Phil, Jim,
Thanks. I need to add a suitable example for the contourf case, because
as you have discovered it is a little different from all the other
mappable cases: colorbar takes its cue from the contourf arguments so as
to be consistent with the way the contourf plot was made. There is a
line in the colorbar docstring indicating this, although I don't recall
when I put that line in, so it may not be in the version you are using:
If mappable is a ContourSet, its extend kwarg is included automatically.
Eric
Philip Austin wrote:
> James Boyle writes:
> > Thanks, Eric
> >
> > to
> >
> > im = contourf(Zm,cmap=palette)
> >
> > I do not get the over/under pointers on the end of the colorbar.
> >
> > Does this feature not work with contourf - Or am I doing something
> > wrong.
>
> Here's a code segment that works for me:
>
> vmin,vmax=(280,305)
> norm = colors.normalize(vmin = vmin, vmax = vmax, clip = True)
> cmap=matplotlib.cm.jet
> cmap.set_over('salmon', 1.0)
> cmap.set_under('black', 0.25)
> contplot = axes.contourf(pv.time_value,
> pv.pressure_value,
> pv.var1_value,
> n.arange(vmin,vmax,2.),
> norm=norm,
> extend='both',
> cmap=cmap)
>
>
> I got the hint on this from the contourf docstring
>
> ***** New: *****
> * extend = 'neither', 'both', 'min', 'max'
> Unless this is 'neither' (default), contour levels are
> automatically added to one or both ends of the range so that
> all data are included. These added ranges are then
> mapped to the special colormap values which default to
> the ends of the colormap range, but can be set via
> Colormap.set_under() and Colormap.set_over() methods.
> To replace clip_ends=True and V = [-100, 2, 1, 0, 1, 2, 100],
> use extend='both' and V = [2, 1, 0, 1, 2].
>
>
> regards, Phil
>
>
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