Grouped Bar plot- colors for groups

Dear all,

I have following plot:

ba=([P1,P2); %P_n is n x 1

bar(ba,'grouped');

now I want to seperately color the first and the second bar of each group with different colors. And each group gets a different set of colors, so that I have to use 2*n colors in total, which I have defined via RGB values beforehand.

How do I do this? I tried to work with set() and FaceColor, but it turned everything the same.

Thanks!

Answer 1

[Aurele Turnes]

If you are using MATLAB R2014a or earlier versions, you can recolor individual bars by first getting a handles to the bar plot as follows:

bar_handle = bar(ba,'grouped');

Then, access the groups by accessing the children of the handle above:

bar_group = get(bar_handle,'children');

Now, you can decide what colors you want each individual bar to have by giving them a color index and setting the 'FaceVertexCData' property for that group. For instance, if there are n bars in the first group, and you want the first bar to be a different color, you can do:

fvcd = ones(n,1);
fvcd(1) = 3;
set(bar_group{1},'FaceVertexCData',fvcd)

This is not supported in the MATLAB R2014b_Prerelease however.