth[1,7])
>>>>                minorFmt = mdates.DateFormatter('%b')
>>>> 
>>>>                ax.xaxis.set_major_locator(majorLocs)
>>>>                ax.xaxis.set_major_formatter(majorFmt)
>>>> 
>>>>                ax.xaxis.set_minor_locator(minorLocs)
>>>>                ax.xaxis.set_minor_formatter(minorFmt)
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
> ------------------------------------------------------------------------------
>>>>  This SF.net email is sponsored by Windows:
>>>> 
>>>>  Build for Windows Store.
>>>> 
>>>>  http://p.sf.net/sfu/windows-dev2dev
>>>> 
>>>> 
>>>> 
>>>>  _______________________________________________
>>>>  Matplotlib-users mailing list
>>>>  Mat...@li...
>>>>  https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>>> 
>>> 
>>> 
>>> 
> ------------------------------------------------------------------------------
>>>  This SF.net email is sponsored by Windows:
>>> 
>>>  Build for Windows Store.
>>> 
>>>  http://p.sf.net/sfu/windows-dev2dev
>>>  _______________________________________________
>>>  Matplotlib-users mailing list
>>>  Mat...@li...
>>>  https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>> 
>>> 
>>> 
> 

On 2013/06/10 6:16 PM, Sudheer Joseph wrote:
>
>
> Thank you Eric and CM,
> I have the below piece of code and added the new definition for minorLocs, but gets the below error. I believe I did not fully understand the concept you mentioned.
>

Try it again, please, exactly as I wrote it.

> minorLocs = mdates.MonthLocator(bymonth=[1,3,5,7,9,11],bymonthday=15)


Delete the following line:
> minorFmt = mdates.DateFormatter('%b')
>

Restore the following to what I wrote; your change to the first line is 
wrong.
> class MonthLetter(minorFmt):
>      def __init__(self):
>          DateFormatter.__init__(self, "%b")
>      def __call__(*args):
>          s = DateFormatter.__call__(*args)
>          return s[:1]
> minorFmt = MonthLetter()
>
>
>
>
>      531     def viewlim_to_dt(self):
> --> 532         vmin, vmax = self.axis.get_view_interval()
>      533         return num2date(vmin, self.tz), num2date(vmax, self.tz)
>      534
>
> AttributeError: 'NoneType' object has no attribute 'get_view_interva
>
>
>
> From: Eric Firing <ef...@ha...>
>
> To: mat...@li...
>> Sent: Tuesday, 11 June 2013 6:11 AM
>> Subject: Re: [Matplotlib-users] time axis format
>>
>>
>> On 2013/06/10 2:08 PM, Sudheer Joseph wrote:
>>>
>>> Thank you,
>>> So there is no way to get J F M A etc with out reducing font size? We
>>> often need to make presentation in front of senior people who insist for
>>> bigger fonts.
>>> With best regards,
>>> Sudheer
>>
>> One way is to subclass DateFormatter, e.g.,
>>
>> class MonthLetter(DateFormatter):
>>       def __init__(self):
>>           DateFormatter.__init__(self, "%b")
>>
>>       def __call__(*args):
>>           s = DateFormatter.__call__(*args)
>>           return s[:1]
>>
>> class MonthLetterYear(DateFormatter):
>>       def __init__(self):
>>           DateFormatter.__init__(self, "%b\n%Y")
>>
>>       def __call__(*args):
>>           s = DateFormatter.__call__(*args)
>>           return = s[:1] + s[3:]
>>
>> ...
>>
>> majorFmt = MonthLetterYear()
>> minorFmt = MonthLetter()
>>
>>
>> Not tested, but something like that should work.
>>
>> Eric
>>
>>
>>>
>>>
>>> ------------------------------------------------------------------------
>>> *From: * Paul Hobson <pmh...@gm...>;
>>> *To: * Sudheer Joseph <sud...@ya...>;
>>> *Cc: * mat...@li...
>>> <mat...@li...>;
>>> *Subject: * Re: [Matplotlib-users] time axis format
>>> *Sent: * Mon, Jun 10, 2013 8:08:18 PM
>>>
>>> In that case, I would use ax.tick_params(...) to make the font smaller.
>>>
>>>
>>> On Sat, Jun 8, 2013 at 7:36 AM, Sudheer Joseph <sud...@ya...
>>> <javascript:return>> wrote:
>>>
>>>       Dear Paul,
>>>                       The issue I am facing is like in the attached plot
>>>       where the month naming get cluttered.
>>>       with best regards,
>>>       Sudheer
>>>       ***************************************************************
>>>       Sudheer Joseph
>>>       Indian National Centre for Ocean Information Services
>>>       Ministry of Earth Sciences, Govt. of India
>>>       POST BOX NO: 21, IDA Jeedeemetla P.O.
>>>       Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
>>>       Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
>>>       Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
>>>       E-mail:sjo...@gm...
>>>       <javascript:return>;sud...@ya... <javascript:return>
>>>       Web- http://oppamthadathil.tripod.com
>>>       ***************************************************************
>>>
>>>           ------------------------------------------------------------------------
>>>           *From:* Sudheer Joseph <sud...@ya...
>>>           <javascript:return>>
>>>           *To:* Paul Hobson <pmh...@gm... <javascript:return>>
>>>           *Cc:* "mat...@li...
>>>           <javascript:return>" <mat...@li...
>>>           <javascript:return>>
>>>           *Sent:* Saturday, 8 June 2013 7:46 PM
>>>
>>>           *Subject:* Re: [Matplotlib-users] time axis format
>>>
>>>           Thank you Paul for the helping hand,
>>>                                              However I was looking for
>>>           slightly different solution like in the attached plots. I used
>>>           ferret to do this based on the length of the time axis it chose
>>>           the mode of labelling. for example in case of 2 year plot it
>>>           made month labeling as j f m etc and in case of 1 year as there
>>>           is enough space on x axis it made jan feb etc with single label
>>>           of year.
>>>
>>>           In the attached python plot (ATser_RAMA_HYCOM_U_8n90e.png) every
>>>           tick point is lablled for year, which I wanted to avoid and get
>>>           plots similar to the first types thought it is not done
>>>           automatically but at least manually.
>>>
>>>
>>>           ***************************************************************
>>>           Sudheer Joseph
>>>           Indian National Centre for Ocean Information Services
>>>           Ministry of Earth Sciences, Govt. of India
>>>           POST BOX NO: 21, IDA Jeedeemetla P.O.
>>>           Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
>>>           Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
>>>           Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
>>>           E-mail:sjo...@gm...
>>>           <javascript:return>;sud...@ya... <javascript:return>
>>>           Web- http://oppamthadathil.tripod.com
>>>           ***************************************************************
>>>
>>>               ------------------------------------------------------------------------
>>>               *From:* Paul Hobson <pmh...@gm... <javascript:return>>
>>>               *To:* Sudheer Joseph <sud...@ya...
>>>               <javascript:return>>
>>>               *Cc:* "mat...@li...
>>>               <javascript:return>" <mat...@li...
>>>               <javascript:return>>
>>>               *Sent:* Friday, 7 June 2013 8:50 PM
>>>               *Subject:* Re: [Matplotlib-users] time axis format
>>>
>>>
>>>
>>>
>>>               On Thu, Jun 6, 2013 at 11:39 PM, Sudheer Joseph
>>>               <sud...@ya... <javascript:return>> wrote:
>>>
>>>                   Dear Experts,
>>>                                I have been experimenting with the
>>>                   plot_dates option of matplotlib to plot time series data
>>>                   and have below questions
>>>
>>>                     I have used
>>>                   loc = mdates.AutoDateLocator()
>>>                   ax.xaxis.set_major_locator(loc)
>>>                   ax.xaxis.set_major_formatter(mpl.dates.DateFormatter('%b\n
>>>                   %Y'))
>>>
>>>
>>>                   and got the tick labels in attached plot
>>>
>>>                   However I feel the repeatd year labeling is not needed
>>>                   here and it is required once in a year only , Also if I
>>>                   need to plot long time seris insted of "MAR" "APR" I
>>>                   wanted to get them reduced to "M" "A" etc so that the
>>>                   lavel congestion can be avoided.
>>>
>>>
>>>                   I notice that below options are available, but was
>>>                   wondering how commbinatins of these locateors are used
>>>                   ie mark every month and every year once each.
>>>
>>>
>>>                   Is there a way to achive the above or does it need
>>>                   further development?
>>>
>>>                   fmt = mdates.DateFormatter('%Y-%m-%d')
>>>                   loc =
>>>                   mdates.WeekdayLocator(byweekday=mdates.MONDAY,interval=4)
>>>                   locator = mdates.YearLocator()
>>>
>>>
>>>               If I were trying to do this, I'd cobble something together
>>>               using by the minor and major formatters.
>>>               e.g.,...
>>>               import matplotlib.dates as mdates
>>>               import matplotlib.pyplot as plt
>>>
>>>               fig, ax = plt.subplots()
>>>
>>>               majorLocs = mdates.MonthLocator(bymonth[1,7])
>>>               majorFmt = mdates.DateFormatter('%b\n%Y')
>>>
>>>               minorLocs = mdates.MonthLocator(bymonth[1,7])
>>>               minorFmt = mdates.DateFormatter('%b')
>>>
>>>               ax.xaxis.set_major_locator(majorLocs)
>>>               ax.xaxis.set_major_formatter(majorFmt)
>>>
>>>               ax.xaxis.set_minor_locator(minorLocs)
>>>               ax.xaxis.set_minor_formatter(minorFmt)
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> This SF.net email is sponsored by Windows:
>>>
>>> Build for Windows Store.
>>>
>>> http://p.sf.net/sfu/windows-dev2dev
>>>
>>>
>>>
>>> _______________________________________________
>>> Matplotlib-users mailing list
>>> Mat...@li...
>>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>>
>>
>>
>> ------------------------------------------------------------------------------
>> This SF.net email is sponsored by Windows:
>>
>> Build for Windows Store.
>>
>> http://p.sf.net/sfu/windows-dev2dev
>> _______________________________________________
>> Matplotlib-users mailing list
>> Mat...@li...
>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>
>>
>>

On 2013/06/10 6:16 PM, Sudheer Joseph wrote:
> Thank you Eric and CM,
> I have the below piece of code and added the new definition for minorLocs, but gets the below error. I believe I did not fully understand the concept you mentioned.
>

The concept is "subclassing": writing a class that "inherits" most of 
its behavior from another class, while modifying some aspects.

> minorLocs = mdates.MonthLocator(bymonth=[1,3,5,7,9,11],bymonthday=15)
> minorFmt = mdates.DateFormatter('%b')
>

The problem with your change to the following is that MonthLetter should 
be subclassing DateFormatter, as I had it.  With your change it is 
trying to subclass an instance of DateFormatter, not the class itself.

> class MonthLetter(minorFmt):
>      def __init__(self):
>          DateFormatter.__init__(self, "%b")
>      def __call__(*args):
>          s = DateFormatter.__call__(*args)
>          return s[:1]
> minorFmt = MonthLetter()

In the context of your usage, the one change you do need to make to the 
way I wrote the subclasses is to change my "DateFormatter" to 
"mdates.DateFormatter", since you are importing mdates rather than doing

from matplotlib.dates import DateFormatter

(Or, you can add the above import line to your block of imports.)

Eric

Got a solution as below

p.setp(ax.xaxis.get_minorticklabels(), rotation=90 )
but still to understand how to get single letter from month name!

with best regards,
Sudheer




----- Original Message -----
> From: Sudheer Joseph <sud...@ya...>
> To: Eric Firing <ef...@ha...>; "mat...@li..." <mat...@li...>
> Cc: 
> Sent: Tuesday, 11 June 2013 9:46 AM
> Subject: Re: [Matplotlib-users] time axis format
> 
> 
> 
> Thank you Eric and CM,
> I have the below piece of code and added the new definition for minorLocs, but 
> gets the below error. I believe I did not fully understand the concept you 
> mentioned. 
> 
> minorLocs = mdates.MonthLocator(bymonth=[1,3,5,7,9,11],bymonthday=15)
> minorFmt = mdates.DateFormatter('%b')
> 
> class MonthLetter(minorFmt):
>     def __init__(self):
>         DateFormatter.__init__(self, "%b")
>     def __call__(*args):
>         s = DateFormatter.__call__(*args)
>         return s[:1]
> minorFmt = MonthLetter()
> 
> 
> 
> 
>     531     def viewlim_to_dt(self):
> --> 532         vmin, vmax = self.axis.get_view_interval()
>     533         return num2date(vmin, self.tz), num2date(vmax, self.tz)
>     534 
> 
> AttributeError: 'NoneType' object has no attribute 'get_view_interva
> 
> 
> 
> From: Eric Firing <ef...@ha...>
> 
> To: mat...@li... 
>> Sent: Tuesday, 11 June 2013 6:11 AM
>> Subject: Re: [Matplotlib-users] time axis format
>> 
>> 
>> On 2013/06/10 2:08 PM, Sudheer Joseph wrote:
>>> 
>>>  Thank you,
>>>  So there is no way to get J F M A etc with out reducing font size? We
>>>  often need to make presentation in front of senior people who insist 
> for
>>>  bigger fonts.
>>>  With best regards,
>>>  Sudheer
>> 
>> One way is to subclass DateFormatter, e.g.,
>> 
>> class MonthLetter(DateFormatter):
>>      def __init__(self):
>>          DateFormatter.__init__(self, "%b")
>> 
>>      def __call__(*args):
>>          s = DateFormatter.__call__(*args)
>>          return s[:1]
>> 
>> class MonthLetterYear(DateFormatter):
>>      def __init__(self):
>>          DateFormatter.__init__(self, "%b\n%Y")
>> 
>>      def __call__(*args):
>>          s = DateFormatter.__call__(*args)
>>          return = s[:1] + s[3:]
>> 
>> ...
>> 
>> majorFmt = MonthLetterYear()
>> minorFmt = MonthLetter()
>> 
>> 
>> Not tested, but something like that should work.
>> 
>> Eric
>> 
>> 
>>> 
>>> 
>>> 
> ------------------------------------------------------------------------
>>>  *From: * Paul Hobson <pmh...@gm...>;
>>>  *To: * Sudheer Joseph <sud...@ya...>;
>>>  *Cc: * mat...@li...
>>>  <mat...@li...>;
>>>  *Subject: * Re: [Matplotlib-users] time axis format
>>>  *Sent: * Mon, Jun 10, 2013 8:08:18 PM
>>> 
>>>  In that case, I would use ax.tick_params(...) to make the font smaller.
>>> 
>>> 
>>>  On Sat, Jun 8, 2013 at 7:36 AM, Sudheer Joseph 
> <sud...@ya...
>>>  <javascript:return>> wrote:
>>> 
>>>      Dear Paul,
>>>                      The issue I am facing is like in the attached plot
>>>      where the month naming get cluttered.
>>>      with best regards,
>>>      Sudheer
>>>      ***************************************************************
>>>      Sudheer Joseph
>>>      Indian National Centre for Ocean Information Services
>>>      Ministry of Earth Sciences, Govt. of India
>>>      POST BOX NO: 21, IDA Jeedeemetla P.O.
>>>      Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
>>>      Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
>>>      Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
>>>      E-mail:sjo...@gm...
>>>      <javascript:return>;sud...@ya... 
> <javascript:return>
>>>      Web- http://oppamthadathil.tripod.com
>>>      ***************************************************************
>>> 
>>>       
>    ------------------------------------------------------------------------
>>>          *From:* Sudheer Joseph <sud...@ya...
>>>          <javascript:return>>
>>>          *To:* Paul Hobson <pmh...@gm... 
> <javascript:return>>
>>>          *Cc:* "mat...@li...
>>>          <javascript:return>" 
> <mat...@li...
>>>          <javascript:return>>
>>>          *Sent:* Saturday, 8 June 2013 7:46 PM
>>> 
>>>          *Subject:* Re: [Matplotlib-users] time axis format
>>> 
>>>          Thank you Paul for the helping hand,
>>>                                             However I was looking for
>>>          slightly different solution like in the attached plots. I used
>>>          ferret to do this based on the length of the time axis it chose
>>>          the mode of labelling. for example in case of 2 year plot it
>>>          made month labeling as j f m etc and in case of 1 year as there
>>>          is enough space on x axis it made jan feb etc with single label
>>>          of year.
>>> 
>>>          In the attached python plot (ATser_RAMA_HYCOM_U_8n90e.png) 
> every
>>>          tick point is lablled for year, which I wanted to avoid and get
>>>          plots similar to the first types thought it is not done
>>>          automatically but at least manually.
>>> 
>>> 
>>>          ***************************************************************
>>>          Sudheer Joseph
>>>          Indian National Centre for Ocean Information Services
>>>          Ministry of Earth Sciences, Govt. of India
>>>          POST BOX NO: 21, IDA Jeedeemetla P.O.
>>>          Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
>>>          Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
>>>          Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
>>>          E-mail:sjo...@gm...
>>>          <javascript:return>;sud...@ya... 
> <javascript:return>
>>>          Web- http://oppamthadathil.tripod.com
>>>          ***************************************************************
>>> 
>>>           
>    ------------------------------------------------------------------------
>>>              *From:* Paul Hobson <pmh...@gm... 
> <javascript:return>>
>>>              *To:* Sudheer Joseph <sud...@ya...
>>>              <javascript:return>>
>>>              *Cc:* "mat...@li...
>>>              <javascript:return>" 
> <mat...@li...
>>>              <javascript:return>>
>>>              *Sent:* Friday, 7 June 2013 8:50 PM
>>>              *Subject:* Re: [Matplotlib-users] time axis format
>>> 
>>> 
>>> 
>>> 
>>>              On Thu, Jun 6, 2013 at 11:39 PM, Sudheer Joseph
>>>              <sud...@ya... <javascript:return>> 
> wrote:
>>> 
>>>                  Dear Experts,
>>>                               I have been experimenting with the
>>>                  plot_dates option of matplotlib to plot time series 
> data
>>>                  and have below questions
>>> 
>>>                    I have used
>>>                  loc = mdates.AutoDateLocator()
>>>                  ax.xaxis.set_major_locator(loc)
>>>               
>    ax.xaxis.set_major_formatter(mpl.dates.DateFormatter('%b\n
>>>                  %Y'))
>>> 
>>> 
>>>                  and got the tick labels in attached plot
>>> 
>>>                  However I feel the repeatd year labeling is not needed
>>>                  here and it is required once in a year only , Also if I
>>>                  need to plot long time seris insted of "MAR" 
> "APR" I
>>>                  wanted to get them reduced to "M" 
> "A" etc so that the
>>>                  lavel congestion can be avoided.
>>> 
>>> 
>>>                  I notice that below options are available, but was
>>>                  wondering how commbinatins of these locateors are used
>>>                  ie mark every month and every year once each.
>>> 
>>> 
>>>                  Is there a way to achive the above or does it need
>>>                  further development?
>>> 
>>>                  fmt = mdates.DateFormatter('%Y-%m-%d')
>>>                  loc =
>>>               
>    mdates.WeekdayLocator(byweekday=mdates.MONDAY,interval=4)
>>>                  locator = mdates.YearLocator()
>>> 
>>> 
>>>              If I were trying to do this, I'd cobble something 
> together
>>>              using by the minor and major formatters.
>>>              e.g.,...
>>>              import matplotlib.dates as mdates
>>>              import matplotlib.pyplot as plt
>>> 
>>>              fig, ax = plt.subplots()
>>> 
>>>              majorLocs = mdates.MonthLocator(bymonth[1,7])
>>>              majorFmt = mdates.DateFormatter('%b\n%Y')
>>> 
>>>              minorLocs = mdates.MonthLocator(bymonth[1,7])
>>>              minorFmt = mdates.DateFormatter('%b')
>>> 
>>>              ax.xaxis.set_major_locator(majorLocs)
>>>              ax.xaxis.set_major_formatter(majorFmt)
>>> 
>>>              ax.xaxis.set_minor_locator(minorLocs)
>>>              ax.xaxis.set_minor_formatter(minorFmt)
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
> ------------------------------------------------------------------------------
>>>  This SF.net email is sponsored by Windows:
>>> 
>>>  Build for Windows Store.
>>> 
>>>  http://p.sf.net/sfu/windows-dev2dev
>>> 
>>> 
>>> 
>>>  _______________________________________________
>>>  Matplotlib-users mailing list
>>>  Mat...@li...
>>>  https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>> 
>> 
>> 
>> ------------------------------------------------------------------------------
>> This SF.net email is sponsored by Windows:
>> 
>> Build for Windows Store.
>> 
>> http://p.sf.net/sfu/windows-dev2dev
>> _______________________________________________
>> Matplotlib-users mailing list
>> Mat...@li...
>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>> 
>> 
>> 
> 
> ------------------------------------------------------------------------------
> This SF.net email is sponsored by Windows:
> 
> Build for Windows Store.
> 
> http://p.sf.net/sfu/windows-dev2dev
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
> 

Thank you CM,
                  I tried to rotate the labels but only major ticks get rotated and when I try with minor ticks as below I get error

minlabels = ax.xaxis.get_minor_ticks()
p.xticks(minlabels,rotation=90)



--> 192     base =  float(dt.toordinal())
    193     if hasattr(dt, 'hour'):
    194         base += (dt.hour/HOURS_PER_DAY + dt.minute/MINUTES_PER_DAY +

AttributeError: 'XTick' object has no attribute 'toordinal'

From: C M <cmp...@gm...>

To: mat...@li... 
>Sent: Tuesday, 11 June 2013 6:41 AM
>Subject: Re: [Matplotlib-users] time axis format
> 
>
>
>
>
>
>On Mon, Jun 10, 2013 at 8:08 PM, Sudheer Joseph <sud...@ya...> wrote:
>
>
>>Thank you,
>>So there is no way to get J F M A etc with out reducing font size?  
>
>I bet there a number of ways.  Offhand I don't know the one that, once I hear about it, I will say, "D'oh, that's so easy" but I bet it exists.  But you could modify the DateFormatter class.  It is set to return a strftime result string.  Here is the function:
>
>def __call__(self, x, pos=0):
>        if x==0:
>            raise ValueError('DateFormatter found a value of x=0, which is an illegal date.  This usually occurs because you have not informed the axis that it is plotting dates, eg with ax.xaxis_date()')
>        dt = num2date(x, self.tz)
>        return self.strftime(dt, self.fmt)
>
>All you would have to do is change that last line to:
>
>        return self.strftime(dt, self.fmt)[0]
>
>To slice just the first letter of the month.
>
>So you could subclass DateFormatter to do this, since you probably don't want to modify the actual DateFormatter class always in this way.
>
>Also, aside from the J F M A approach, you could just rotate the month's name, and that will reduce crowding while keeping the month a little clearer (I think "JAN FEB MAR APR" is more intuitive and pleasant to read on a graph).
>
>Che
>
>
> 
>We often need to make presentation in front of senior people who insist for bigger fonts.
>>With best regards,
>>Sudheer 
>>
>>
>>
>>________________________________
>> From:  Paul Hobson <pmh...@gm...>; 
>>To:  Sudheer Joseph <sud...@ya...>; 
>>Cc:  mat...@li... <mat...@li...>; 
>>
>>Subject:  Re: [Matplotlib-users] time axis format 
>>Sent:  Mon, Jun 10, 2013 8:08:18 PM 
>>
>>
>>
>>In that case, I would use ax.tick_params(...) to make the font smaller.
>>
>>
>>
>>On Sat, Jun 8, 2013 at 7:36 AM, Sudheer Joseph <sud...@ya...> wrote:
>>
>>Dear Paul,
>>>               The issue I am facing is like in the attached plot where the month naming get cluttered.
>>>with best regards,
>>>Sudheer
>>>
>>> 
>>>***************************************************************
>>>Sudheer Joseph 
>>>Indian National Centre for Ocean Information Services
>>>Ministry of Earth Sciences, Govt. of India
>>>POST BOX NO: 21, IDA Jeedeemetla P.O.
>>>Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
>>>Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
>>>Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
>>>E-mail:sjo...@gm...;sud...@ya...
>>>Web- http://oppamthadathil.tripod.com
>>>***************************************************************
>>>
>>>
>>>>________________________________
>>>> From: Sudheer Joseph <sud...@ya...>
>>>>To: Paul Hobson <pmh...@gm...> 
>>>>Cc: "mat...@li..." <mat...@li...> 
>>>>Sent: Saturday, 8 June 2013 7:46 PM
>>>>
>>>>Subject: Re: [Matplotlib-users] time axis format
>>>> 
>>>>
>>>>
>>>>Thank you Paul for the helping hand,
>>>>                                  However I was looking for slightly different solution like in the attached plots. I used ferret to do this based on the length of the time axis it chose the mode of labelling. for example in case of 2 year plot it made month labeling as j f m etc and in case of 1 year as there is enough space on x axis it made jan feb etc with single label of year. 
>>>>
>>>>In the attached python plot (ATser_RAMA_HYCOM_U_8n90e.png) every tick point is lablled for year, which I wanted to avoid and get plots similar to the first types thought it is not done automatically but at least
manually.
>>>>
>>>>
>>>>
>>>>
>>>> 
>>>>***************************************************************
>>>>Sudheer Joseph 
>>>>Indian National Centre for Ocean Information Services
>>>>Ministry of Earth Sciences, Govt. of India
>>>>POST BOX NO: 21, IDA Jeedeemetla P.O.
>>>>Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
>>>>Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
>>>>Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
>>>>E-mail:sjo...@gm...;sud...@ya...
>>>>Web- http://oppamthadathil.tripod.com
>>>>***************************************************************
>>>>
>>>>
>>>>>________________________________
>>>>> From: Paul Hobson <pmh...@gm...>
>>>>>To: Sudheer Joseph <sud...@ya...> 
>>>>>Cc: "mat...@li..." <mat...@li...> 
>>>>>Sent: Friday, 7 June 2013 8:50 PM
>>>>>Subject: Re: [Matplotlib-users] time axis format
>>>>> 
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>On Thu, Jun 6, 2013 at 11:39 PM, Sudheer Joseph <sud...@ya...> wrote:
>>>>>
>>>>>Dear Experts,
>>>>>>            I have been experimenting with the plot_dates option of matplotlib to plot time series data and have below questions
>>>>>>
>>>>>> I have used
>>>>>>loc = mdates.AutoDateLocator()
>>>>>>ax.xaxis.set_major_locator(loc)
>>>>>>ax.xaxis.set_major_formatter(mpl.dates.DateFormatter('%b\n %Y'))
>>>>>>
>>>>>>
>>>>>>and got the tick labels in attached plot
>>>>>>
>>>>>>However I feel the repeatd year labeling is not needed here and it is required once in a year only , Also if I need to plot long time seris insted of "MAR" "APR" I wanted to get them reduced to "M" "A" etc so that the lavel congestion can be avoided.
>>>>>>
>>>>>>
>>>>>>I notice that below options are available, but was wondering how commbinatins of these locateors are used ie mark every month and every year once each.
>>>>>>
>>>>>>
>>>>>>Is there a way to achive the above or does it need further development?
>>>>>>
>>>>>>fmt = mdates.DateFormatter('%Y-%m-%d')
>>>>>>loc = mdates.WeekdayLocator(byweekday=mdates.MONDAY,interval=4)
>>>>>>locator = mdates.YearLocator()
>>>>>>
>>>>>
>>>>>
>>>>>If I were trying to do this, I'd cobble something together using by the minor and major formatters.
>>>>>e.g.,...
>>>>>import matplotlib.dates as mdates
>>>>>import matplotlib.pyplot as plt
>>>>>
>>>>>
>>>>>fig, ax = plt.subplots()
>>>>>
>>>>>
>>>>>majorLocs = mdates.MonthLocator(bymonth[1,7])
>>>>>majorFmt = mdates.DateFormatter('%b\n%Y')
>>>>>
>>>>>
>>>>>
>>>>>minorLocs = mdates.MonthLocator(bymonth[1,7])
>>>>>minorFmt = mdates.DateFormatter('%b')
>>>>>
>>>>>
>>>>>
>>>>>ax.xaxis.set_major_locator(majorLocs)
>>>>>ax.xaxis.set_major_formatter(majorFmt)
>>>>>
>>>>>
>>>>>
>>>>>ax.xaxis.set_minor_locator(minorLocs)
>>>>>ax.xaxis.set_minor_formatter(minorFmt)
>>>>>
>>>>>
>>>>
>>>>
>> 
>>------------------------------------------------------------------------------
>>This SF.net email is sponsored by Windows:
>>
>>Build for Windows Store.
>>
>>http://p.sf.net/sfu/windows-dev2dev
>>_______________________________________________
>>Matplotlib-users mailing list
>>Mat...@li...
>>https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>
>>
>
>------------------------------------------------------------------------------
>This SF.net email is sponsored by Windows:
>
>Build for Windows Store.
>
>http://p.sf.net/sfu/windows-dev2dev
>_______________________________________________
>Matplotlib-users mailing list
>Mat...@li...
>https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
>
>

Thank you Eric and CM,
I have the below piece of code and added the new definition for minorLocs, but gets the below error. I believe I did not fully understand the concept you mentioned. 

minorLocs = mdates.MonthLocator(bymonth=[1,3,5,7,9,11],bymonthday=15)
minorFmt = mdates.DateFormatter('%b')

class MonthLetter(minorFmt):
    def __init__(self):
        DateFormatter.__init__(self, "%b")
    def __call__(*args):
        s = DateFormatter.__call__(*args)
        return s[:1]
minorFmt = MonthLetter()




    531     def viewlim_to_dt(self):
--> 532         vmin, vmax = self.axis.get_view_interval()
    533         return num2date(vmin, self.tz), num2date(vmax, self.tz)
    534 

AttributeError: 'NoneType' object has no attribute 'get_view_interva



From: Eric Firing <ef...@ha...>

To: mat...@li... 
>Sent: Tuesday, 11 June 2013 6:11 AM
>Subject: Re: [Matplotlib-users] time axis format
> 
>
>On 2013/06/10 2:08 PM, Sudheer Joseph wrote:
>>
>> Thank you,
>> So there is no way to get J F M A etc with out reducing font size? We
>> often need to make presentation in front of senior people who insist for
>> bigger fonts.
>> With best regards,
>> Sudheer
>
>One way is to subclass DateFormatter, e.g.,
>
>class MonthLetter(DateFormatter):
>     def __init__(self):
>         DateFormatter.__init__(self, "%b")
>
>     def __call__(*args):
>         s = DateFormatter.__call__(*args)
>         return s[:1]
>
>class MonthLetterYear(DateFormatter):
>     def __init__(self):
>         DateFormatter.__init__(self, "%b\n%Y")
>
>     def __call__(*args):
>         s = DateFormatter.__call__(*args)
>         return = s[:1] + s[3:]
>
>...
>
>majorFmt = MonthLetterYear()
>minorFmt = MonthLetter()
>
>
>Not tested, but something like that should work.
>
>Eric
>
>
>>
>>
>> ------------------------------------------------------------------------
>> *From: * Paul Hobson <pmh...@gm...>;
>> *To: * Sudheer Joseph <sud...@ya...>;
>> *Cc: * mat...@li...
>> <mat...@li...>;
>> *Subject: * Re: [Matplotlib-users] time axis format
>> *Sent: * Mon, Jun 10, 2013 8:08:18 PM
>>
>> In that case, I would use ax.tick_params(...) to make the font smaller.
>>
>>
>> On Sat, Jun 8, 2013 at 7:36 AM, Sudheer Joseph <sud...@ya...
>> <javascript:return>> wrote:
>>
>>     Dear Paul,
>>                     The issue I am facing is like in the attached plot
>>     where the month naming get cluttered.
>>     with best regards,
>>     Sudheer
>>     ***************************************************************
>>     Sudheer Joseph
>>     Indian National Centre for Ocean Information Services
>>     Ministry of Earth Sciences, Govt. of India
>>     POST BOX NO: 21, IDA Jeedeemetla P.O.
>>     Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
>>     Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
>>     Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
>>     E-mail:sjo...@gm...
>>     <javascript:return>;sud...@ya... <javascript:return>
>>     Web- http://oppamthadathil.tripod.com
>>     ***************************************************************
>>
>>         ------------------------------------------------------------------------
>>         *From:* Sudheer Joseph <sud...@ya...
>>         <javascript:return>>
>>         *To:* Paul Hobson <pmh...@gm... <javascript:return>>
>>         *Cc:* "mat...@li...
>>         <javascript:return>" <mat...@li...
>>         <javascript:return>>
>>         *Sent:* Saturday, 8 June 2013 7:46 PM
>>
>>         *Subject:* Re: [Matplotlib-users] time axis format
>>
>>         Thank you Paul for the helping hand,
>>                                            However I was looking for
>>         slightly different solution like in the attached plots. I used
>>         ferret to do this based on the length of the time axis it chose
>>         the mode of labelling. for example in case of 2 year plot it
>>         made month labeling as j f m etc and in case of 1 year as there
>>         is enough space on x axis it made jan feb etc with single label
>>         of year.
>>
>>         In the attached python plot (ATser_RAMA_HYCOM_U_8n90e.png) every
>>         tick point is lablled for year, which I wanted to avoid and get
>>         plots similar to the first types thought it is not done
>>         automatically but at least manually.
>>
>>
>>         ***************************************************************
>>         Sudheer Joseph
>>         Indian National Centre for Ocean Information Services
>>         Ministry of Earth Sciences, Govt. of India
>>         POST BOX NO: 21, IDA Jeedeemetla P.O.
>>         Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
>>         Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
>>         Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
>>         E-mail:sjo...@gm...
>>         <javascript:return>;sud...@ya... <javascript:return>
>>         Web- http://oppamthadathil.tripod.com
>>         ***************************************************************
>>
>>             ------------------------------------------------------------------------
>>             *From:* Paul Hobson <pmh...@gm... <javascript:return>>
>>             *To:* Sudheer Joseph <sud...@ya...
>>             <javascript:return>>
>>             *Cc:* "mat...@li...
>>             <javascript:return>" <mat...@li...
>>             <javascript:return>>
>>             *Sent:* Friday, 7 June 2013 8:50 PM
>>             *Subject:* Re: [Matplotlib-users] time axis format
>>
>>
>>
>>
>>             On Thu, Jun 6, 2013 at 11:39 PM, Sudheer Joseph
>>             <sud...@ya... <javascript:return>> wrote:
>>
>>                 Dear Experts,
>>                              I have been experimenting with the
>>                 plot_dates option of matplotlib to plot time series data
>>                 and have below questions
>>
>>                   I have used
>>                 loc = mdates.AutoDateLocator()
>>                 ax.xaxis.set_major_locator(loc)
>>                 ax.xaxis.set_major_formatter(mpl.dates.DateFormatter('%b\n
>>                 %Y'))
>>
>>
>>                 and got the tick labels in attached plot
>>
>>                 However I feel the repeatd year labeling is not needed
>>                 here and it is required once in a year only , Also if I
>>                 need to plot long time seris insted of "MAR" "APR" I
>>                 wanted to get them reduced to "M" "A" etc so that the
>>                 lavel congestion can be avoided.
>>
>>
>>                 I notice that below options are available, but was
>>                 wondering how commbinatins of these locateors are used
>>                 ie mark every month and every year once each.
>>
>>
>>                 Is there a way to achive the above or does it need
>>                 further development?
>>
>>                 fmt = mdates.DateFormatter('%Y-%m-%d')
>>                 loc =
>>                 mdates.WeekdayLocator(byweekday=mdates.MONDAY,interval=4)
>>                 locator = mdates.YearLocator()
>>
>>
>>             If I were trying to do this, I'd cobble something together
>>             using by the minor and major formatters.
>>             e.g.,...
>>             import matplotlib.dates as mdates
>>             import matplotlib.pyplot as plt
>>
>>             fig, ax = plt.subplots()
>>
>>             majorLocs = mdates.MonthLocator(bymonth[1,7])
>>             majorFmt = mdates.DateFormatter('%b\n%Y')
>>
>>             minorLocs = mdates.MonthLocator(bymonth[1,7])
>>             minorFmt = mdates.DateFormatter('%b')
>>
>>             ax.xaxis.set_major_locator(majorLocs)
>>             ax.xaxis.set_major_formatter(majorFmt)
>>
>>             ax.xaxis.set_minor_locator(minorLocs)
>>             ax.xaxis.set_minor_formatter(minorFmt)
>>
>>
>>
>>
>>
>>
>>
>> ------------------------------------------------------------------------------
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That looks like exactly what I am looking for. Thanks JJ.



--
View this message in context: http://matplotlib.1069221.n5.nabble.com/black-and-hatched-legend-handle-tp40979p41247.html
Sent from the matplotlib - users mailing list archive at Nabble.com.

On 2013/06/10 2:08 PM, Sudheer Joseph wrote:
>
> Thank you,
> So there is no way to get J F M A etc with out reducing font size? We
> often need to make presentation in front of senior people who insist for
> bigger fonts.
> With best regards,
> Sudheer

One way is to subclass DateFormatter, e.g.,

class MonthLetter(DateFormatter):
     def __init__(self):
         DateFormatter.__init__(self, "%b")

     def __call__(*args):
         s = DateFormatter.__call__(*args)
         return s[:1]

class MonthLetterYear(DateFormatter):
     def __init__(self):
         DateFormatter.__init__(self, "%b\n%Y")

     def __call__(*args):
         s = DateFormatter.__call__(*args)
         return = s[:1] + s[3:]

...

majorFmt = MonthLetterYear()
minorFmt = MonthLetter()


Not tested, but something like that should work.

Eric


>
>
> ------------------------------------------------------------------------
> *From: * Paul Hobson <pmh...@gm...>;
> *To: * Sudheer Joseph <sud...@ya...>;
> *Cc: * mat...@li...
> <mat...@li...>;
> *Subject: * Re: [Matplotlib-users] time axis format
> *Sent: * Mon, Jun 10, 2013 8:08:18 PM
>
> In that case, I would use ax.tick_params(...) to make the font smaller.
>
>
> On Sat, Jun 8, 2013 at 7:36 AM, Sudheer Joseph <sud...@ya...
> <javascript:return>> wrote:
>
>     Dear Paul,
>                     The issue I am facing is like in the attached plot
>     where the month naming get cluttered.
>     with best regards,
>     Sudheer
>     ***************************************************************
>     Sudheer Joseph
>     Indian National Centre for Ocean Information Services
>     Ministry of Earth Sciences, Govt. of India
>     POST BOX NO: 21, IDA Jeedeemetla P.O.
>     Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
>     Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
>     Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
>     E-mail:sjo...@gm...
>     <javascript:return>;sud...@ya... <javascript:return>
>     Web- http://oppamthadathil.tripod.com
>     ***************************************************************
>
>         ------------------------------------------------------------------------
>         *From:* Sudheer Joseph <sud...@ya...
>         <javascript:return>>
>         *To:* Paul Hobson <pmh...@gm... <javascript:return>>
>         *Cc:* "mat...@li...
>         <javascript:return>" <mat...@li...
>         <javascript:return>>
>         *Sent:* Saturday, 8 June 2013 7:46 PM
>
>         *Subject:* Re: [Matplotlib-users] time axis format
>
>         Thank you Paul for the helping hand,
>                                            However I was looking for
>         slightly different solution like in the attached plots. I used
>         ferret to do this based on the length of the time axis it chose
>         the mode of labelling. for example in case of 2 year plot it
>         made month labeling as j f m etc and in case of 1 year as there
>         is enough space on x axis it made jan feb etc with single label
>         of year.
>
>         In the attached python plot (ATser_RAMA_HYCOM_U_8n90e.png) every
>         tick point is lablled for year, which I wanted to avoid and get
>         plots similar to the first types thought it is not done
>         automatically but at least manually.
>
>
>         ***************************************************************
>         Sudheer Joseph
>         Indian National Centre for Ocean Information Services
>         Ministry of Earth Sciences, Govt. of India
>         POST BOX NO: 21, IDA Jeedeemetla P.O.
>         Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
>         Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
>         Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
>         E-mail:sjo...@gm...
>         <javascript:return>;sud...@ya... <javascript:return>
>         Web- http://oppamthadathil.tripod.com
>         ***************************************************************
>
>             ------------------------------------------------------------------------
>             *From:* Paul Hobson <pmh...@gm... <javascript:return>>
>             *To:* Sudheer Joseph <sud...@ya...
>             <javascript:return>>
>             *Cc:* "mat...@li...
>             <javascript:return>" <mat...@li...
>             <javascript:return>>
>             *Sent:* Friday, 7 June 2013 8:50 PM
>             *Subject:* Re: [Matplotlib-users] time axis format
>
>
>
>
>             On Thu, Jun 6, 2013 at 11:39 PM, Sudheer Joseph
>             <sud...@ya... <javascript:return>> wrote:
>
>                 Dear Experts,
>                              I have been experimenting with the
>                 plot_dates option of matplotlib to plot time series data
>                 and have below questions
>
>                   I have used
>                 loc = mdates.AutoDateLocator()
>                 ax.xaxis.set_major_locator(loc)
>                 ax.xaxis.set_major_formatter(mpl.dates.DateFormatter('%b\n
>                 %Y'))
>
>
>                 and got the tick labels in attached plot
>
>                 However I feel the repeatd year labeling is not needed
>                 here and it is required once in a year only , Also if I
>                 need to plot long time seris insted of "MAR" "APR" I
>                 wanted to get them reduced to "M" "A" etc so that the
>                 lavel congestion can be avoided.
>
>
>                 I notice that below options are available, but was
>                 wondering how commbinatins of these locateors are used
>                 ie mark every month and every year once each.
>
>
>                 Is there a way to achive the above or does it need
>                 further development?
>
>                 fmt = mdates.DateFormatter('%Y-%m-%d')
>                 loc =
>                 mdates.WeekdayLocator(byweekday=mdates.MONDAY,interval=4)
>                 locator = mdates.YearLocator()
>
>
>             If I were trying to do this, I'd cobble something together
>             using by the minor and major formatters.
>             e.g.,...
>             import matplotlib.dates as mdates
>             import matplotlib.pyplot as plt
>
>             fig, ax = plt.subplots()
>
>             majorLocs = mdates.MonthLocator(bymonth[1,7])
>             majorFmt = mdates.DateFormatter('%b\n%Y')
>
>             minorLocs = mdates.MonthLocator(bymonth[1,7])
>             minorFmt = mdates.DateFormatter('%b')
>
>             ax.xaxis.set_major_locator(majorLocs)
>             ax.xaxis.set_major_formatter(majorFmt)
>
>             ax.xaxis.set_minor_locator(minorLocs)
>             ax.xaxis.set_minor_formatter(minorFmt)
>
>
>
>
>
>
>
> ------------------------------------------------------------------------------
> This SF.net email is sponsored by Windows:
>
> Build for Windows Store.
>
> http://p.sf.net/sfu/windows-dev2dev
>
>
>
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>

On Mon, Jun 10, 2013 at 8:08 PM, Sudheer Joseph <sud...@ya...>wrote:

>
> Thank you,
> So there is no way to get J F M A etc with out reducing font size?
>

I bet there a number of ways.  Offhand I don't know the one that, once I
hear about it, I will say, "D'oh, that's so easy" but I bet it exists.  But
you could modify the DateFormatter class.  It is set to return a strftime
result string.  Here is the function:

def __call__(self, x, pos=0):
        if x==0:
            raise ValueError('DateFormatter found a value of x=0, which is
an illegal date.  This usually occurs because you have not informed the
axis that it is plotting dates, eg with ax.xaxis_date()')
        dt = num2date(x, self.tz)
        return self.strftime(dt, self.fmt)

All you would have to do is change that last line to:

        return self.strftime(dt, self.fmt)[0]

To slice just the first letter of the month.

So you could subclass DateFormatter to do this, since you probably don't
want to modify the actual DateFormatter class always in this way.

Also, aside from the J F M A approach, you could just rotate the month's
name, and that will reduce crowding while keeping the month a little
clearer (I think "JAN FEB MAR APR" is more intuitive and pleasant to read
on a graph).

Che




> We often need to make presentation in front of senior people who insist
> for bigger fonts.
> With best regards,
> Sudheer
>
>  ------------------------------
> * From: * Paul Hobson <pmh...@gm...>;
> * To: * Sudheer Joseph <sud...@ya...>;
> * Cc: * mat...@li... <
> mat...@li...>;
>  * Subject: * Re: [Matplotlib-users] time axis format
> * Sent: * Mon, Jun 10, 2013 8:08:18 PM
>
>   In that case, I would use ax.tick_params(...) to make the font smaller.
>
>
> On Sat, Jun 8, 2013 at 7:36 AM, Sudheer Joseph <sud...@ya...>wrote:
>
>> Dear Paul,
>>                The issue I am facing is like in the attached plot where
>> the month naming get cluttered.
>> with best regards,
>> Sudheer
>>
>> ***************************************************************
>> Sudheer Joseph
>> Indian National Centre for Ocean Information Services
>> Ministry of Earth Sciences, Govt. of India
>> POST BOX NO: 21, IDA Jeedeemetla P.O.
>> Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
>> Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
>> Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
>> E-mail:sjo...@gm...;sud...@ya...
>> Web- http://oppamthadathil.tripod.com
>> ***************************************************************
>>
>>   ------------------------------
>>  *From:* Sudheer Joseph <sud...@ya...>
>> *To:* Paul Hobson <pmh...@gm...>
>> *Cc:* "mat...@li..." <
>> mat...@li...>
>> *Sent:* Saturday, 8 June 2013 7:46 PM
>>
>> *Subject:* Re: [Matplotlib-users] time axis format
>>
>> Thank you Paul for the helping hand,
>>                                   However I was looking for slightly
>> different solution like in the attached plots. I used ferret to do this
>> based on the length of the time axis it chose the mode of labelling. for
>> example in case of 2 year plot it made month labeling as j f m etc and in
>> case of 1 year as there is enough space on x axis it made jan feb etc with
>> single label of year.
>>
>> In the attached python plot (ATser_RAMA_HYCOM_U_8n90e.png) every tick
>> point is lablled for year, which I wanted to avoid and get plots similar to
>> the first types thought it is not done automatically but at least manually.
>>
>>
>>
>> ***************************************************************
>> Sudheer Joseph
>> Indian National Centre for Ocean Information Services
>> Ministry of Earth Sciences, Govt. of India
>> POST BOX NO: 21, IDA Jeedeemetla P.O.
>> Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
>> Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
>> Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
>> E-mail:sjo...@gm...;sud...@ya...
>> Web- http://oppamthadathil.tripod.com
>> ***************************************************************
>>
>>   ------------------------------
>>  *From:* Paul Hobson <pmh...@gm...>
>> *To:* Sudheer Joseph <sud...@ya...>
>> *Cc:* "mat...@li..." <
>> mat...@li...>
>> *Sent:* Friday, 7 June 2013 8:50 PM
>> *Subject:* Re: [Matplotlib-users] time axis format
>>
>>
>>
>>
>> On Thu, Jun 6, 2013 at 11:39 PM, Sudheer Joseph <sud...@ya...
>> > wrote:
>>
>> Dear Experts,
>>             I have been experimenting with the plot_dates option of
>> matplotlib to plot time series data and have below questions
>>
>>  I have used
>> loc = mdates.AutoDateLocator()
>> ax.xaxis.set_major_locator(loc)
>> ax.xaxis.set_major_formatter(mpl.dates.DateFormatter('%b\n %Y'))
>>
>>
>> and got the tick labels in attached plot
>>
>> However I feel the repeatd year labeling is not needed here and it is
>> required once in a year only , Also if I need to plot long time seris
>> insted of "MAR" "APR" I wanted to get them reduced to "M" "A" etc so that
>> the lavel congestion can be avoided.
>>
>>
>> I notice that below options are available, but was wondering how
>> commbinatins of these locateors are used ie mark every month and every year
>> once each.
>>
>>
>> Is there a way to achive the above or does it need further development?
>>
>> fmt = mdates.DateFormatter('%Y-%m-%d')
>> loc = mdates.WeekdayLocator(byweekday=mdates.MONDAY,interval=4)
>> locator = mdates.YearLocator()
>>
>>
>> If I were trying to do this, I'd cobble something together using by the
>> minor and major formatters.
>> e.g.,...
>> import matplotlib.dates as mdates
>> import matplotlib.pyplot as plt
>>
>> fig, ax = plt.subplots()
>>
>> majorLocs = mdates.MonthLocator(bymonth[1,7])
>> majorFmt = mdates.DateFormatter('%b\n%Y')
>>
>> minorLocs = mdates.MonthLocator(bymonth[1,7])
>> minorFmt = mdates.DateFormatter('%b')
>>
>> ax.xaxis.set_major_locator(majorLocs)
>> ax.xaxis.set_major_formatter(majorFmt)
>>
>> ax.xaxis.set_minor_locator(minorLocs)
>> ax.xaxis.set_minor_formatter(minorFmt)
>>
>>
>>
>>
>>
>
>
> ------------------------------------------------------------------------------
> This SF.net email is sponsored by Windows:
>
> Build for Windows Store.
>
> http://p.sf.net/sfu/windows-dev2dev
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
>

Thank you,
So there is no way to get J F M A etc with out reducing font size? We often need to make presentation in front of senior people who insist for bigger fonts.
With best regards,
Sudheer