Pcolor 2d matrix with a different color for position value

I have a matrix with 10 rows and 10 columns. And in any of the x/y positions there could be a number from 0 to 3.

Can I pcolor the matrix with a different colour for each number from 1 to 3? Zero would be an empty space.

I am actually looking for an easy way to merge 2 different binary matrices of the same size into one pcolor figure and show where they both share a 1 as well as each matrix's own unique 1s. Value 3 would indicate where they both have a 1.

Answer 1

[KSSV]

http://stackoverflow.com/questions/24630132/matlab-custom-colormap-with-only-3-colors

Answer 2

[Image Analyst]

pcolor() will only show 9 columns and 9 rows, not 10 and 10. Use imshow() instead.