CODEWITHSUNDEEP
matlabcolormap
jarhead
jarhead

Reputation: 1901

Using a colorbar to append colors to a bar graph by given values MATLAB

Consider the following bar graph

figure
bar([2 4 8; 1 2 3; 3 3 3],'stacked')

enter image description here

I would like each bar to have a color which will correspond to a colormap (here, between [0,1]), such that every bar get a color that matches the following data

data = [0.1 0.8 0.1; 0.5 0.5 0.2; 0.6 0.3 0.9];

Upvotes: 0

Views: 182

Answers (1)

Matteo V
Matteo V

Reputation: 1163

You can use the 'CData' argument to set the color of the faces individually. You just need to remember to set 'FaceColor' as 'flat' also.

b = bar([2 4 8; 1 2 3; 3 3 3], 'stacked');
data = [0.1 0.8 0.1; 0.5 0.5 0.2; 0.6 0.3 0.9];

for i = 1:length(b)
    b(i).CData = repmat(data(i, :)', [1, 3]); % use your data as grayscale color level
    b(i).FaceColor = 'flat';
end

EDIT: In case I've mistaken the order you wanted the colors in your colormap, you should change the Cdata call to b(i).Cdata = repmat(data(:, i), [1, 3]); instead. Not sure which one you wanted.

Upvotes: 1

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