# transform bar chart with separate bars (for each value of y) to bar chart with overlapping bars

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Alberto Acri il 20 Ago 2023
Commentato: Alberto Acri il 21 Ago 2023
Hi. I need to transform this figure:
matrix = matrix(5:7,:);
figure();
cm = [1,0,0; 0,0,1; 0,1,0; 1,0,0.52];
hbh = barh(matrix(:,1), matrix(:,[2 3 4 5]));
for k = 1:numel(hbh)
hbh(k).FaceColor = cm(k,:);
hbh(k).EdgeColor = [0,0,0];
end
into this one:
I tried the following way but I don't get the same result.
figure
hbh = barh(matrix(:,1), matrix(:,[2 3 4 5]),'stacked');
cm = [[1,0,0]; [0,0,1]; [0,1,0]; [1,0,0.52]];
for k = 1:numel(hbh)
hbh(k).FaceColor = cm(k,:);
hbh(k).EdgeColor = [0,0,0];
end
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Rik il 21 Ago 2023
The reason I included the max call was for robustness. If at one point a negative diff occurs, I would like to prevent unexpected behavior.
the cyclist il 21 Ago 2023
I understand. But after the sort, a negative diff can't occur. (But if I am wrong about the sorting, then the max would be required, as you state.)

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### Risposta accettata

the cyclist il 20 Ago 2023
M = matrix(:,2:end);
[sortedM,sortingIndex] = sort(M,2);
cm = [[1,0,0]; [0,0,1]; [0,1,0]; [1,0,0.52]];
figure
hold on
for mi = 1:height(sortedM)
hbh = barh(matrix(mi,1), [sortedM(mi,1),diff(sortedM(mi,:),1,2)],'stacked');
for k = 1:width(sortedM)
hbh(k).FaceColor = cm(sortingIndex(mi,k),:);
end
end
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the cyclist il 20 Ago 2023
I stuck to answering what you asked for, but be aware that this method of plotting bars "in front of each other" can be somewhat deceptive, from an information point of view. For example, the green bar at 68 is nearly the same value as the blue bar, but the visual impact is tiny. (I think that's the reason @Dyuman Joshi thought you didn't want it at all.)
It would take more work, but you might want to consider using the method of overlaying bars that is described on this documentation page.
Alberto Acri il 21 Ago 2023
Thank you @the cyclist. That is the result I wanted.
Right now I prefer to use the graph with the bars overlaid with the code you provided because I have the desired values on the x-axis. Of course, it is not easy to read, in fact I will modify it with the documentation you attached.
I asked the question here because I have a problem with the visualization. If you want you can take a look at it.

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