Color each boxplot differently

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Alberto Acri
Alberto Acri on 26 Apr 2022
Commented: Jon on 26 Apr 2022
I found an example that allows you to color with random colors. However, I want to color the inside of each boxplot with a certain color.
a = magic(3);
boxplot(a)
i = 3; % number of boxplots
x = 1:i;
colors = rand(i, 3);
figure
boxplot(a, x,'Whisker', inf);
h = findobj(gca,'Tag','Box');
for j=1:length(h)
patch(get(h(j),'XData'),get(h(j),'YData'),colors(j,:),'FaceAlpha',.5);
end
I would also like to make the lines thicker. How can I do this?

Answers (1)

Jon
Jon on 26 Apr 2022
I think this should get you closer to what you want. You can select other colors using their rgb color codes, I just used red,green and blue in the example
a = magic(3);
boxplot(a)
i = 3; % number of boxplots
x = 1:i;
colors = [1 0 0;0 1 0;0 0 1];
figure
boxplot(a, x,'BoxStyle','outline','Colors',colors);
h = findobj(gca,'Tag','Box');
for j=1:length(h)
patch(get(h(j),'XData'),get(h(j),'YData'),get(h(j),'Color'),'FaceAlpha',.5);
end
  3 Comments
Alberto Acri
Alberto Acri on 26 Apr 2022
I was interested in having an increase in the thickness of all the lines in the figure. See below:
Jon
Jon on 26 Apr 2022
If you are running R2020A or higher you may want to investigate boxchart. It seems to offer the options you want more directly

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