I have a matrix P of m rows and n columns. P(i,j) contains the price of occupying position i at time j. I want to plot this in Matlab but in a way to get some kind of density plot with different price levels corresponding to different colors. An example of the output would be something like this:
A filled 2-d contour plot seems to be what you are looking for.
Assuming you have vectors (or matrices) "position" and "time", the following snippet should work (modulo an apostrophe or two)