Confirmed. This might also explain some other behaviors I have noticed with pcolormesh and rasterized=True.
Ben Root On Tue, Jun 1, 2010 at 11:18 AM, Jae-Joon Lee <lee.j.j...@gmail.com> wrote: > It seems that pcolormesh silently ignores some of the keyword > parameters, and "rasterized" is one of them. And I'm not sure this is > intended behavior or not and I hope other developers step in. > > In the meantime, use a member method explicitly. > > p2 = pcolormesh(arr) > p2.set_rasterized(True) > > Regards, > > -JJ > > > On Tue, Jun 1, 2010 at 12:05 PM, Benjamin Root <ben.r...@ou.edu> wrote: > > > > > > On Tue, Jun 1, 2010 at 9:39 AM, Ryan May <rma...@gmail.com> wrote: > >> > >> On Mon, May 31, 2010 at 11:28 AM, Benjamin Root <ben.r...@ou.edu> > wrote: > >> > Markus, > >> > > >> > That is good to know that it has been fixed. As for the difference in > >> > pcolor and pcolormesh, I think it has to do with the fact that > >> > pcolormesh is > >> > composed of many lines while pcolor is composed of many polygons. It > is > >> > probably more efficient to rasterize polygons than lines. > >> > >> To be blunt, this makes no sense whatsoever. First, pcolormesh and > >> pcolor differ in that it pcolor uses a generic PolyCollection to draw > >> the quads, while pcolormesh uses a quadmesh object, which can be more > >> efficient at the cost of generality, as it only needs to render a set > >> of identical quads. Second, if you're talking rasterized drawing, in > >> the end what gets written to a file is a 2D array of RGBA values. It > >> doesn't matter what you use to produce the results: identical image on > >> the screen -> identical array in file. It's possible that there are > >> slight differences that you can't really see that produce different > >> arrays, but that won't cause a factor of 8 difference in size. My > >> guess is that pcolormesh isn't rasterizing properly. > >> > > Indeed, you are right that lines aren't drawn. I have looked back at the > > images produced by my test script that I posted to this thread and I see > > where I got confused. The pcolormesh result in pdf and eps files have > very > > faint white blocks around each quad. At high enough data resolution, the > > color part of the quads look like lines while the white lines look like > > dots. This happens regardless of using rasterized=True or not, and I > don't > > think it is visible in png files (although I am testing some very high > > resolution png files to verify). > > > > Ben Root > > > > > ------------------------------------------------------------------------------ > > > > > > _______________________________________________ > > Matplotlib-devel mailing list > > Matplotlib-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/matplotlib-devel > > > > >
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