antonv wrote: > Thanks for the quick reply John! Now it makes a lot more sense. The next dumb > question is what is SVN and where can I find more bout it?
http://sourceforge.net/svn/?group_id=80706 http://subversion.tigris.org/ Eric > > > John Hunter-4 wrote: >> On Fri, Jan 16, 2009 at 10:33 AM, antonv <vasilescu_an...@yahoo.com> >> wrote: >>> I have a series of 18 separate colors to create my cmap but I would like >>> to >>> convert that to a continuous map which interpolates all the other values >>> in >>> between my chosen colors. This should be really easy but I am not sure >>> how >>> can it be solved. Any ideas? >> Although the logic of the LinearSegmentedColormap takes some time to >> get your head around, it is pretty easy. >> >> >> http://matplotlib.sourceforge.net/api/colors_api.html#matplotlib.colors.LinearSegmentedColormap >> >> >> Here is an example: >> >> import numpy as np >> import matplotlib.pyplot as plt >> import matplotlib.colors as mcolors >> import matplotlib.cm as cm >> colors = 'red', 'green', 'blue', 'yellow', 'orange' >> >> ncolors = len(colors) >> >> vals = np.linspace(0., 1., ncolors) >> >> cdict = dict(red=[], green=[], blue=[]) >> for val, color in zip(vals, colors): >> r,g,b = mcolors.colorConverter.to_rgb(color) >> cdict['red'].append((val, r, r)) >> cdict['green'].append((val, g, g)) >> cdict['blue'].append((val, b, b)) >> >> cmap = mcolors.LinearSegmentedColormap('mycolors', cdict) >> >> >> x = np.arange(10000.).reshape((100,100)) >> >> plt.imshow(x, cmap=cmap) >> >> plt.show() >> >> See also >> http://matplotlib.sourceforge.net/examples/pylab_examples/custom_cmap.html. >> I just added a function to svn to support this, so with svn you can >> do >> >> >> colors = 'red', 'gray', 'green' >> cmap = mcolors.LinearSegmentedColormap.from_list('mycolors', colors) >> X, Y = np.meshgrid(np.arange(10), np.arange(10)) >> plt.imshow(X+Y, cmap=cmap) >> >> JDH >> >> ------------------------------------------------------------------------------ >> This SF.net email is sponsored by: >> SourcForge Community >> SourceForge wants to tell your story. >> http://p.sf.net/sfu/sf-spreadtheword >> _______________________________________________ >> Matplotlib-users mailing list >> Matplotlib-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/matplotlib-users >> >> > ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
