[Matplotlib-users] How to plot 2d histogram with the same scale!!

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Hi all,I want to use contourf function in matplotlib to plot 2D free energy
histogram for my research. I have 2 plots and want them have the same
colorbar scale so that I could compare the minima or maxima. I've been
looking at colorbar doc but i can not find a solution. I always gets 2
different colorbar scale.
Thanks for your reply and have a good day.

Regards
HNN