[GRASS-user] GRASS GIS 7.0/bundled python/matplolib

[William Kyngesburye]

Or you could install my new matplotlib 1.2 package for the system Python.  Now 32+64bit.

Something I overlooked.  I originally packaged matplotlib from interest for QGIS, 64bit only.  It's possible I had problems compiling the combined 32+64bit in the past, I don't remember.  It worked this time.

On Mar 14, 2013, at 3:21 PM, Jon Eiriksson wrote:

> Being unable to import matplotlib in my python scripts in the GRASS GIS environment (and not able to find binaries for matplotlib 1.2.0 for 32 bit python 2.6, which is needed for the wxgui) - I took the following workaround steps, perhaps they may be useful to someone or save some time. Or, even better, perhaps someone knows how to access matplotlib from the bundled python.
> 
> Downloaded python 2.7 and matplotlib 1.2.0 (as well as numpy and ipython), following recommendations at
> 
> http://matplotlib.org/faq/installing_faq.html#os-x-notes
> 
> I now have two versions of python on my system (Mac OS X Version 10.7.5). The new installation (2.7), and version 2.6 bundled with Michael Barton's GRASS GIS 7.0 binaries (William Kingesburye's frameworks).
> 
> In my .bash_profile I have these GRASS and python related lines:
> 
> #
> export PATH=$PATH:/usr/local/mysql/bin:/usr/bin/python:/Applications/GRASS-7.0.app/Contents/MacOS/scripts
> export PATH=/Library/Frameworks/GDAL.framework/Programs:$PATH
> export PATH=/Library/Frameworks/Python.framework/Versions/Current/bin:${PATH}
> #
> 
> The following python script file was saved to  my home directory:
> 
> /Users/joneiriksson/je_01.py
> 
> #!/usr/bin/env python-32
> 
> import sys
> from grass.script import core as grass
> from grass.script import db as grass
> from array import array
> 
> import matplotlib.pyplot as plt
> 
> def get_convergence():
> 
>    returned_conv_angle = grass.read_command('g.region', flags = 'n')
> 
>    conv_angle = grass.parse_key_val(returned_conv_angle)
> 
>    return str(conv_angle)
> 
> def plot_points_graph():
> 
>    xy = []
> 
>    zero = 0.0
>    xy = [[zero for i in range(2)] for j in range(6)]
> 
>    ix,target = 0,5
> 
>    while ix <= target:
>        xy[ix][0] = ix
>        xy[ix][1] = ix
> 
>        ix = ix + 1
>        print ix
>    print xy
> 
>    plt.plot(xy, 'ro')
>    plt.axis([-1, 6, -1, 6])
> 
>    plt.grid(True)
> 
>    plt.show()
> 
> def main():
> 
>    c_angle_string = get_convergence()
>    print 'convergence angle string = ',c_angle_string
>    plot_points_graph()
> 
>    return 0
> 
> # this "if" condition instructs execution of code contained in this script,
> # *only* if the script is being executed directly
> if __name__ == "__main__": # this allows the script to be used as a module in other scripts or as a standalone script
>    options, flags = grass.parser() #
>    sys.exit(main()) #
> #
> Note the alias in the first line of the script:
> 
> #!/usr/bin/env python-32
> 
> - instead of the normally used
> 
> #!/usr/bin/env python
> 
> - this notation activates python 2.7 instead of the bundled python 2.6
> 
> This enables me to call matplotlib functions from my script, which is activated in the GRASS GIS Terminal window by the command:
> 
> GRASS 7.0.svn (je_location):~ >je_01.py
> 
> Other GRASS related python scripts reside in:
> 
> /Applications/GRASS/GRASS-7.0.app/Contents/MacOS/scripts/
> 
> and work as before, using python 2.6 (#!/usr/bin/env python), compatible with the wxgui
> 
> Jon
> 
> 
> _______________________________________________
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-----
William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
http://www.kyngchaos.com/

"The beast is actively interested only in now, and, as it is always now and always shall be, there is an eternity of time for the accomplishment of objects."

- the wisdom of Tarzan