Dear folks, I tried to plot a colored map with non-uniformed discrete colorbar and found a few threads related with this. However, I could not find a way to apply non-uniformed discrete colorbar over imshow or pcolor. Would anybody give me a clue? Thanks in advance.
Kim Eric Firing wrote: > James Boyle wrote: >> I wish to make a color filled plot with the colors defined for >> discrete, non-uniform intervals. Something like: >> 0.0 -0.001 0.001-0.05 0.05-0.2 0.2-0.4 0.4-0.8 0.8-1.0 >> red blue green magenta >> yellow cyan >> >> with the colorbar labeled appropriately. >> I have seen discussions and solutions for discrete colors but not >> for non-uniform intervals + discrete. >> The last post I saw regarding this type of issue was august 2005 - >> and a solution was not resolved at that time. >> However, Eric has done a huge amount of work in the intervening time >> and a smarter person than myself might have a solution now. >> >> Note that I do not wish just to make contours - although that would >> be good - but to have a general mapping code that joins allows the >> color rmapping to be passed to colorbar. >> maybe some sub-class of scalarMappable that could work. > > This is very easy for contourf, and is illustrated in the second > figure made by examples/contourf_demo.py. For your case above, it > would be something like > > levs = [0, 0.001, 0.05, 0.2, 0.4, 0.8, 1] > colors = ['r', 'b', 'g', 'm', 'y', 'c'] > contourf(z, levs, colors=colors) > colorbar() > > Unfortunately, although it *should* be just as easy for imshow or > pcolor, it is not at present; it can be done, probably in several > ways, but not in such a transparent way. Attached is a quick attempt > at something that might be close to what you need. The right way to > do this is to make some changes and additions to colors.py and > colorbar.py; I might get to that in a few days, or, more likely, it > might be a few weeks. > > Eric > >> >> Thanks for any help. >> >> --Jim > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > ------------------------------------------------------------------------ > > _______________________________________________ > 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
