matplotlib-users Mailing List for matplotlib

I'm having issues importing matplotlib into my python script, but only 
when runing under PHP.

The line:
    from matplotlib import *

causes my .py script to return an error code "1" when being called from 
inside a PHP script.  However, the script runs just fine when called 
from the command line.

If i comment out the above line and all the matplotlib-related commands 
in my script, it will run just fine (but without plots of course).  But 
the include command alone is enough to cause an error 1 return.

I have been through every documentation source I can find, I've tried 
every variation of import i can think of, and I've come up with a big 
fat 0.  I've tried something like:
    sys.path.append("/usr/lib/python2.3/site-packages/matplotlib")
after the sys import and before the matplotlib import thinking there was 
a path issue with the apache user, and got jack squat out of that.

Has anyone else had issues calling python scripts from inside PHP?  All 
my other imports below:
# Module Imports
from optparse import OptionParser
import sys
#from matplotlib import *
from os import listdir
from string import split
from array import array
from time import time#, ctime

work just fine.  I've been on this for 3 solid days, someone either 
shoot me or help me! Thanks.

Flavio Codeco Coelho wrote:
> Hi John,
> 
> look at this strange bug in mathtext:
> 
> from matplotlib.matlab import *
>  >>> plot([1,2,3])
> [<matplotlib.lines.Line2D instance at 0x4120f4cc>]
>  >>> title(r'$\alpha=6.6$')
> <matplotlib.text.Text instance at 0x4120f46c>
>  >>> show()
> 
> 
> the two sixes  in the title are replaced by '&' resulting in: \alpha=&.&
> 
> I am running 0.54.2
> 
> thanks
> 	Flávio Codeço Coelho, PhD
> Programa de Computação Científica
> Fundação Oswaldo Cruz
> Rio de Janeiro -- Brasil 	
> 
> 
> ------------------------------------------------------------------------
> 

Yes.  While working on Postscript support for TrueType Fonts, I came across this 
bug.  It will be fixed in a future release.

  -- Paul

-- 
Paul Barrett, PhD      Space Telescope Science Institute
Phone: 410-338-4475    ESS/Science Software Branch
FAX:   410-338-4767    Baltimore, MD 21218

>>>>> "Rein" == Rein van den Boomgaard (UvA) <re...@sc...> writes:

    Rein> What is the prefered way to read in images in
    Rein> numarray/matplotlib?

No good way, currently.  I plan to add a PNG loader in the near
future.  Would this suffice for you?  What do you think are the core
set of image formats that matplotlib should support? ... the fewer the
better!

    Rein> I know of PIL but it seems like a lot of overlap with
    Rein> numarray just to read an image from file.

True, but for the record, here is the recipe I use to do the PIL ->
numerix conversion


import Image
from matplotlib.matlab import *

im = Image.open('../data/leo_ratner.jpg')
s = im.tostring()    # convert PIL image -> string

# convert string -> numerix array of floats
rgb = fromstring(s, UInt8).astype(Float)/255.0  

# resize to RGB array
rgb = resize(rgb, (im.size[1], im.size[0], 3))

imshow(rgb, interpolation='nearest')
axis('off')  # don't display the image axis
show()

I am preparing to install matplotlib on a Mac OS X system (10.3.4).  
The installation page says I need to install freetype2.

I already have Apple's X11 and X11sdk.  I noticed that /usr/X11R6/lib 
contains libfreetype.a and libfreetype.dylib (the latter is a pointer 
to libfreetype.6.3.dylib).

Is this what I need?  If so, how do I tell matplotlib to use it?


Also, if this is the same thing, any idea what "6.3" means in 
libfreetype.6.3.dylib?  The tar file I got from the freetype web site 
is named freetype-2.1.9.tar, so it doesn't appear to make sense as a 
version number.


Jeffrey Jones                       |   email:  
jef...@gs...
Code 975 - SSAI                     |   phone:  301.614.5721
NASA/Goddard Space Flight Center    |   FAX:    301.614.5558
Greenbelt, MD 20771 USA             |   office: Bldg 33, Rm B406

Howdy,

Is there an easy way to turn off the minor gridlines in a (semi)log
plot? I just want the ones that are at the powers of ten.

thanks,
Danny


		
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Hi,

Anyone is welcome to work on the SVG backend.  I didn't realize that
John thought I was hard at work on improving it, when actually I've been
happily using it.  Sorry for not communicating that... I'm not going to
have any time to work on it in the near future, so go nuts.  I'm an
amateur, so there are plenty of bugs!  :)

On Thu, 2004-07-08 at 16:16, John Hunter wrote:

> There is an SVG backend already in matplotlib.  It hasn't been
> announced because it is in development by Jared Wahlstrand.  Perhaps
> Jared can give a status report on what needs to be done, and you might
> want to help out.  He might have a more recent copy in his development
> tree than I do.
> 
> Here are the issues as I understand them:
> 
>   * image support

This is waiting on a save_image function in the Agg backend, so that we
can link to an external PNG file.

>   * font support (freetype vs afm), use of font families /
>     font_manager

Is this the issue of 'helvetica' versus 'sans serif'?

>   * mathtext

I don't know where to begin here, but the implementation is going to
look a lot like the PS backend.  It would be cool to embed MathML, but
good luck finding a viewer capable of reading it... :)

>   * some oddness when the user calls savefig with a high dpi?
>     Shouldn't SVG ignore the dpi setting?  That's what I did in
>     backend_ps.

You're right, it shouldn't need to know the dpi.  This is an artifact
from when I ported everything from the PS backend.

>   * There also appears to be some problem in centering the figure?

I haven't experienced this.

I've been using it to export to inkscape to make figures for papers and
conference talks and haven't had any major problems.  The code in 0.60
is the same as I've been using, with the exception of adding another
case to print_figure() to switch to the SVG backend when the filename
has a .svg extension.

It's not complicated code, so it should be easy to understand, but let
me know if you have any questions.

Cheers,

Jared

>>>>> "Eric" == Eric Jonas <jo...@co...> writes:

    >> touch bitmap figures again. I could do entire conference
    >> posters in SVG!  If Justin's not interested and would accept a
    >> patch, I might be willing to try and tackle this...

    Eric>  By which of course I mean John, or perhaps Dr. Hunter...

John works for me :-)

There is an SVG backend already in matplotlib.  It hasn't been
announced because it is in development by Jared Wahlstrand.  Perhaps
Jared can give a status report on what needs to be done, and you might
want to help out.  He might have a more recent copy in his development
tree than I do.

Here are the issues as I understand them:

  * image support

  * font support (freetype vs afm), use of font families /
    font_manager

  * mathtext

  * some oddness when the user calls savefig with a high dpi?
    Shouldn't SVG ignore the dpi setting?  That's what I did in
    backend_ps.

  * There also appears to be some problem in centering the figure?

I've only been testing this a bit - my SVG viewer doesn't seem to work
too well.

JDH

> touch bitmap figures again. I could do entire conference posters in SVG!
> If Justin's not interested and would accept a patch, I might be willing
> to try and tackle this... 
 By which of course I mean John, or perhaps Dr. Hunter... 
             ...Eric

I second this question / request. The inkscape (inkscape.org) people are
making a full-featured Illustrator-like replacement for vector
illustration, and if matplotlib could generate SVGs, I'd never have to
touch bitmap figures again. I could do entire conference posters in SVG!
If Justin's not interested and would accept a patch, I might be willing
to try and tackle this...=20
			...Eric


On Thu, 2004-07-08 at 11:53, Flavio Codeco Coelho wrote:
> Hi,
>=20
> Is there a way to save vectorial figs? AGG is a vectorial renderer so
> at least for this backend it should be possible...
>=20
> Fl=C3=A1vio Code=C3=A7o Coelho,
> PhD
> Programa de Computa=C3=A7=C3=A3o
> Cient=C3=ADfica
> Funda=C3=A7=C3=A3o Oswaldo Cruz
> Rio de Janeiro --
> Brasil
>=20
>=20
> ______________________________________________________________________