MATLAB: How to add a colormap manually as x-axis under an histogram

Question

Dear all,

I have created an histogram to look at the distribution of pixels per grey in an (8-bit) image. The reason for not using the imhist function is because I create an histogram with a double y-axis, one on the left (a log-axis) and one on the right (normal axis) to represent how wide the distribution is at the low values. (The function I use is attached, in case it is of interest to anyone. It is just an adaptation done quickly from a function by Araja.) The type of histogram I get is this:

I would like to add a colormap under the x-axis, like the one we can see here:

Anybody knows how to do so?

Thank you in advance!

Answer 1

Call colorbar with the 'southoutside' location as shown in the "Add Horizontal Colorbar to Graph" example on the documentation page.