matplotlib-users — Discussion related to using matplotlib

RE: [Matplotlib-users] not showing navigation controls

[Brian S. <bs...@ad...>]

> -----Original Message-----
> From: John Hunter [mailto:jdh...@ac...] 
> Sent: Saturday, July 10, 2004 9:28 AM
> To: bs...@ad...
> Cc: mat...@li...
> Subject: Re: [Matplotlib-users] not showing navigation controls
> 
> 
> >>>>> "Brian" == Brian Sturk <bs...@ad...> writes:
> 
>     Brian> Is it possible to hide this in a plot?  I checked the FAQ,
>     Brian> the archived messages, and the class lib docs and couldn't
>     Brian> seem to find a way to.  ~brian
> 
> Which backend are you using?
> 
> JDH

I believe I was using the default (seemed like Tkinter).  I will end up
using this with wxPython if I can.

thanks for responding...
~brian

-- 
.--------------------------------------------------,--------.
| Brian Sturk - http://users.adelphia.net/~bsturk \  C/C++  |
|-------------------------. bsturk<AT>adelphia.net | Python |
| http://www.telengard.com `------------------------`-------|
| Telengard Technologies Inc. - NT/*nix UI & device drivers |
`-----------------------------------------------------------'

Re: [Matplotlib-users] new embedding_in_wx3 example

[John H. <jdh...@ac...>]

>>>>> "Andrew" == Andrew Straw <str...@as...> writes:

    Andrew> Hi All, I've added a new example, embedding_in_wx3, to
    Andrew> CVS.  From the docstring:

Coincidentally, I was also working on a different embedding_in_wx3
which shows how to use a custom toolbar, in response to another
question off list.  I changed the name submitted that as
embedding_in_wx4 :-)

    Andrew> John+Perry+whoever: the only matplotlib bug I found this
    Andrew> time is worked around by the line

    >> rcParams['image.origin'] = 'upper' # 'lower': nav toolbar
    >> problem -ADS

    Andrew> We should fix that at some point.

What was the bug?  I didn't notice any problems with lower.

BTW, the recommended way to set rc params in now with the rc command.
This was initially defined in matplotlib.matlab but I just moved it to
matplotlib.__init__.py to make it accessible to application
developers.  You can do

  matplotlib.rc('image', origin='lower')

and set multiple image params with multiple kwargs.

        self.toolbar.update() # Not sure why this is needed - ADS

This updates the Axes menu on the toolbar, which is needed if the
number of axes have changed.  Since the number of axes/subplots can
change after the figure/toolbar was created, this tells the toolbar to
update it's axes menu.

Another comment: try not to use x.resize in matplotlib examples,
because of the Numeric bug (did you get the emails Todd and I
exchanged regarding this?).  Numeric segfaulted for me when I
initially ran your example with the .resize command.

Note that matplotlib.mlab has the meshgrid command for building mesh
arrays from 2 1D vectors.  I replaced your code with

        x = numerix.arange(120.0)*2*numerix.pi/60.0
        y = numerix.arange(100.0)*2*numerix.pi/50.0
        self.x, self.y = meshgrid(x, y)
        z = numerix.sin(self.x) + numerix.cos(self.y)


Finally, there seems to be a figure size problem on linux: when I run
your example the figure window is too small and the image wraps.

Updates are in CVS - thanks for the submission.

JDH

[Matplotlib-users] new embedding_in_wx3 example

[Andrew S. <str...@as...>]

Hi All,

I've added a new example, embedding_in_wx3, to CVS.  From the docstring:

> This is yet another example of using matplotlib with wx.  Hopefully
> this is pretty full-featured:
>
>   - both matplotlib toolbar and WX buttons manipulate plot
>   - full wxApp framework, including widget interaction
>   - XRC (XML wxWidgets resource) file to create GUI (made with XRCed)
>
> This was derived from embedding_in_wx and dynamic_image_wxagg.
>
> Thanks to matplotlib and wx teams for creating such great software!


John+Perry+whoever: the only matplotlib bug I found this time is worked 
around by the line

> rcParams['image.origin'] = 'upper' # 'lower': nav toolbar problem -ADS

We should fix that at some point.

Cheers!
Andrew

Re: [Matplotlib-users] not showing navigation controls

[John H. <jdh...@ac...>]

>>>>> "Brian" == Brian Sturk <bs...@ad...> writes:

    Brian> Is it possible to hide this in a plot?  I checked the FAQ,
    Brian> the archived messages, and the class lib docs and couldn't
    Brian> seem to find a way to.  ~brian

Which backend are you using?

JDH

Re: [Matplotlib-users] dynamic image demo: suggestions sought

[Andrew S. <str...@as...>]

John Hunter wrote:

>>>>>>"John" == John Hunter <jdh...@ac...> writes:
>>>>>>            
>>>>>>
>
>    John> Haven't had a chance to test your example yet but hopefully
>    John> I can take a look tomorrow.  I haven't done much memory leak
>    John> testing against the _image module yet so this will be a good
>    John> opportunity.  I very recently rewrote _image.cpp using cxx.
>    John> I trust you have a fresh CVS checkout?
>
>Hi Andrew - found and fixed the memory leak.  Can't really call it a
>leak - more like a "memory gusher".  This was in the agg (and image)
>  
>
That makes a HUGE difference -- great!

>I made a number of comments in your example to point out places where
>you probably should be using matplotlib a little differently.
>  
>
OK, I see I have a lot of learning to do!  It's a lot cleaner now, but I 
left comments in for "common pitfalls to avoid when embedding in wx" 
enthusiasts.

>Please add it to CVS.
>  
>
Done.

>I liked the example so much I made an analogous one dynamic_image_gtk.
>  
>
Cool!  The GTK demo is nice because of the simplicity allowed by not 
embedding in a foreign GUI, but mainly using the matplotlib interface.

>It's faster than wxagg (13FPS vs 4FPS on my system) which is not
>surprising since gtkagg has extension code to transfer agg to the GUI
>canvas, 
>
It's even less surprising given that the wxagg app is driven by a timer 
callback set to run at 5 FPS! :)

>and doesn't flicker.  Very nice!  I would really like to get
>that wxagg flicker problem figured out, and the extension code
>added...  Did I hear you volunteering to be the wxagg maintainer :-)?
>  
>
Well, I'll hopefully have a chance to poke around in wxagg once in a 
while, but "maintainer" may be a bit grandiose for my time availability 
in the forseeable futurue...

Cheers!
Andrew

[Matplotlib-users] not showing navigation controls

[Brian S. <bs...@ad...>]

Is it possible to hide this in a plot?  I checked the FAQ, the archived messages, and the class lib docs and couldn't seem to find a way to.

~brian

Re: [Matplotlib-users] get_sfnt_name

[John H. <jdh...@ac...>]

>>>>> "esatel" == esatel  <eli...@pa...> writes:

    esatel> Hi. Am a new user, running Enthought Python23 on Windows
    esatel> XP. I am trying to run the simple_plot and subplot_demo.py
    esatel> examples. I am getting the error message below regardless
    esatel> of which backend I use. Am I doing something wrong in the
    esatel> configuration?  Thanks Eli

No. we're doing something wrong.

There was a bug in the font manager in the 0.60.1 release.  matplotlib
searches your computer for fonts and stores the results in a cache
table on the filesystem.  Regular users of matplotlib (like me!) have
a cache table already built and so did not find the bug in prerelease
tests.  New users (like you) will experience the bug when you first
load matplotlib.

I've uploaded a 0.60.2 matplotlib release to the sourceforge site that
fixes the bug.  This includes the src distributions and the windows
distribution for Numeric (which should work fine with the enthought
edition of python).  The numarray/matplotlib builds for win32 will be
up as soon as we can get them done.

Sorry for the trouble,
JDH

[Matplotlib-users] get_sfnt_name

[esatel <eli...@pa...>]

Hi. Am a new user, running Enthought Python23 on Windows XP. I am trying to 
run the simple_plot and subplot_demo.py examples. I am getting the error 
message below regardless of which backend I use. Am I doing something wrong 
in the configuration?
Thanks
Eli

C:\Python23\Lib\site-packages\matplotlib>python subplot_demo.py
Traceback (most recent call last):
   File "subplot_demo.py", line 1, in ?
     from matplotlib.matlab import *
   File "C:\Python23\Lib\site-packages\matplotlib\matlab.py", line 142, in ?
     from axes import Axes
   File "C:\Python23\Lib\site-packages\matplotlib\axes.py", line 10, in ?
     from axis import XTick, YTick, XAxis, YAxis
   File "C:\Python23\Lib\site-packages\matplotlib\axis.py", line 20, in ?
     from font_manager import FontProperties
   File "C:\Python23\Lib\site-packages\matplotlib\font_manager.py", line 
918, in ?
     fontManager = FontManager()
   File "C:\Python23\Lib\site-packages\matplotlib\font_manager.py", line 
763, in __init__
     self.ttfdict = createFontDict(self.ttffiles)
   File "C:\Python23\Lib\site-packages\matplotlib\font_manager.py", line 
410, in createFontDict
     prop = ttfFontProperty(font)
   File "C:\Python23\Lib\site-packages\matplotlib\font_manager.py", line 
224, in ttfFontProperty
     sfnt2 = font.get_sfnt_name(2)
AttributeError: get_sfnt_name

Re: [Matplotlib-users] SVG figs

[Jared W. <wah...@um...>]

For a start, you can replace 'PS' with 'SVG' in pstest.py in the
examples.  Otherwise, any of the examples that don't have mathtext or
images should work.  Just add

import matplotlib
matplotlib.use('SVG')

at the beginning and then

savefig('myfilename')

at the end.

jared

On Fri, 2004-07-09 at 06:59, Flavio Codeco Coelho wrote:
> So...
>=20
> can we type=20
>=20
> matplotlib.use('SVG')=20
>=20
> and start playing with it or what?
>=20
> what about some examples?;)
>=20
>=20
>=20
>=20
> Fl=C3=A1vio Code=C3=A7o Coelho,
> PhD
>=20
> Programa de Computa=C3=A7=C3=A3o
> Cient=C3=ADfica
>=20
> Funda=C3=A7=C3=A3o Oswaldo Cruz
>=20
> Rio de Janeiro --
> Brasil
>=20
>=20
>=20
>=20
>=20
>=20
> ______________________________________________________________________

Re: [Matplotlib-users] legend bug

[Peter G. <pgr...@ge...>]

John Hunter wrote:

>I hesitate to call this a bug.  I have been hard at work on the
>matplotlib.mind_reading module but it is incomplete.  
>  
>
c'mon John... it's about time you this thing done! );

-- 
Peter Groszkowski         Gemini Observatory
Tel: +1 808 974-2509      670 N. A'ohoku Place
Fax: +1 808 935-9235      Hilo, Hawai'i 96720, USA

Re: [Matplotlib-users] legend bug

[Andrew B. <be...@da...>]

Hi - By passing the list of lines, the problem is solved, thanks!  It
is the case though that the intelligent guess does fail when you do an
'errorbar plot' sequence but not when you do a 'plot errorbar'
sequence.  In this first case, the legend associated with the 'plot'
is always a straight black line no matter what the requested format.

Thanks for the help,
/\

ps. am using matplotlib-0.60.1

Re: [Matplotlib-users] legend bug

[John H. <jdh...@ac...>]

   becker> however the legend is incorrect/incomplete if i change the order the
   becker> plots are done

>    sp = matlib.subplot(111)
>    ctio  = sp.errorbar(jd, f, yerr=df, fmt='bo', ecolor='k', capsize=1)
>    mlfit = sp.plot(mljd, mlflux, 'r-')
>    snfit = sp.plot(mljd, mlflux, 'g-')
>    sp.legend( ('ML fit', 'SN fit', 'CTIO'), loc='upper right')

I hesitate to call this a bug.  I have been hard at work on the
matplotlib.mind_reading module but it is incomplete.  That is,
matplotlib does not know what you want the legend to look like, you
have to tell it.

It does try to make an intelligent guess if you don't tell it, and it
guesses by assuming the order the labels you give is the same as the
order of the plot commands.  If you want otherwise, you need to pass
it an explicit list of line or patch handles.  Something like

    # errorbar returns two values, the plot line and the list of
    # errorbar lines
    ctio, errlines  = sp.errorbar(jd, f, yerr=df, fmt='bo', ecolor='k', capsize=1)

    # note the comma in the return value.  plot returns *a list of
    # lines*.  Since you have a length one list, I'm extracting the
    # first element of the list using tuple unpacking
    mlfit, = sp.plot(mljd, mlflux, 'r-')
    snfit, = sp.plot(mljd, mlflux, 'g-')


    # by passing a list of lines, you can control the order
    sp.legend( (mlfit, snfit, ctio), ('ML fit', 'SN fit', 'CTIO'), loc='upper right')


See http://matplotlib.sf.net/examples/legend_demo2.py for an example;
all the examples can also be found in the examples subdirectory of the
matplotlib src distribution, *.tar.gz or *.zip.

Hope this helps,
JDH

Re: [Matplotlib-users] freetype2 and Mac OS X

[John H. <jdh...@ac...>]

>>>>> "Jeffrey" == Jeffrey Jones <Jef...@gs...> writes:

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

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

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

In setuptext.py, there is a dictionary called basedirs, whose keys are
your sys.platform and values are a list of base dirs to search for
includes. libraries etc.  That is how you set it.

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

I think you'll have the greatest chance of success if you compile
zlib, libpng and freetype2 from src and install them to /usr/local,
and then make sure /usr/local is in your basedirs path, preferably
before any fink stuff.  If you do that, and make sure you have a
working X11 and GUI backend installed (if you want a GUI, you'll need
a working Tkinter, pygtk or wxpython), then your install should go
fairly smoothly).

There have been a number of posts on the users and development mailing
lists posting build notes for OS X.  Unfortunately, the sourceforge
mailing list search capability is about the worst I've ever seen.
Here's one link -
http://sourceforge.net/mailarchive/message.php?msg_id=8799801.

I have an darwin laptop and managed to get every backend installed,
including gtkagg.  I had to install all the gtk components from src,
piece-by-piece.  I initially used fink but kept getting stuck at
various points (gtk, scipy) and eventually gave up and went old
school, doing everything from src.  If you are a fink user and don't
need the latest features, I believe there is a matplotlib fink
package; google for matplotlib fink.

Good luck, please post your compile notes with success and complaints
otherwise.

JDH

Re: [Matplotlib-users] easy way to turn off minor gridlines in log plot

[John H. <jdh...@ac...>]

>>>>> "danny" == danny shevitz <dan...@ya...> writes:

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

Not currently.

Technically, there are not major and minor ticks for the default log
tick locator and formatter, there are only major ticks and the decades
are labeled.  It is on my list of things to do to break these into
major and minor ticks.  At that point it will be fairly easy to turn
on and off the grids separately for the major and minor ticks.

If you want to look into this, the relevant code is LogLocator and
LogFormatter in matplotlib.ticker.py.  It should be fairly easy to
modify this code to support major and minor ticks separately.

JDH

[Matplotlib-users] Building RPMs

[<cf...@th...>]

It's bothered me a little that I couldn't build an rpm of matplotlib, so I resolved to work it out this time. These are the issues I had:

setup.py imports gtk while checking backend compatablity. This fails because the gtk module won't load if the DISPLAY variable is not set. The trouble lies in /usr/lib/rpm/redhat/macros on my system, and commenting out the unset DISPLAY lines does the trick. That whole section of the file is identified as slightly superfluous by the comments, if I'm reading them right. I'm not very handy with rpm macros.

A known distutils issue causes the procedure to complain all the way at the end, about there being the wrong number of files in the rpm. There are three ways to fix it that I found:

1) Ignore it. The rpm is built, but not copied into the dist directory. Get it from build/bdist.linux-i686/rpm/RPMS, or as appropriate for your platform.

2) Apply a distutils patch: https://sourceforge.net/tracker/?func=detail&atid=305470&aid=731328&group_id=5470. I haven't actually tried it.

3) Add this line to your ~/.rpmmacros: %debug_package %{nil}. You will get a much larger rpm. It looks like the binaries have debugging information included.

Chris Fuller

[Matplotlib-users] ANN matplotlib-0.60.1

[John H. <jdh...@ac...>]

What's new in matplotlib-0.60.1

 * figure images (pixel-by-pixel, not resampled) with the figimage
   command.  Multiple figure images (ie mosaics) with alpha blending
   are supported.  See
   http://matplotlib.sf.net/examples/figimage_demo.py

 * multiple axes images with imshow using alpha blending.  See
   http://matplotlib.sf.net/screenshots.html#layer_images

 * unified color limit and color mapping arguments to pcolor, scatter,
   imshow and figimage.  Interactive control of colormap and color
   scaling with new matplotlib.matlab commands jet, gray and clim.
   New matplotlib rc parameters for default image params.  image
   origin can be upper or lower - see
   http://matplotlib.sf.net/examples/image_origin.py

 * colorbar -
   http://matplotlib.sf.net/matplotlib.matlab.html#-colorbar - now
   works with imshow, pcolor, and scatter

 * new 'draw' command to redraw the figure - use this in place of
   multiple calls to show.  This is equivalent to doing
   get_current_fig_manager().canvas.draw(), but takes less typing :-)

 * support for py2exe - see
   http://matplotlib.sf.net/py2exe_examples.zip

 * New finance demo shows off many of the features of matplotlib - see
   screenshot at
   http://matplotlib.sf.net/screenshots.html#finance_work2

 * new matplotlib.matlab command 'rc' for dynamic control of rc
   parameters.  See
   http://matplotlib.sf.net/matplotlib.matlab.html#-rc and example
   http://matplotlib.sf.net/examples/customize_rc.py

 * Andrew Straw submitted a dynamic_image example.  The wx version is
   still in progress and has some flicker problems, but the gtk version
   is pretty cool - 
   http://matplotlib.sf.net/examples/dynamic_image_gtkagg.py

 * Bug fixes: dynamic_demo_wx, figure legends, memory leaks, axis
   scaling bug related to singleton plots, mathtext bug for '6', some
   numarray bug workarounds

See http://matplotlib.sf.net/CHANGELOG for details

Downloads at http://sourceforge.net/projects/matplotlib

Enjoy!
JDH

Re: [Matplotlib-users] Matplotlib import issues in PHP

[Peter G. <pgr...@ge...>]

You can always do this by adding:

SetEnv PYTHONPATH /locations/of/packages/want/to/import/

to your apache config file.

-- 
Peter Groszkowski         Gemini Observatory
Tel: +1 808 974-2509      670 N. A'ohoku Place
Fax: +1 808 935-9235      Hilo, Hawai'i 96720, USA



Rodrigo Caballero wrote:

> I did some python CGI scripting at one point, and I needed to do 
> something like
>
> os.environ['MATPLOTLIBDATA'] = '/where/matplotlib/lives'
>
> before  the matplotlib import ... hope that helps,
>
> rodrigo
>
> ---
>
> Rodrigo Caballero Augi (http://geosci.uchicago.edu/~rca)
> Research Associate
> Department of the Geophysical Sciences, University of Chicago
> 5734 South Ellis Avenue, Chicago, IL 60637, USA.
>
>
> On Thursday, July 8, 2004, at 06:26  PM, Jonathan Hanson wrote:
>
>> 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.
>>
>>
>> -------------------------------------------------------
>> This SF.Net email sponsored by Black Hat Briefings & Training.
>> Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital 
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>> networking opportunities. Visit www.blackhat.com
>> _______________________________________________
>> Matplotlib-users mailing list
>> Mat...@li...
>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>
>
>
>
> -------------------------------------------------------
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> Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital 
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> https://lists.sourceforge.net/lists/listinfo/matplotlib-users

[Matplotlib-users] legend bug

[Andrew B. <be...@da...>]

hi - the following works ok...

>    sp = matlib.subplot(111)
>    mlfit = sp.plot(mljd, mlflux, 'r-')
>    snfit = sp.plot(mljd, mlflux, 'g-')
>    ctio  = sp.errorbar(jd, f, yerr=df, fmt='bo', ecolor='k', capsize=1)
>    sp.legend( ('ML fit', 'SN fit', 'CTIO'), loc='upper right')

however the legend is incorrect/incomplete if i change the order the
plots are done

>    sp = matlib.subplot(111)
>    ctio  = sp.errorbar(jd, f, yerr=df, fmt='bo', ecolor='k', capsize=1)
>    mlfit = sp.plot(mljd, mlflux, 'r-')
>    snfit = sp.plot(mljd, mlflux, 'g-')
>    sp.legend( ('ML fit', 'SN fit', 'CTIO'), loc='upper right')

thanks,
andy

Re: [Matplotlib-users] Matplotlib import issues in PHP

[Rodrigo C. <rc...@ge...>]

I did some python CGI scripting at one point, and I needed to do 
something like

os.environ['MATPLOTLIBDATA'] = '/where/matplotlib/lives'

before  the matplotlib import ... hope that helps,

rodrigo

---

Rodrigo Caballero Augi (http://geosci.uchicago.edu/~rca)
Research Associate
Department of the Geophysical Sciences, University of Chicago
5734 South Ellis Avenue, Chicago, IL 60637, USA.


On Thursday, July 8, 2004, at 06:26  PM, Jonathan Hanson wrote:

> 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.
>
>
> -------------------------------------------------------
> This SF.Net email sponsored by Black Hat Briefings & Training.
> Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital 
> self defense, top technical experts, no vendor pitches, unmatched 
> networking opportunities. Visit www.blackhat.com
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>

Re: [Matplotlib-users] Matplotlib import issues in PHP

[Peter G. <pgr...@ge...>]

My guess would be that it is a permission issue from running udner 
apache..  did you look at your apache error log files? What os are you 
using?  Can you run this script under apache directly (as cgi say) 
instead of calling it throught php? I remember that I had to manually 
change some permissions on some of the matplotlib (or maybe the font 
packages that come with it) stuff to get things running...

Peter

Jonathan Hanson wrote:

> 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.
>
>
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[Matplotlib-users] Matplotlib import issues in PHP

[Jonathan H. <ha...@ph...>]

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.

Re: [Matplotlib-users] bug in mathtext

[Paul B. <ba...@st...>]

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

Re: [Matplotlib-users] importing images

[John H. <jdh...@ac...>]

>>>>> "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()

[Matplotlib-users] freetype2 and Mac OS X

[Jeffrey J. <Jef...@gs...>]

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

[Matplotlib-users] easy way to turn off minor gridlines in log plot

[danny s. <dan...@ya...>]

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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