How to change color bar for images function?

Dear all:

Any one could help me with this problem:

I used the following piece of code to generate a heat map for a matrix:

clf
imagesc(full_B);
colorbar;

The color bar default look like this:

I am thinking about changing the color bar into something like rainbow.

How should I be doing it?

Thanks! Ruming

Answer 1

[Image Analyst]

Try this

imagesc(full_B);
colorbar;
colormap(jet(256));

or even better:

imshow(full_B, []);
colorbar;
colormap(jet(256));

[NeoBeaver]

thanks a lot! It works.