On 07/29/2011 06:03 PM, Alan G Isaac wrote: > I have many lines to plot. > Each line has an associated parameter value. > I'd like to pick the color for each line > based on its parameter value by mapping > possible parameter values to the colors > in a color map (e.g., gist_rainbow), > retrieving colors one at a time (based > on the parameter value for a line). > > If two lines have the same parameter value, > I need them to have exactly the same color. > > Hints?
Tony's reply may be the right approach for you; but an alternative, if you are plotting a set of lines all at once, is to use a LineCollection, which takes a colors kwarg. (Like all Collections, a LineCollection includes the cm.ScalarMappable mixin.) See http://matplotlib.sourceforge.net/examples/pylab_examples/line_collection2.html but note that the lines within the collection don't have to have the same number of points. Also, Tony's method could be modified easily to use a norm (e.g., an instance of colors.Normalize or of a subclass) in addition to a cmap. Eric > > Thanks, > Alan Isaac > > ------------------------------------------------------------------------------ > Got Input? Slashdot Needs You. > Take our quick survey online. Come on, we don't ask for help often. > Plus, you'll get a chance to win $100 to spend on ThinkGeek. > http://p.sf.net/sfu/slashdot-survey > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users ------------------------------------------------------------------------------ Got Input? Slashdot Needs You. Take our quick survey online. Come on, we don't ask for help often. Plus, you'll get a chance to win $100 to spend on ThinkGeek. http://p.sf.net/sfu/slashdot-survey _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
