John Hunter wrote:
> On Jan 4, 2008 4:33 PM, Mephisto <[EMAIL PROTECTED]> wrote:
>> For some simple but effective Python code you can use to create a mask
>> similar to that provided by the Matlab roipoly function, see
>> http://www.ariel.com.au/a/python-point-int-poly.html
>> http://www.ariel.com.au/a/python-point-int-poly.html . The code seems to be
>> quite effective.
> 
> matplotlib implements these algorithms in C -- see
> matplotlib.nxutils.pnpoly for a testing inclusion of a single point,
> and matplotlib.nxutils.points_inside_poly for testing multiple points.
>  There is some example code using the latter function at
> http://matplotlib.sf.net/examples/lasso_demo.py.  Not sure why this
> example is not working for Venkat.

This is probably not the reason for Venkat (I think he said he was using 
0.87)... but lasso_demo.py is currently broken on the trunk, and working 
for me in 0.91.2.  I'm looking into it.

Cheers,
Mike

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

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