Display image using RGB values

I have a 45x45 matrix. It has values 0 to 1. I want to assign R,G,B values to each value. Like 0=(0,0,255) and 1=(255,0,0) and the middle values will be accordingly.

And then I want to display the image using those R,G,B values. I am new to matlab so I need some help.

[Raymond MacNeil]

Hi Sheetal:

Red, Green, and Blue channels are read from the first, second, and third 'pages' of a matrix, respectively. Thus, at the very least, you need an M * N * 3 matrix. You can include a fourth 'page' if you want your image to contain an alpha channel.

Here is an example of simple square-wave grating that alternates between red and blue bars. This should get the main idea across:

mata = 255*ones(100,10);
matb = zeros(100,10);
red = cat(3, mata, matb, matb); 
blue = cat(3, matb, matb, mata);
rb_sqwv = repmat([red, blue], 5); 
img = imshow(rb_sqwv)

Cheers,

Ray