How to superpose several pcolor plots on same image

Hi, I'm trying to superpose several pcolor plots but cannot find the right way. Hold on doesn't seem to work.

Also I would like each pcolor plot to have only one colour for all points instead of using a colormap, is that possible?

Thanks for your help !

Max

[Adam]

What do you mean by 'doesn't seem to work'? It's not a very helpful comment!

[Max Jaquenoud]

Sorry, by that I mean that I get each pcolor plot in a separate figure

[jonas]

You're still not helpful. The following creates two pcolor plots on the same axes:

pcolor(peaks)
hold on
pcolor(peaks(10))

So what did you do to cause matlab to open a new figure? Some code would be quite useful... also, what do you mean by a single color per plot? I will not ask why you'd want to do such a thing, but you can just set the z-data to a uniform value and apply any colormap.

Answer 1

[Image Analyst]

Maybe you're having a problem because pcolor doesn't have the same number of "pixels" as what you passed in. See this code:

pcolor(rand(3,5)); % Show 3 by 5 grid of pixels - NOT!

Try these links to see how to overlay an image on another image.

Steve's Image Processing Blog

Another link