MATLAB: How to create color map

Question

Hello everybody,

I plot a bargraph by using 2×500, and I need to create a colormap. However it is a bit strange colormap so I need code that, for example, all the values between 15-20 will be blue, all the values between 20-25 will be red and so on. I have never worked with bar colormap and especially with this kind of code. If someone can help I would be very glad.

Thanks in advance.

Answer 1

Use a stacked bar graph by entering an nxm matrix which will produce n bars each with m segments.

h = bar(rand(20,40), 'stacked');  % 20 bars, 40 segments each

Change the color of bars 15-20 to blue.

set(h(15:20), 'FaceColor', 'b')