matplotlib-users Mailing List for matplotlib

On Thu, Jul 29, 2010 at 2:02 PM, Gary Pajer <gar...@gm...> wrote:

> I recall that there is an site online that produces all kinds of plots
> using mpl to render them.  It has a name something like "zumzum".
>
> Does anyone know what I'm talking about (and can you point me there?)
>
> thx,
> gary
>
>
> ------------------------------------------------------------------------------
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>
>
Very close, it is at zunzun.com :)

-- 
Gökhan

On Thu, Jul 29, 2010 at 8:45 AM, Waléria Antunes David <
wal...@gm...> wrote:

> Hi
>
> I made the changes as bellow and it displays the x-axis values formatted as
> expected, see my current image and my code. But, now i need to change the
> scale and the numbers of decimal places in order to appear on the graph like
> this: 3.0     3.1      3.2      ......           3.4
>
> My code: http://pastebin.com/vSbkXDzE
>
> Can you help me?
>
> Waleria
>
>
> On Wed, Jul 28, 2010 at 8:41 PM, <
> mat...@li...> wrote:
>
>> Send Matplotlib-users mailing list submissions to
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>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of Matplotlib-users digest..."
>>
>>
>> Today's Topics:
>>
>>   1. Re: hz to khz (Angus McMorland)
>>   2. Re: hz to khz (Benjamin Root)
>>   3. Arrow in log space (Thomas Robitaille)
>>   4. Re: Arrow in log space (Benjamin Root)
>>   5. Re: Confusion Matrix (Simon Friedberger)
>>   6. Re: Saving as eps file shifts image? (Jae-Joon Lee)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Wed, 28 Jul 2010 15:39:29 -0400
>> From: Angus McMorland <am...@gm...>
>> Subject: Re: [Matplotlib-users] hz to khz
>> To: Matplotlib Users <mat...@li...>
>> Message-ID:
>>        <AAN...@ma...<AANLkTinomazdZccuuKenq%2BC99Y%2B0EWC_o7O%2B6...@ma...>
>> >
>> Content-Type: text/plain; charset=ISO-8859-1
>>
>> On 28 July 2010 15:25, Wal?ria Antunes David <wal...@gm...>
>> wrote:
>> > Hello all,
>> >
>> > Well, my problem is ... My current code is as follow bellow:
>> > http://pastebin.com/7p2N5d64
>>
>> Hi Wal?ria,
>>
>> We can't easily fix your problem without knowing what data f and
>> Sserie contain. It would help us to help you if you could post a
>> standalone example that shows your problem without relying on external
>> data.
>>
>> Angus.
>> --
>> AJC McMorland
>> Post-doctoral research fellow
>> Neurobiology, University of Pittsburgh
>>
>>
>>
>> ------------------------------
>>
>> Message: 2
>> Date: Wed, 28 Jul 2010 14:59:35 -0500
>> From: Benjamin Root <ben...@ou...>
>> Subject: Re: [Matplotlib-users] hz to khz
>> To: Angus McMorland <am...@gm...>
>> Cc: Matplotlib Users <mat...@li...>
>> Message-ID:
>>        <AANLkTi=O73E3atkQprZO5_LMpfOu=72C...@ma...>
>> Content-Type: text/plain; charset="iso-8859-1"
>>
>> On Wed, Jul 28, 2010 at 2:39 PM, Angus McMorland <am...@gm...>
>> wrote:
>>
>> > On 28 July 2010 15:25, Wal?ria Antunes David <wal...@gm...>
>> > wrote:
>> > > Hello all,
>> > >
>> > > Well, my problem is ... My current code is as follow bellow:
>> > > http://pastebin.com/7p2N5d64
>> >
>> > Hi Wal?ria,
>> >
>> > We can't easily fix your problem without knowing what data f and
>> > Sserie contain. It would help us to help you if you could post a
>> > standalone example that shows your problem without relying on external
>> > data.
>> >
>> > Angus.
>> > --
>> > AJC McMorland
>> > Post-doctoral research fellow
>> > Neurobiology, University of Pittsburgh
>> >
>> >
>> Angus is correct that providing a stand-alone version of the script that
>> replicates your problem would be most useful.  I would like to mention a
>> couple of possible improvements to your code.  These improvements may or
>> may
>> not fix your issue, but they will improve your current code.
>>
>> 1) Use list comprehensions
>>
>> Change
>>
>> y=[]
>> for n in f:
>>    y.append(n/Decimal(1000))
>> y = numpy.array(y)
>>
>> into:
>>
>> y = numpy.array(f) / 1000.0
>>
>> Also,
>>
>> ax.grid('TRUE')
>>
>> should be:
>>
>>  ax.grid(True)
>>
>> I hope this helps.  If not, then please send a stand-alone example that
>> duplicates the problem you are having.
>> Ben Root
>> -------------- next part --------------
>> An HTML attachment was scrubbed...
>>
>> ------------------------------
>>
>> Message: 3
>> Date: Wed, 28 Jul 2010 16:56:41 -0400
>> From: Thomas Robitaille <tho...@gm...>
>> Subject: [Matplotlib-users] Arrow in log space
>> To: mat...@li...
>> Message-ID: <FC4...@gm...>
>> Content-Type: text/plain; charset=us-ascii
>>
>> Hi,
>>
>> How does one plot an arrow in a log log plot? In the following example, I
>> can't get the arrow head, regardless of what value I use for the head width:
>>
>> import matplotlib as mpl
>> mpl.use('Agg')
>> import matplotlib.pyplot as plt
>>
>> fig = plt.figure()
>> ax = fig.add_subplot(1,1,1)
>> ax.arrow(0.2,0.2,0.5,0.5,head_width=1.)
>> ax.set_xscale('log')
>> ax.set_yscale('log')
>> ax.set_xlim(0.1,1.)
>> ax.set_ylim(0.1,1.)
>> fig.savefig('test.png')
>>
>> In addition, the documentation for arrow does not even mention any arrow
>> specific options such as the head width/length, and the example plot is
>> missing (there is a 'Exception occurred rendering plot.' message instead)
>>
>>
>> http://matplotlib.sourceforge.net/api/axes_api.html?highlight=arrow#matplotlib.axes.Axes.arrow
>>
>> Thanks for any help,
>>
>> Thomas
>>
>>
>> ------------------------------
>>
>> Message: 4
>> Date: Wed, 28 Jul 2010 16:45:39 -0500
>> From: Benjamin Root <ben...@ou...>
>> Subject: Re: [Matplotlib-users] Arrow in log space
>> To: Thomas Robitaille <tho...@gm...>
>> Cc: mat...@li...
>> Message-ID:
>>        <AANLkTi=hCGCs9FVO0O6z=qVybsBMNwoBo=OW9...@ma...>
>> Content-Type: text/plain; charset="iso-8859-1"
>>
>> On Wed, Jul 28, 2010 at 3:56 PM, Thomas Robitaille <
>> tho...@gm...> wrote:
>>
>> > Hi,
>> >
>> > How does one plot an arrow in a log log plot? In the following example,
>> I
>> > can't get the arrow head, regardless of what value I use for the head
>> width:
>> >
>> > import matplotlib as mpl
>> > mpl.use('Agg')
>> > import matplotlib.pyplot as plt
>> >
>> > fig = plt.figure()
>> > ax = fig.add_subplot(1,1,1)
>> > ax.arrow(0.2,0.2,0.5,0.5,head_width=1.)
>> > ax.set_xscale('log')
>> > ax.set_yscale('log')
>> > ax.set_xlim(0.1,1.)
>> > ax.set_ylim(0.1,1.)
>> > fig.savefig('test.png')
>> >
>> > In addition, the documentation for arrow does not even mention any arrow
>> > specific options such as the head width/length, and the example plot is
>> > missing (there is a 'Exception occurred rendering plot.' message
>> instead)
>> >
>> >
>> >
>> http://matplotlib.sourceforge.net/api/axes_api.html?highlight=arrow#matplotlib.axes.Axes.arrow
>> >
>> > Thanks for any help,
>> >
>> > Thomas
>> >
>>
>> I can't say anything with regards to why your figure is not working, or
>> why
>> the plot fails to render online (it renders just fine for myself when
>> built
>> locally).  However, I have noticed that the lack of information regarding
>> the options for arrow seems to be related to the docstring for arrow()
>> referring to the kwargs for FancyArrow, but none of those are defined.
>>  And
>> the docstring for FancyArrow appears to be incomplete.
>>
>> Ben Root
>> -------------- next part --------------
>> An HTML attachment was scrubbed...
>>
>> ------------------------------
>>
>> Message: 5
>> Date: Thu, 29 Jul 2010 00:04:41 +0200
>> From: Simon Friedberger <sim...@a-...<simon%2Bm...@a-...>
>> >
>> Subject: Re: [Matplotlib-users] Confusion Matrix
>> To: mat...@li...
>> Message-ID: <201...@a-...>
>> Content-Type: text/plain; charset=us-ascii
>>
>> On 18:32 Sun 18.07.10, Friedrich Romstedt wrote:
>> > Try to add:
>> > ax.set_xticks(range(0, 10))
>> > ax.set_yticks(range(0, 10))
>> >
>> > before the imshow call.
>> >
>> > For some reason it must happen before the imshow call and not after,
>> > else the yscaling will change (I don't understand this).
>>
>> Thanks for this tip. Apparently there is a necessary order for some calls.
>> Is this documented anywhere? It seems quite problematic.
>>
>> Also I have now finished my confusion matrix program:
>> http://paste.pocoo.org/show/242834/
>> Comments on the code would be very welcome.
>>
>> If people like it maybe it could be included in the examples. I think it's
>> a
>> relatively common usecase.
>>
>> Regards
>> Simon
>>
>>
>>
>> ------------------------------
>>
>> Message: 6
>> Date: Thu, 29 Jul 2010 08:40:54 +0900
>> From: Jae-Joon Lee <lee...@gm...>
>> Subject: Re: [Matplotlib-users] Saving as eps file shifts image?
>> To: "Jenna L." <je...@as...>
>> Cc: mat...@li...
>> Message-ID:
>>        <AAN...@ma...>
>> Content-Type: text/plain; charset="utf-8"
>>
>> On Thu, Jul 29, 2010 at 1:17 AM, Jenna L. <je...@as...>
>> wrote:
>> > That looks fine to me too, but if you plot that as one subplot in a 5x5
>> array
>> > of subplots or more, then you can see the shift I am talking about in
>> the
>> > eps file. ?Example:
>>
>> I still don't see it (a capture of my eps output is attached).
>> Can you post your output  (original eps file that shows the shift)?
>>
>> Again, what is your matplotlib version?
>>
>> Regards,
>>
>> -JJ
>> -------------- next part --------------
>> A non-text attachment was scrubbed...
>> Name: image_shift_test.png
>> Type: image/png
>> Size: 13176 bytes
>> Desc: not available
>>
>> ------------------------------
>>
>>
>> ------------------------------------------------------------------------------
>> The Palm PDK Hot Apps Program offers developers who use the
>> Plug-In Development Kit to bring their C/C++ apps to Palm for a share
>> of $1 Million in cash or HP Products. Visit us here for more details:
>> http://p.sf.net/sfu/dev2dev-palm
>>
>> ------------------------------
>>
>> _______________________________________________
>> Matplotlib-users mailing list
>> Mat...@li...
>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>
>>
>> End of Matplotlib-users Digest, Vol 50, Issue 79
>> ************************************************
>>
>
>

I recall that there is an site online that produces all kinds of plots using
mpl to render them.  It has a name something like "zumzum".

Does anyone know what I'm talking about (and can you point me there?)

thx,
gary

Hi Ryan,

bad luck, I use the version 0.99.3 ... and currently I must keep on using it ...

Would you see another way to proceed from matplotlib ?

thanks

Eric

--- En date de : Jeu 29.7.10, Ryan May <rm...@gm...> a écrit :

De: Ryan May <rm...@gm...>
Objet: Re: [Matplotlib-users] catching close figure event
À: "Pellegrini Eric" <eri...@ya...>
Cc: "Benjamin Root" <ben...@ou...>, mat...@li...
Date: Jeudi 29 juillet 2010, 19h29

On Thu, Jul 29, 2010 at 12:26 PM, Benjamin Root <ben...@ou...> wrote:


On Thu, Jul 29, 2010 at 12:18 PM, Pellegrini Eric <eri...@ya...> wrote:




Hello everybody,

I would like to call a function when I close manually a window previously opened by a pylab.figure. I tried the following:





f = pylab.figure()
f.canvas.mpl_connect('close_event',my_function)

but it fails because the 'close_event' is not recognized as a valid event (button_press_event, axis_leave_event ...). Would you have any idea ?





thank you very much

Eric,



Which version of matplotlib are you using?  "close_event" is a valid event identifier.
It was added in the most recent 1.0, so make sure you have that.


Ryan
-- 
Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma




      

Hi Ben,

I use the version 0.99.3. 

Eric

--- En date de : Jeu 29.7.10, Benjamin Root <ben...@ou...> a écrit :

De: Benjamin Root <ben...@ou...>
Objet: Re: [Matplotlib-users] catching close figure event
À: "Pellegrini Eric" <eri...@ya...>
Cc: mat...@li...
Date: Jeudi 29 juillet 2010, 19h26

On Thu, Jul 29, 2010 at 12:18 PM, Pellegrini Eric <eri...@ya...> wrote:


Hello everybody,

I would like to call a function when I close manually a window previously opened by a pylab.figure. I tried the following:



f = pylab.figure()
f.canvas.mpl_connect('close_event',my_function)

but it fails because the 'close_event' is not recognized as a valid event (button_press_event, axis_leave_event ...). Would you have any idea ?



thank you very much

regards

Eric Pellegrini



Eric,

Which version of matplotlib are you using?  "close_event" is a valid event identifier.



Ben Root




      

On Thu, Jul 29, 2010 at 12:26 PM, Benjamin Root <ben...@ou...> wrote:

> On Thu, Jul 29, 2010 at 12:18 PM, Pellegrini Eric <eri...@ya...
> > wrote:
>
>> Hello everybody,
>>
>> I would like to call a function when I close manually a window previously
>> opened by a pylab.figure. I tried the following:
>>
>> f = pylab.figure()
>> f.canvas.mpl_connect('close_event',my_function)
>>
>> but it fails because the 'close_event' is not recognized as a valid event
>> (button_press_event, axis_leave_event ...). Would you have any idea ?
>>
>> thank you very much
>>
>> Eric,
>
> Which version of matplotlib are you using?  "close_event" is a valid event
> identifier.
>

It was added in the most recent 1.0, so make sure you have that.

Ryan

-- 
Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma

On Thu, Jul 29, 2010 at 12:18 PM, Pellegrini Eric
<eri...@ya...>wrote:

> Hello everybody,
>
> I would like to call a function when I close manually a window previously
> opened by a pylab.figure. I tried the following:
>
> f = pylab.figure()
> f.canvas.mpl_connect('close_event',my_function)
>
> but it fails because the 'close_event' is not recognized as a valid event
> (button_press_event, axis_leave_event ...). Would you have any idea ?
>
> thank you very much
>
> regards
>
> Eric Pellegrini
>
>
>
Eric,

Which version of matplotlib are you using?  "close_event" is a valid event
identifier.

Ben Root

Hello everybody,

I would like to call a function when I close manually a window previously opened by a pylab.figure. I tried the following:

f = pylab.figure()
f.canvas.mpl_connect('close_event',my_function)

but it fails because the 'close_event' is not recognized as a valid event (button_press_event, axis_leave_event ...). Would you have any idea ?

thank you very much

regards

Eric Pellegrini



      

On Wed, Jul 28, 2010 at 1:54 PM, Eric Firing <ef...@ha...> wrote:

> On 07/28/2010 05:48 AM, Benjamin Root wrote:
>
>> On Tue, Jul 27, 2010 at 1:31 PM, Friedrich Romstedt
>> <fri...@gm... <mailto:fri...@gm...>> wrote:
>>
>>    2010/7/26 Benjamin Root <ben...@ou... <mailto:ben...@ou...>>:
>>
>>     > After some reading of sphinx documentation, it appears to be a
>>    bug with
>>     > sphinx (or actually, "smartypants") because it should not be
>>    doing this sort
>>     > of interpretation within a docstring.  Anyway, supposedly the
>>    workaround is
>>     > to put double backticks around the part that needs to be treated
>>    literally:
>>     > ``'--'``.  I tried this out and built the docs locally and it
>>    works... sort
>>     > of.  The text that is surrounded by double backticks are getting
>>    a different
>>     > background color.  This doesn't look great to me.  Maybe someone
>>    else has a
>>     > thought?
>>
>>    How looks a backticked empty string like?  If it is just nothing, it
>>    could be used in between of the two hyphens, to separate them by
>>    "nothing".  Still very hackish ... But it's just like LaTeX -{}-.
>>
>>    Friedrich
>>
>>
>> Actually, I just took another look at the documentation and realized
>> that the docstring for set_linestyle() was inconsistent with the docs
>> for plot().  plot() have been using the backticks for a while now, so if
>> we just use the double-backticks for all the values in set_linestyle()
>> it would be consistent and look much better than it is now.
>>
>> I can make these changes and commit them to the trunk and the release
>> branch, if that is ok.
>>
>
> Ben,
>
> Sounds reasonable--go ahead.
>
> Thanks.
>
> Eric
>

Done in r8593 and r8594

Ben Root

On Thu, Jul 29, 2010 at 10:07 AM, Matthias Michler
<Mat...@gm...>wrote:

> On Thursday July 29 2010 12:05:24 Bala subramanian wrote:
> > Friends,
> > I wrote a small script to plot a data and its pdf in single figure but as
> > two subplots.
> >
> > 1) However i want to share xaxis of ax2 (subplot 122) with the y axis of
> > ax1 (subplot 121). What function should i use do that. I tried sharex and
> > sharey but i am not gettting what i want.
> >
> > 2) Is there any possiblity to one of the subplot for instance i want to
> > rotate ax2 by 90.
> >
> > #!/usr/bin/env python
> > import matplotlib.pyplot as plt
> > import numpy as np
> > import matplotlib.mlab as mlb
> > data1=np.loadtxt('test.rms',usecols=(1,))
> > fig=plt.figure()
> > ax1=fig.add_subplot(121)
> > ax2=fig.add_subplot(122)
> > ax1.plot(data1)
> > mu,sigma=np.mean(data1),np.std(data1)
> > n, bins, patches = ax2.hist(data1, bins=25, normed=1, facecolor='green',
> > alpha=0.75,visible=False)
> > y = mlb.normpdf( bins, mu, sigma)
> > l = ax2.plot(bins,y,'-',linewidth=1.2)
> > plt.show()
>
> Hi Bala,
>
> I attached a small stand-alone example, which illustrates two ways of
> showing
> data and its pdf sharing one axis. Maybe this can serve as a starting point
> for you to solve the problem or you can describe in more detail what is
> missing.
>
> Kind regards,
> Matthias
>
>
Actually, I think Bala is asking for something different, and I while I
think matplotlib is *capable* of doing it, I am not aware of any easy-to-use
function to do it.  Currently, you can share a pair of x axes, or a pair of
y axes.  This is fairly straight-forward because the axes object returned
from a .add_subplot() command contains both axis objects, and you can easily
pass in another axes object to the sharex or sharey keyword arguments.
Those sharex and sharey arguments assume that you mean to pair-up the x axis
of the two axes objects, or the y axis of the two axes objects.  However,
what we want here is the ability to have the x axis in one axes object to be
paired with the y axis of another axes object.  This is a completely
different, but valid, use-case and would be a useful feature to make
available (or at least, better documented).

Ben Root

I am trying to figure out how to set 'buffers' or something of the sort on my
matplotlib plots, so that my first and last data points are not centered
exactly on the left and right border of the axis.
my Y axis does this just fine (integer data), but my X axis has no
buffer/margin what soever.


my graphing routine is as such (most fields are variables)   any help is
appreciated!:
 PlotVar.set_xlabel(xlabel)
        PlotVar.set_ylabel(ylabel)
        PlotVar.set_title(title)
        PlotVar.plot(data[xtarget][np.isfinite(data[ytarget1])],
data[ytarget1][np.isfinite(data[ytarget1])], '-o', ms=6, lw=2, alpha=0.5,
mfc='orange', label=label1)
        PlotVar.plot(data[xtarget][np.isfinite(data[ytarget2])],
data[ytarget2][np.isfinite(data[ytarget2])], '-o', ms=6, lw=2, alpha=0.5,
mfc='red', label=label2)
        PlotVar.xaxis.set_major_locator(xdays)
        PlotVar.xaxis.set_major_formatter(DateFormatter('%m-%d'))
        PlotVar.xaxis.set_minor_locator(xhours)
        PlotVar.fmt_xdata = DateFormatter('%m-%d')
        figVar.autofmt_xdate(rotation=-90, ha='left')
        highY1                   =
max(data[ytarget1][np.isfinite(data[ytarget1])])
        lowY1                    =
min(data[ytarget1][np.isfinite(data[ytarget1])])
        highY2                   =
max(data[ytarget2][np.isfinite(data[ytarget2])])
        lowY2                    =
min(data[ytarget2][np.isfinite(data[ytarget2])])
        maxvalue                = max(highY1, highY2)
        minvalue                = min(lowY1, lowY2)
       
PlotVar.yaxis.set_major_locator(mticker.MultipleLocator(base=round(((maxvalue
- minvalue)/10),3)))
       
PlotVar.yaxis.set_minor_locator(mticker.MultipleLocator(base=round(((maxvalue
- minvalue)/40),5)))
        plt.legend(loc='best',
prop=matplotlib.font_manager.FontProperties(size=10))
        PlotVar.grid()
        figVar.savefig(saveto)
-- 
View this message in context: http://old.nabble.com/Data-margin-buffer-in-matplotlib-%28Date-formatted-axis%29-tp29297756p29297756.html
Sent from the matplotlib - users mailing list archive at Nabble.com.

Jeff Whitaker <jsw...@pu...> writes:
> On 7/28/10 8:32 PM, Nikolaus Rath wrote:
>> Hello,
>>
>> What is the best way to generate a contour plot from a set of
>> non-uniformly sampled data (i.e., the datapoints do not lie on the
>> points of a rectangular grid but are randomly distributed)?
>>
>>
>> Thanks,
>>
>>     -Nikolaus
>>
>>    
> Nikolaus: You can either use mlab.griddata to interpolate the data to a 
> regular grid, or use pyplot.tricontour to perform a delaunay 
> triangulation and contour the resulting triangle values.

Fantastic, thanks!


Best,

   -Nikolaus

-- 
 »Time flies like an arrow, fruit flies like a Banana.«

  PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6  02CF A9AD B7F8 AE4E 425C

On Jul 28, 2010, at 6:55 PM, "Jenna L." <je...@as...> wrote:

> 
> Hmm that is not what my output looks like.  Attached is a capture of my
> output.  I am using matplotlib version 0.98.5.3   
> http://old.nabble.com/file/p29291928/shift_subplot_test.png
> shift_subplot_test.png 
> 



You version of mpl is pretty old. You'll need to upgrade. 

On 29/07/10 12:45, Waléria Antunes David wrote:
> Hi Benjamim,
>
> I made the changes as bellow and it displays the x-axis values formatted as
> expected, see my current image and my code. But, now i need to change the
> scale and the numbers of decimal places in order to appear on the graph like
> this: 3.0     3.1      3.2      ......           3.4
>
> My code: http://pastebin.com/vSbkXDzE
>
> Can you help me?
>
> Waleria


What do you mean by "change the scale"?

For some magical reason when I set the ticks_position to none, setting
the label_position to 'top' is ignored.
Did you try this? Is it another command arrangement thing?

On 09:26 Thu 29.07.10, Friedrich Romstedt wrote:
> axis.set_label_position('top')
> axis.set_ticks_position('none')

2010/7/29 Simon Friedberger <sim...@a-...>:
> Also I have now finished my confusion matrix program:
> http://paste.pocoo.org/show/242834/
> Comments on the code would be very welcome.

I think you can make use of

axis.set_label_position('top')
axis.set_ticks_position('none')

Friedrich

Hi,

In scikits.learn, there is a confusion matrix and in the samples,
there are several plots (scikit-learn.sf.net).

Matthieu

2010/7/16 Simon Friedberger <sim...@a-...>:
> Hello List.
>
> I'm trying to plot a confusion matrix and I got this far:
> http://paste.pocoo.org/show/238332/
>
> Basically what I still want to do is get the ticklabels from the bottom
> to the top, have every ticklabel shown and start showing them from the
> first not from the second.
>
> I have experimented with this for a while now and don't have all the
> code states at hand anymore but basically at several points some of the
> above worked but the others didn't or something else (like the axis
> length) broke.
>
> Best
> Simon
>
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On 7/28/10 8:32 PM, Nikolaus Rath wrote:
> Hello,
>
> What is the best way to generate a contour plot from a set of
> non-uniformly sampled data (i.e., the datapoints do not lie on the
> points of a rectangular grid but are randomly distributed)?
>
>
> Thanks,
>
>     -Nikolaus
>
>    
Nikolaus:  You can either use mlab.griddata to interpolate the data to a 
regular grid, or use pyplot.tricontour to perform a delaunay 
triangulation and contour the resulting triangle values.

-Jeff

Hello,

What is the best way to generate a contour plot from a set of
non-uniformly sampled data (i.e., the datapoints do not lie on the
points of a rectangular grid but are randomly distributed)?


Thanks,

   -Nikolaus

-- 
 »Time flies like an arrow, fruit flies like a Banana.«

  PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6  02CF A9AD B7F8 AE4E 425C

I think her problem is something like that

His values on X Axis is a range between 3000 to 3400

without this division by 1000.0 his graphic processing normally

but instead on X axis to show the range between 3000 to 3400
she needs to show this values transform in Hz (I think) that's why the
division by 1000.0

only problem when this division occur
the values o X axis became 3.0 to 3.4
and that's what she's send to plot

she should send the original values (3000 to 3400) and some how change the X
values that appear on X axis by another way

because the way it's goes, plot function receive a little range on X axis to
plot a graphic
incompatible to Y axis values, that are passing on Sseries variable

that's why she's graphics not show after that division
and appear when the division is remove from the code.

so... she question should be something like

I send to plot on X axis values between 3000 to 3400
but on X axis they must appear as 3.0 to 3.4

how can I change the values on X axis
without change the real X axis values I send...

... did I help...? I hope so...

see ya all




2010/7/28 Benjamin Root <ben...@ou...>

> On Wed, Jul 28, 2010 at 2:39 PM, Angus McMorland <am...@gm...>wrote:
>
>> On 28 July 2010 15:25, Waléria Antunes David <wal...@gm...>
>> wrote:
>> > Hello all,
>> >
>> > Well, my problem is ... My current code is as follow bellow:
>> > http://pastebin.com/7p2N5d64
>>
>> Hi Waléria,
>>
>> We can't easily fix your problem without knowing what data f and
>> Sserie contain. It would help us to help you if you could post a
>> standalone example that shows your problem without relying on external
>> data.
>>
>> Angus.
>> --
>> AJC McMorland
>> Post-doctoral research fellow
>> Neurobiology, University of Pittsburgh
>>
>>
> Angus is correct that providing a stand-alone version of the script that
> replicates your problem would be most useful.  I would like to mention a
> couple of possible improvements to your code.  These improvements may or may
> not fix your issue, but they will improve your current code.
>
> 1) Use list comprehensions
>
> Change
>
> y=[]
> for n in f:
>     y.append(n/Decimal(1000))
> y = numpy.array(y)
>
> into:
>
> y = numpy.array(f) / 1000.0
>
> Also,
>
> ax.grid('TRUE')
>
> should be:
>
>  ax.grid(True)
>
> I hope this helps.  If not, then please send a stand-alone example that
> duplicates the problem you are having.
> Ben Root
>
>
>
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