matplotlib-users Mailing List for matplotlib

I would recommend using "pylab.load" for reading the data.  For example:

x, y = pylab.load("filename", unpack=True)  # with other options as 
required





sa6113 <s.p...@gm...> 
Sent by: mat...@li...
09/02/2008 07:34 PM

To
mat...@li...
cc

Subject
[Matplotlib-users]  Curve fitting ...






Hello there, I have a problem on curve fitting , would you please help me 
?! I want to to develop a application that reads a text file with 2 
columns of floating point data (as x and y) and performs a polynomial 
curve fit of the data at the order specified by the end user and then 
provides the curve-fit coefficients as well as the curve fit errors. My 
problem is in curve fit errors , I want to abtain Max and L2-norm of 
error. In addition I use "matplotlib.mlab module " and polyfit function 
for computing polynomial curve fit. Regards. 
View this message in context: Curve fitting ...
Sent from the matplotlib - users mailing list archive at Nabble.com.

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Ryan May wrote:
> Hi,
>
> I'm getting the following on Gentoo Linux:
> #python hurrtracks.py
> Traceback (most recent call last):
>   File "hurrtracks.py", line 7, in <module>
>     from matplotlib.toolkits.basemap import Basemap as Basemap
>   File
> "/usr/lib/python2.5/site-packages/matplotlib/toolkits/basemap/__init__.py",
> line 1, in <module>
>     from basemap import __doc__, __version__
>   File
> "/usr/lib/python2.5/site-packages/matplotlib/toolkits/basemap/basemap.py",
> line 33, in <module>
>     import pyproj, sys, os, math, dbflib
>   File
> "/usr/lib/python2.5/site-packages/matplotlib/toolkits/basemap/pyproj.py",
> line 49, in <module>
>     from _geod import Geod as _Geod
> ImportError:
> /usr/lib64/python2.5/site-packages/matplotlib/toolkits/basemap/_geod.so:
> undefined symbol: pj_errno
>
> Any clues as to why this would be happening?  As far as I can tell,
> pj_errno would be in Proj, which basemap has a version of internally.
>
> Ryan
>
>   
Ryan:  Nothing comes immediately to mind - unless something went wrong 
with your build.    Could you rebuild basemap and send me the a log of 
the build off-list?

-Jeff


-- 
Jeffrey S. Whitaker         Phone  : (303)497-6313
Meteorologist               FAX    : (303)497-6449
NOAA/OAR/PSD  R/PSD1        Email  : Jef...@no...
325 Broadway                Office : Skaggs Research Cntr 1D-124
Boulder, CO, USA 80303-3328 Web    : http://tinyurl.com/5telg

Hi,

I'm getting the following on Gentoo Linux:
#python hurrtracks.py
Traceback (most recent call last):
  File "hurrtracks.py", line 7, in <module>
    from matplotlib.toolkits.basemap import Basemap as Basemap
  File
"/usr/lib/python2.5/site-packages/matplotlib/toolkits/basemap/__init__.py",
line 1, in <module>
    from basemap import __doc__, __version__
  File
"/usr/lib/python2.5/site-packages/matplotlib/toolkits/basemap/basemap.py",
line 33, in <module>
    import pyproj, sys, os, math, dbflib
  File
"/usr/lib/python2.5/site-packages/matplotlib/toolkits/basemap/pyproj.py",
line 49, in <module>
    from _geod import Geod as _Geod
ImportError:
/usr/lib64/python2.5/site-packages/matplotlib/toolkits/basemap/_geod.so:
undefined symbol: pj_errno

Any clues as to why this would be happening?  As far as I can tell,
pj_errno would be in Proj, which basemap has a version of internally.

Ryan

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

On Mon, 11 Feb 2008, Ted Drain apparently wrote:
> Is econpy still under development? 

Yes.  Primarily during summers.  ;-)
New developers and other contributors are welcome.

Cheers,
Alan Isaac

Mike -- thanks for your response. I thought I had tried this and it didn't work. I guess I didn't!!!!  I just tried the following equivalent approach:

ML.rcParams['font.family'] = 'serif'
ML.rcParams['font.serif'] = ['Cambria Math'] + ML.rcParams['font.serif']

and it worked like a charm.

Thanks again.

---- Michael Droettboom <md...@st...> wrote: 
> You shouldn't edit rcsetup.py directly -- that is part of the matplotlib 
> source code.  Instead, you should edit the matplotlibrc settings file.
> 
> In there, you'll actually want to change two settings:
> 
>   1) Add Cambria to the front of the font.serif list
>   2) Set "font.family" to "serif", so that mpl will use that list.
> 
> Hope this helps,
> Mike
> 
> chu...@ch... wrote:
> > I would like to be able to use Cambria font  (http://en.wikipedia.org/wiki/Cambria_(typeface)) for all text on my charts. 
> > 
> > I am adding these charts to a MS Word 2007 document written in the same font.
> > 
> > I tried to add Cambria as the fist string in rcsetup.py | defaultParams | 'font.serif'.  That didn't work.  Can I use this font for the charts?
> > 
> > 
> > -------------------------------------------------------------------------
> > This SF.net email is sponsored by: Microsoft
> > Defy all challenges. Microsoft(R) Visual Studio 2008.
> > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> > _______________________________________________
> > Matplotlib-users mailing list
> > Mat...@li...
> > https://lists.sourceforge.net/lists/listinfo/matplotlib-users
> 
> -- 
> Michael Droettboom
> Science Software Branch
> Operations and Engineering Division
> Space Telescope Science Institute
> Operated by AURA for NASA

s_pushparaj <s_p...@ho...> writes:
> I am working to plot and compare distributions. For that I require the
> grp2idx.m file to run boxplotC.m. Kindly help me get the request m file.

It looks like you got the wrong list. This list is for discussing
matplotlib, a Python plotting package. You refer to "m files", by 
which I suppose you mean Matlab code. You can find Matlab code at
http://www.mathworks.com/matlabcentral/

-- 
Jouni K. Seppänen
http://www.iki.fi/jks

Thanks!  Is econpy still under development?

> -----Original Message-----
> From: mat...@li...
> [mailto:mat...@li...] On Behalf Of
> Alan G Isaac
> Sent: Monday, February 11, 2008 10:00 AM
> To: mat...@li...
> Subject: Re: [Matplotlib-users] Create powerpoint slide and/or
> presentation from script?
> 
> On Mon, 11 Feb 2008, Ted Drain apparently wrote:
> > Does anyone know of a way to create a powerpoint slide from a plot?
> 
> <URL:http://code.google.com/p/econpy/source/browse/trunk/utilities/mso.
> py>
> 
> hth,
> Alan Isaac
> 
> 
> 
> 
> -----------------------------------------------------------------------
> --
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2008.
> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users

On Mon, 11 Feb 2008, Ted Drain apparently wrote:
> Does anyone know of a way to create a powerpoint slide from a plot? 

<URL:http://code.google.com/p/econpy/source/browse/trunk/utilities/mso.py>

hth,
Alan Isaac

Does anyone know of a way to create a powerpoint slide from a plot?  I'm
assuming that it's possible to have a script that savse a PNG of the plot
and then use a VB (or preferably python) script to create a slide (or append
that slide to an existing presentation).   

I've google'ed around but I'm having trouble finding a decent example of
doing this on the web.  Any examples would be greatly appreciated.

Thanks,
Ted

Slackenerny <sla...@pu...> writes:

>>>graph = f.add_subplot(...)
> I could help myself with
>> graph.get_xlim()
> So, how could I have helped myself, without annoying you? ;)

The commands getp(graph) and setp(graph) might have helped.

-- 
Jouni K. Seppänen
http://www.iki.fi/jks

Dear list
I am working to plot and compare distributions. For that I require the
grp2idx.m file to run boxplotC.m. Kindly help me get the request m file.
with thanks
Pushparaj
-- 
View this message in context: http://www.nabble.com/needed-grp2idx-tp15412798p15412798.html
Sent from the matplotlib - users mailing list archive at Nabble.com.

Hello Heiko -

dir(graph) would at least have given you a list of the functions and
attributes, so you may have been able to spot the get_xlim function.
I use that a lot,

Mark


>
> ------------------------------
>
> Date: Mon, 11 Feb 2008 14:14:03 +0100
> From: Slackenerny <sla...@pu...>
> Subject: Re: [Matplotlib-users] How to get current value of xlim/ylim?
> To: mat...@li...
> Message-ID: <161...@pu...>
> Content-Type: text/plain; charset=iso-8859-15
>
> Hi,
> I could help myself with
> > graph.get_xlim()
> which I found after finally guessing the right expressions for Google,
> but I wonder how I could have found it in the help() output...
> I've been searching that for quite sometime and didn't come up with
> anything...
> So, how could I have helped myself, without annoying you? ;)
>
> best wishes
>
>

On Feb 11, 2008 2:35 PM, Michael Droettboom <md...@st...> wrote:

> Before I look into this further: what version of mpl are you using?
>

I am using 0.91.2 using the win32 installer for Python 2.4.

Thanks for looking into this, Mark

Before I look into this further: what version of mpl are you using?

Mark Bakker wrote:
> I seem to have tracked down the problem.
> After calling the aspect_ratio function, the data limits don't get set.
> When a new axis with sharex is called, it gets the old data limits.
> After I call draw() or ax.draw() the datalimit gets set correctly.
> And creating a subplot with sharex works fine.
> Maybe the datalimit needs to be set at the end of the aspect_ratio function?
> (I presume that is part of the draw() command)
> Mark
> 
> from pylab import *
> 
> x,y = meshgrid(linspace(0,5,5),linspace(0,5,5))
> 
> figure()
> ax = subplot(211)
> ax.contour(x,y,x)
> ax.set_aspect('equal',adjustable='datalim')
> print ax.get_xlim()  # Prints 0 to 5 while datalimit is much larger
> draw()
> print ax.get_xlim()  # Now datalimit is correct and sharex works
> ax2 = subplot(212,sharex=ax)
> draw()
> 
> On Feb 11, 2008 9:56 AM, Mark Bakker <ma...@gm... 
> <mailto:ma...@gm...>> wrote:
> 
>     Hello -
> 
>     I have a hard time getting aspect_ratio to work correctly with sharex.
>     This used to work quite a while ago, and has been broken for a long
>     time (or at least I don't know how to get it to work)
>     But I finally found the time to put a simple example together to
>     determine if I do something wrong, or whether this can be fixed easily.
> 
>     When I make a small contour plot setting the aspect ratio equal
>     works fine:
> 
>     from pylab import *
> 
>     x,y = meshgrid(linspace(0,5,5),linspace(0,5,5))
> 
>     figure()
>     ax = subplot(211)
>     ax.contour(x,y,x)
>     ax.set_aspect('equal',adjustable='datalim')
>     draw()
> 
>     Note that the datalim on the x-axis is expanded, as the data limit
>     on the y-axis is the determining factor.
> 
>     If I now try to do the same thing while linking the x-axis of a
>     second subplot to the first one, then
>     the same call to set_aspect changes the data limit on the y-axis
>     while keeping the x-axis fixed.
>     That seems inconsistent and is not the behavior I want:
> 
>     figure()
>     ax = subplot(211)
>     ax.contour(x,y,x)
>     ax2 = subplot(212,sharex=ax)
>     ax.set_aspect('equal',adjustable='datalim')
>     draw()
> 
>     Any idea what I am doing wrong?
> 
>     Thanks, Mark
> 
> 
> 
> ------------------------------------------------------------------------
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2008.
> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Matplotlib-users mailing list
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-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA

You shouldn't edit rcsetup.py directly -- that is part of the matplotlib 
source code.  Instead, you should edit the matplotlibrc settings file.

In there, you'll actually want to change two settings:

  1) Add Cambria to the front of the font.serif list
  2) Set "font.family" to "serif", so that mpl will use that list.

Hope this helps,
Mike

chu...@ch... wrote:
> I would like to be able to use Cambria font  (http://en.wikipedia.org/wiki/Cambria_(typeface)) for all text on my charts. 
> 
> I am adding these charts to a MS Word 2007 document written in the same font.
> 
> I tried to add Cambria as the fist string in rcsetup.py | defaultParams | 'font.serif'.  That didn't work.  Can I use this font for the charts?
> 
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2008.
> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users

-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA

Hi,
I could help myself with
> graph.get_xlim()
which I found after finally guessing the right expressions for Google,
but I wonder how I could have found it in the help() output...
I've been searching that for quite sometime and didn't come up with
anything...
So, how could I have helped myself, without annoying you? ;)

best wishes

> Hello List,

> assume I'm creating a plot via
>>f = Figure(figsize=(5,4), dpi=100)
>>graph = f.add_subplot(111, autoscale_on=False, xlim=[4,50], ybound=-2)
>>graph.plot(x,y,"g--o", ms=5)
> then the user zooms around a little does this and that.
> Now I want to draw a second plot, which uses the new xlim and ylim
> values from the old plot (i.e. has the same scaling). How can read out
> those values?

> best wishes
> heiko



-- 
Mit freundlichen Grüßen
Slackenerny
mailto:sla...@pu...

Hello List,

assume I'm creating a plot via
>f = Figure(figsize=(5,4), dpi=100)
>graph = f.add_subplot(111, autoscale_on=False, xlim=[4,50], ybound=-2)
>graph.plot(x,y,"g--o", ms=5)
then the user zooms around a little does this and that.
Now I want to draw a second plot, which uses the new xlim and ylim
values from the old plot (i.e. has the same scaling). How can read out
those values?

best wishes
heiko

I seem to have tracked down the problem.
After calling the aspect_ratio function, the data limits don't get set.
When a new axis with sharex is called, it gets the old data limits.
After I call draw() or ax.draw() the datalimit gets set correctly.
And creating a subplot with sharex works fine.
Maybe the datalimit needs to be set at the end of the aspect_ratio function?
(I presume that is part of the draw() command)
Mark

from pylab import *

x,y = meshgrid(linspace(0,5,5),linspace(0,5,5))

figure()
ax = subplot(211)
ax.contour(x,y,x)
ax.set_aspect('equal',adjustable='datalim')
print ax.get_xlim()  # Prints 0 to 5 while datalimit is much larger
draw()
print ax.get_xlim()  # Now datalimit is correct and sharex works
ax2 = subplot(212,sharex=ax)
draw()

On Feb 11, 2008 9:56 AM, Mark Bakker <ma...@gm...> wrote:

> Hello -
>
> I have a hard time getting aspect_ratio to work correctly with sharex.
> This used to work quite a while ago, and has been broken for a long time
> (or at least I don't know how to get it to work)
> But I finally found the time to put a simple example together to determine
> if I do something wrong, or whether this can be fixed easily.
>
> When I make a small contour plot setting the aspect ratio equal works
> fine:
>
> from pylab import *
>
> x,y = meshgrid(linspace(0,5,5),linspace(0,5,5))
>
> figure()
> ax = subplot(211)
> ax.contour(x,y,x)
> ax.set_aspect('equal',adjustable='datalim')
> draw()
>
> Note that the datalim on the x-axis is expanded, as the data limit on the
> y-axis is the determining factor.
>
> If I now try to do the same thing while linking the x-axis of a second
> subplot to the first one, then
> the same call to set_aspect changes the data limit on the y-axis while
> keeping the x-axis fixed.
> That seems inconsistent and is not the behavior I want:
>
> figure()
> ax = subplot(211)
> ax.contour(x,y,x)
> ax2 = subplot(212,sharex=ax)
> ax.set_aspect('equal',adjustable='datalim')
> draw()
>
> Any idea what I am doing wrong?
>
> Thanks, Mark
>
>

Hello -

I have a hard time getting aspect_ratio to work correctly with sharex.
This used to work quite a while ago, and has been broken for a long time (or
at least I don't know how to get it to work)
But I finally found the time to put a simple example together to determine
if I do something wrong, or whether this can be fixed easily.

When I make a small contour plot setting the aspect ratio equal works fine:

from pylab import *

x,y = meshgrid(linspace(0,5,5),linspace(0,5,5))

figure()
ax = subplot(211)
ax.contour(x,y,x)
ax.set_aspect('equal',adjustable='datalim')
draw()

Note that the datalim on the x-axis is expanded, as the data limit on the
y-axis is the determining factor.

If I now try to do the same thing while linking the x-axis of a second
subplot to the first one, then
the same call to set_aspect changes the data limit on the y-axis while
keeping the x-axis fixed.
That seems inconsistent and is not the behavior I want:

figure()
ax = subplot(211)
ax.contour(x,y,x)
ax2 = subplot(212,sharex=ax)
ax.set_aspect('equal',adjustable='datalim')
draw()

Any idea what I am doing wrong?

Thanks, Mark

The following script creates a chart in pdf format. All the text on the chart is searchable. I need to create a chart which will be put in a MS Word 2007 document (as part of a much larger document) and then converted to a Pdf.  Which format should my chart be and which backend should I use? Thus far, I have been using Agg and putting in pngs...the quality is great but they are not searchable! Thanks.

=============================================
import matplotlib as ML
ML.use('Pdf')
import pylab as PL

fig = PL.figure()
ax1 = fig.add_subplot(111)

lstX = range(1,100)
lstY = map(lambda x:PL.sin(x/PL.pi),lstX)
ax1.plot(lstX, lstY, color=(0.87,0.0,0.0), lw=2, alpha=0.6)
ax1.set_ylabel('control of line styles, font properties, axes properties')
ax1.set_xlabel('trys to make easy things easy and hard things')

ax1.set_title('python 2D plotting library which produces', weight='bold', size='large')
fig.savefig('out', dpi=72)
=============================================