matplotlib-users Mailing List for matplotlib

We are pleased to announce the first public beta release of APLpy, a python
module that makes it easy to interactively produce publication-quality plots
of astronomical images in FITS format. More details are available at

                   http://aplpy.sourceforge.net/

>From the front page you can sign up to the mailing list and/or the Twitter
feed to be kept up-to-date on future releases.

About APLpy
===========

APLpy (pronounced 'apple pie') can be used to:

     * Interactively or non-interactively produce publication-quality plots;
     * Show grayscale, colorscale, and 3-color RGB images;
     * Overlay any number of contour and marker sets;
     * Dynamically hide, show, and remove contour and marker layers;
     * Overlay coordinate grids;
     * Customize the appearance of labels and ticks;
     * Use LaTeX to typeset labels;
     * Pan, zoom, and save any view as a full publication-quality plot;
     * Save plots as EPS, PS, PDF, SVG, or PNG files;

Noting that APLpy is still in beta development, you may encounter bugs and/or
missing features. If this is the case, please let us know either by emailing
us at ast...@gm..., or by leaving a bug report or feature request in
the forums at:

                http://apps.sourceforge.net/phpbb/aplpy

Cheers,

Eli Bressert and Thomas Robitaille

On Tue, Apr 28, 2009 at 8:21 AM, Thomas Robitaille <
tho...@gm...> wrote:

> Hi,
>
> I was wondering if it is possible to override the 'save' button in
> wxAgg so that once a filename has been specified in the dialog, a
> custom function is run instead of the default savefig? Maybe this
> would require too much hacking?



You could probably override the
matplotlib.backends.backend_wx.NavigationToolbar2.save function.  If you are
using pylab/pyplot, this function is accessible as

  In [3]: fig.canvas.manager.frame.toolbar.save
  Out[3]: <bound method NavigationToolbar2WxAgg.save of
<matplotlib.backends.backend_wxagg.NavigationToolbar2WxAgg; proxy of <Swig
Object of type 'wxToolBar *' at 0x3b5bc60> >>

and has the signature::

    def save(self, evt):

where evt is the GUI event that generated the callback (can safely be
ignored).

If you are embedding mpl in wx directly, you can create your own toolbar as
in the embedding_in_wx* examples at

  http://matplotlib.sourceforge.net/examples/user_interfaces/index.html

JDH

On Tue, Apr 28, 2009 at 9:51 AM, Jouni K. Seppänen <jk...@ik...> wrote:

> Bala subramanian <bal...@gm...> writes:
>
> > Meanwhile i would like to know. Suppose if i install the latest mpl that
> i
> > just downloaded, will it overwrite the mpl version 0.98.1 previously
> > installed with yum ? If not, when i give ipython -pylab, which version
> will
> > be loaded, I mean which version would be my default.
>

The yum version will be installed into something like
/usr/lib/python2.5/site-packages/ and the version you install yourself will
be put (by default) into  /usr/local/lib/python2.5/site-packages/ (you can
control this with the --prefix option to "python setup.py install").  If the
/use/local version is in your PYTHONPATH before the /usr/lib version, you
will get the newer version.  You can check this by doing


  >>> import matplotlib
  >>> print matplotlib.__version__
  >>> print matplotlib.__file__


JDH

Bala subramanian <bal...@gm...> writes:

> Meanwhile i would like to know. Suppose if i install the latest mpl that i
> just downloaded, will it overwrite the mpl version 0.98.1 previously
> installed with yum ? If not, when i give ipython -pylab, which version will
> be loaded, I mean which version would be my default.

That will depend on how Python is configured in Fedora (I have no idea)
and what command-line options you use when you install matplotlib. See

http://docs.python.org/install/

for the details.

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

Hi,
Thank you. I will install the headers and try again.

Meanwhile i would like to know. Suppose if i install the latest mpl that i
just downloaded, will it overwrite the mpl version 0.98.1 previously
installed with yum ? If not, when i give ipython -pylab, which version will
be loaded, I mean which version would be my default.

Bala


On Tue, Apr 28, 2009 at 3:32 PM, Sandro Tosi <mo...@de...> wrote:

> On Tue, Apr 28, 2009 at 15:26, Bala subramanian
> <bal...@gm...> wrote:
> > Hi,
> > I think freetype is already installed in Fedora10. When i search yum as
>
> I said freetype2 *headers*, those files needed for development, not
> runtime support. Install the according packages for your distribution.
>
> --
> Sandro Tosi (aka morph, morpheus, matrixhasu)
> My website: http://matrixhasu.altervista.org/
> Me at Debian: http://wiki.debian.org/SandroTosi
>

Bala subramanian <bal...@gm...> writes:

> I think freetype is already installed in Fedora10. When i search yum as
> follows, yum says freetype is installed already.

You probably need to install a package named freetype-devel (or
something like that) to get the freetype headers you need for compiling
matplotlib.

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

On Tue, Apr 28, 2009 at 15:26, Bala subramanian
<bal...@gm...> wrote:
> Hi,
> I think freetype is already installed in Fedora10. When i search yum as

I said freetype2 *headers*, those files needed for development, not
runtime support. Install the according packages for your distribution.

-- 
Sandro Tosi (aka morph, morpheus, matrixhasu)
My website: http://matrixhasu.altervista.org/
Me at Debian: http://wiki.debian.org/SandroTosi

Hi,
I think freetype is already installed in Fedora10. When i search yum as
follows, yum says freetype is installed already.

*[root@ramana cbala]# yum info freetype*
Loaded plugins: refresh-packagekit
Installed Packages
Name       : freetype
Arch       : i386
Version    : 2.3.7
Release    : 1.fc10
Size       : 704 k
Repo       : installed
Summary    : A free and portable font rendering engine
URL        : http://www.freetype.org
License    : FTL or GPLv2+
Description: The FreeType engine is a free and portable font rendering
engine, developed to provide advanced font support for a variety of
           : platforms and environments. FreeType is a library which can
open and manages font files as well as efficiently load, hint and
           : render individual glyphs. FreeType is not a font server or a
complete text-rendering library.

Bala

On Tue, Apr 28, 2009 at 3:10 PM, Sandro Tosi <mo...@de...> wrote:

> On Tue, Apr 28, 2009 at 14:46, Bala subramanian
> <bal...@gm...> wrote:
> > [root@ramana matplotlib-0.98.5.2]# python setup.py build
> > In file included from src/ft2font.cpp:1:
> > src/ft2font.h:31: error: ‘FT_Bitmap’ has not been declared
> > src/ft2font.h:31: error: ‘FT_Int’ has not been declared
> > src/ft2font.h:31: error: ‘FT_Int’ has not been declared
>
> you're probably missing freetype2 headers. Please install all the
> needed development packages required to  build mpl. Check the
> matplotlib documentation about building from source or the packages
> used in building the Debian packages (for example).
>
> Regards,
> --
> Sandro Tosi (aka morph, morpheus, matrixhasu)
> My website: http://matrixhasu.altervista.org/
> Me at Debian: http://wiki.debian.org/SandroTosi
>

Hi,

I was wondering if it is possible to override the 'save' button in  
wxAgg so that once a filename has been specified in the dialog, a  
custom function is run instead of the default savefig? Maybe this  
would require too much hacking?

Thanks for any advice,

Thomas

On Tue, Apr 28, 2009 at 14:46, Bala subramanian
<bal...@gm...> wrote:
> [root@ramana matplotlib-0.98.5.2]# python setup.py build
> In file included from src/ft2font.cpp:1:
> src/ft2font.h:31: error: ‘FT_Bitmap’ has not been declared
> src/ft2font.h:31: error: ‘FT_Int’ has not been declared
> src/ft2font.h:31: error: ‘FT_Int’ has not been declared

you're probably missing freetype2 headers. Please install all the
needed development packages required to  build mpl. Check the
matplotlib documentation about building from source or the packages
used in building the Debian packages (for example).

Regards,
-- 
Sandro Tosi (aka morph, morpheus, matrixhasu)
My website: http://matrixhasu.altervista.org/
Me at Debian: http://wiki.debian.org/SandroTosi

Hi Jouni,

Thanks for your help! Following what you suggested, I've decided to use

ax.text(0.5,-0.13,xlabel,transform  
=ax.transAxes,ha='center',va='center')

Thanks,

Thomas

On 28 Apr 2009, at 01:39, Jouni K. Seppänen wrote:

> Thomas Robitaille <tho...@gm...> writes:
>
>> This is probably a simple question, but what is the best way to
>> control the vertical positioning of the x-axis label?
>
> Matplotlib tries to set the vertical position automatically based on  
> how
> tall the tick labels are - see how e.g. the commands
>
> setp(getp(gca(), 'xticklabels'), fontsize=2)
> setp(getp(gca(), 'xticklabels'), fontsize=10)
> setp(getp(gca(), 'xticklabels'), fontsize=20)
>
> affect the position. If you're not happy with that, I think your best
> bet is to use figtext instead of xlabel, and perhaps file a bug in the
> matplotlib tracker, explaining how the current positioning is
> insufficient for your needs.
>
> -- 
> Jouni K. Seppänen
> http://www.iki.fi/jks
>
>
> ------------------------------------------------------------------------------
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Friends,
I installed matplotlib in Fedora10 using yum which installed the version
0.98.1  .I could nt upgrade matplotlib using yum.
Hence i downloaded the source and tried to install but i am getting the
following error. Kindly write me what is going wrong.

[root@ramana matplotlib-0.98.5.2]# python setup.py build
In file included from src/ft2font.cpp:1:
src/ft2font.h:31: error: ‘FT_Bitmap’ has not been declared
src/ft2font.h:31: error: ‘FT_Int’ has not been declared
src/ft2font.h:31: error: ‘FT_Int’ has not been declared
src/ft2font.h:77: error: expected ‘,’ or ‘...’ before ‘&’ token
src/ft2font.h:77: error: ISO C++ forbids declaration of ‘FT_Face’ with no
type
src/ft2font.h:83: error: expected ‘,’ or ‘...’ before ‘&’ token
src/ft2font.h:83: error: ISO C++ forbids declaration of ‘FT_Face’ with no
type
src/ft2font.h:122: error: ‘FT_Face’ does not name a type
src/ft2font.h:123: error: ‘FT_Matrix’ does not name a type
src/ft2font.h:124: error: ‘FT_Vector’ does not name a type
src/ft2font.h:125: error: ‘FT_Error’ does not name a type
src/ft2font.h:126: error: ‘FT_Glyph’ was not declared in this scope
src/ft2font.h:126: error: template argument 1 is invalid
src/ft2font.h:126: error: template argument 2 is invalid
src/ft2font.h:127: error: ‘FT_Vector’ was not declared in this scope
src/ft2font.h:127: error: template argument 1 is invalid
src/ft2font.h:127: error: template argument 2 is invalid
src/ft2font.h:133: error: ‘FT_BBox’ does not name a type
src/ft2font.cpp:46: error: ‘FT_Library’ does not name a type
src/ft2font.cpp:97: error: variable or field ‘draw_bitmap’ declared void
src/ft2font.cpp:97: error: ‘FT_Bitmap’ was not declared in this scope
src/ft2font.cpp:97: error: ‘bitmap’ was not declared in this scope
src/ft2font.cpp:98: error: ‘FT_Int’ was not declared in this scope
src/ft2font.cpp:99: error: ‘FT_Int’ was not declared in this scope
/usr/lib/python2.5/site-packages/numpy/core/include/numpy/__multiarray_api.h:958:
warning: ‘int _import_array()’ defined but not used
error: command 'gcc' failed with exit status 1

Bala

Hi,

I was nt running any script of my own. This warning came when i was working
on matplotlib-pyplot tutorials (simple plot and multiple line plots).

Bala

On Mon, Apr 27, 2009 at 10:42 PM, Sandro Tosi <mo...@de...> wrote:

> On Mon, Apr 27, 2009 at 15:18, Bala subramanian
> <bal...@gm...> wrote:
> > Hi,
> >
> > Version informations
> > Python 2.5.2
> > IPython 0.8.4
> > matplotlib 0.98.1
>
> this is a rather old version, you might want to try to upgrade to
> 0.98.5.2 or a near release.
>
> > backend GTKAgg
> > Running on Fedora10
>
> could you please provide a simple script (along with configuration
> files that applies to your executions) to replicate the issue? I can
> speculate there some GUI mixture, but with code in front it's easier
> :)
>
> Cheers,
> --
> Sandro Tosi (aka morph, morpheus, matrixhasu)
> My website: http://matrixhasu.altervista.org/
> Me at Debian: http://wiki.debian.org/SandroTosi
>

Thomas Robitaille <tho...@gm...> writes:

> This is probably a simple question, but what is the best way to  
> control the vertical positioning of the x-axis label? 

Matplotlib tries to set the vertical position automatically based on how
tall the tick labels are - see how e.g. the commands

setp(getp(gca(), 'xticklabels'), fontsize=2)
setp(getp(gca(), 'xticklabels'), fontsize=10)
setp(getp(gca(), 'xticklabels'), fontsize=20)

affect the position. If you're not happy with that, I think your best
bet is to use figtext instead of xlabel, and perhaps file a bug in the
matplotlib tracker, explaining how the current positioning is
insufficient for your needs.

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

Hi,

This is probably a simple question, but what is the best way to  
control the vertical positioning of the x-axis label? I tried:

import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as mpl

fig = mpl.figure()
ax = fig.add_subplot(111)
ax.set_xlabel("Hello",position=(0.5,-0.2))
fig.savefig('test.png')

But this doesn't work. Strangely, changing the first position element  
does shift the label left and right, but changing the second does not  
move the label vertically.

I'm using matplotlib 0.98.5.2

Thanks for any advice!

Thomas