MATLAB: Patch color error “Vectors must be the same length.”

colorpatch

I am trying to plot 2 patchs with different color. " patch(x, y, c, 'FaceColor', 'flat');" shows error "Vectors must be the same length.". How to setup the color? 
x =[ 1     2
     1     2
     2     3
     2     3];
 
y =[1     2
    2     3
    2     3
    1     2];
 
c=[0    0.7344
   0    1.0000
   0.5156    0.2656];
 
figure;
patch(x, y, 'r');
figure;
patch(x, y, c, 'FaceColor', 'flat');
Thanks,
cfy30

Best Answer

The docs linked by Geoff mention that you can specify an n-by-1-by-3 array of RGB values (for n number of faces). I've defined c to be an n-by-3 array of RGB values and then used reshape() to get the dimensions right:
c=[0    0   0.5156           % <- RGB of first color
   0.7344   1.0000  0.2656]; % <- RGB of second color
figure;
patch(x, y, reshape(c,[],1,3), 'FaceColor', 'flat');
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