I think the pretty-fying done in the Colorbar class will make this harder; at least, twiny on an existing colorbar doesn’t work (overwrites original ticks); having two colorbars works fine but wastes space; and adding a spine had surprising side-effects (changed the color range!).
I would guess that you want a custom Colorbar class, with a different offset for a second set of ticks.
note that in colorbar.py, there’s some code specific to CountourSets.
On Nov 15, 2010, at 15 Nov, 8:22 AM, Daniel Welling wrote:
I am making some contour plots and in my field for this particular value, there are two widely used units. As such, it is very useful to have both units listed on the colorbar. To clarify: the colorbar’s normal ticks would be facing to the right and labeled with Unit Type 1, which was the units that the data were in when they were plotted. Unit Type 2 is simply a factor of X different than unit type two. It would be nice if I could add a second set of ticks to the color bar using a different locator and have them face left. Is this possible? Is there another way to display two values for each tick such that the colorbar shows both units?
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