Thread Subject: image processing- correlation map

Hey,
I have a matrix which contains "grades" of correlation between patches. the range of the grades is [o 1]. how can I create a correlation map (or heat map) that shows in the optimal way the distribution of the grades received.

I will appreciate any help.
thanking you in advance!

How many dimensions does this array have? Two I presume? Why don't
you just display it as an image with imshow(), imagesc(), image(), or
pcolor()?