MATLAB: GUI red, blue, and green channels

Question

I'm working on a problem involving opening an image in a GUI and show it in an axes. I also need to show 3 images for the red, green, and blue channels in three separate axes in the same GUI. I'm having troubling with creating the three other images. Any ideas?

Answer 1

[filename, filepath] = uigetfile();
if ~ischar(filename); return; end    %user cancel
fullname = fullfile(filepath, filename);
img = imread(fullname);
R = zeros(size(img), class(img));
G = R;
B = R;
R(:,:,1) = img(:,:,1);
G(:,:,2) = img(:,:,2);
B(:,:,3) = img(:,:,3);
imshow(handles.axes_for_RGB, img);
imshow(handles.axes_for_R, R);
imshow(handles.axes_for_G, G);
imshow(handles.axes_for_B, B);