Documentation Link

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Problem

Making a colorbar histogram is a kinda popular visualization that's not difficult but I figure finnicky enough that it's worth adding an example to the gallery.

Suggested improvement

I've got one here to explain what I mean but I'm making this an issue so that maybe someone who has a better example can have fun with this:

x=np.random.random(100).reshape(10,10)counts,bins=np.histogram(x)cmap=plt.colormaps['viridis']norm=mcolors.BoundaryNorm(bins,cmap.N)fig,ax=plt.subplots()im=ax.imshow(x,cmap=cmap,norm=norm)cbar=plt.colorbar(im)cax=ax.inset_axes([1.5,0,.25,1])midpoints=bins[:-1]+np.diff(bins)/2cax.barh(midpoints,counts,height=1/len(counts),color=cmap(norm(midpoints)))cax.set_yticks(bins)cax.margins(0)cax.spines[:].set_visible(False)

I'm making cax an inset_axes here mostly because a lot of the real use cases for this are maps where it's nice to have a lot of control on where to put the histogram. I figure this example should live in color. Would be even nicer with#26312 and colorizer 'cause then I think the syncing is managed.