Unfortunately, clip paths are not implemented for the Agg backend. Other backends (Ps, Pdf, Svg) may work, but I haven't tried that in a while.
I've spent a few tries trying to come up with the magic Agg incantation to make this work. It's not really documented in Agg, but it should theoretically be possible. It would take someone probably to dig through the Agg source code and figure it out. Any volunteers? ;) Cheers, Mike Federico Milano wrote: > Dear All, > > I am a new user of python and of matplotlib, so, please excuse me if I > am asking a trivial question. > > I am trying to use the funciton imshow to plot a temperature map of the > voltage levels of an electrical grid. After creating the grid data > using "meshgrid" and "griddata" functions, "imshow" works nicely and > fills up the whoe axes box. > > Since, I also have the border line of the electrical grid (in the form > of a closed polygon coordinates), my next step is to clip the > temperature map using this polygon as a patch. Thus, I have created a > Path instance with the polygon coordinates, subsequently, a PathPatch > instance, say "patch". > > Finally, I call the imshow function using the Artist options > "clip_on=True" and "clip_path=patch". I was expecting that imshow would > have filed up only the region inside the polygon, but imshow is still > mapping the full figure axis box, i.e., the plots with and without the > clip_path option are identical. > > What am I missing or doing wrong? > > Thank you very much in advance for any help, > > Best wishes, > > Federico > > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
