Hi Steve, On Tue, May 30, 2017 at 3:10 PM, Steven Pawley <dr.stevenpaw...@gmail.com> wrote:
> > Thanks for writing the r.colors.matplotlib tools because I use the > matplotlib colorramps very frequently both in GRASS and in python more > generally. > Glad to hear that. > > I seem to be having a problem of using the perceptually uniform ramps in > the r.colors.matplotlib add on, receiving the error: ERROR: Matplotlib > 2.0.2 does not contain color table <plasma> > > I'm on linux and matplotlib 2.0.2 has the perceptually uniform ramps, and > I can use them if I display data in python within a GRASS session directly > (i.e. plt.imshow(numpyraster, cmap='plasma'). > > Is there a reason why r.colors.matplotlib can't see these ramps? It still > works with all of the traditional matplotlib ramps. The module does not check for specific color maps in mpl, but it uses general code to check the presence of a requested color map. It imports matplotlib.cm.datad dictionary. Perhaps, this dictionary does not contain the new color maps. The checking is not ideal, it should based on cm.get_map() function. I think the reason why I "ask for permission" here instead is that I was not able to figure out what is the error state from get_map() or how to transfer it to the user. But perhaps you will be more successful or 2.0 behaves differently. The relevant code is here: https://trac.osgeo.org/grass/browser/grass-addons/grass7/raster/r.colors.matplotlib/r.colors.matplotlib.py#L164 Best, Vaclav
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