Matlab: add unit above the colorbar

Question

I have a question about how to add a unit above the colorbar. My code as below:

hc=colorbar;
xlabel(hc,'psi');

However, it reveals that unit is not above the colorbar.

Answer 1

Replace xlabel(hc,'psi') by title(hc,'psi'). So the code becomes

hc=colorbar;
title(hc,'psi');

This gives

Answer 2

You can use the code as below

title(colorbar,'psi','FontSize',24);