One thing you have missed is the behavior of pylab.cm.jet. If you pass it an integer array, it treats the integers as indices into the default jet colormap, with 256 colors. If you pass it a float array, the floats must be scaled from 0 to 1, in which case you will get scaled values from the colormap.
I am sure there is more to this story, and probably some improvements needed in scatter and/or its documentation, but this is all I have time for at the moment. Eric Joe Shmoe wrote: > On 8/14/07, Matthew Auger <[EMAIL PROTECTED]> wrote: >> This demonstrates the *solution*--the problem is that scatter() does not >> automagically perform color mapping for the edge and face colors. > > Indeed...and I wish the behavior was more like other mpl functions. > Either way, passing my list through a colormap did not solve the issue > (for me). If I call: > > scatter(x,y,s,c) > > then I get a scatter plot where the points are different sizes and > colors. Without specifying the keyword 'edgecolor', it is not > possible to have varying edge colors. For consistency, I set the > facecolors through a keyword as well. So, I would like to be able to > make the following command: > > scatter(x,y,s, facecolor=cm.jet(c), edgecolor=cm.jet(ec)) > > where, as noted, we must manually map the colors when specifying via > keywords. However, when I run the above command, I do not get a > scatter plot with varying sizes, colors, and edgecolors. Instead, I > get varying sizes, all points with 'b' as a facecolor, and all points > with 'k' as an edgecolor. > > I've tried to figure this out...comments are requested... > > I am looking at axes.py/scatter now.... > > When I make the above statement, c takes on its default value (which > is 'b'). The function sees that c is string like and converts it to a > rgba_list. Since 'faceted' defaults to True, edgecolors=None. > > Now we go through and create the *PolyCollection. For 'facecolors' we > pass in 'b'...and for 'edgecolors' we pass in None. After creation, > collection.update(kwargs) is called. > > As I understand it, this is what *should* happen when the update > method is called: The collection should take my keywords 'facecolor' > and 'edgecolor' and assign them to self._facecolors and > self._edgecolors. This does occur (as my first reply demonstrated). > It seems what should *also* happen is that the facecolors/edgecolors > of the points should be updated...but this does not occur. > > Do you (or does anybody) have a working, simple example where the > faces/edges are both varying for a scatter plot? Perhaps I've missed > something obvious. > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
