Smooth contours in simple 2D matrix

Dear all,

I have a 2D matrix that I plot via imagesc. It's a simple matrix full of three numbers: 1, 2 and 3 (attached)

I would like to have smooth contours separating the regions of ones, twos and threes, instead of the rough boundaries. How could I do it? Thanks, for the help!

Answer 1

[Mike Garrity]

Contour won't you control the interpolation, but you can do it yourself. You basically need to follow this example I posted on the graphics blog for surface:

http://blogs.mathworks.com/graphics/2014/11/18/what-is-a-surface/

[Ac]

OK, I was indeed checking the interp2 function. I'll go through your example and do some test. Thanks!