Color each boxplot differently
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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?
回答（2 个）
Jon
2022-4-26
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 个评论
Jon
2022-4-26
You can also change the linewidth as follows
a = magic(3);
boxplot(a)
i = 3; % number of boxplots
x = 1:i;
colors = [1 0 0;0 1 0;0 0 1];
lineWidth = 2;
figure
boxplot(a, x,'BoxStyle','outline','Colors',colors)
h = findobj(gca,'Tag','Box');
for j=1:length(h)
set(h(j),'LineWidth',lineWidth)
patch(get(h(j),'XData'),get(h(j),'YData'),get(h(j),'Color'),'FaceAlpha',.5);
end
Alberto Acri
2022-4-26
I was interested in having an increase in the thickness of all the lines in the figure. See below:
Jon
2022-4-26
If you are running R2020A or higher you may want to investigate boxchart. It seems to offer the options you want more directly
As has been pointed out, boxchart (documentation) was introduced in R2020a and offers flexibility with coloring of the face of boxes (and much more):
a=magic(3);
b=boxchart(a(:),'GroupByColor',repelem(1:3,3));
get(b,'BoxFaceColor')
This property enables you to do exactly what you want to do. For example, if you wanted to change the color of the first blue box, b(1).BoxFaceColor = 'm';
BoxChart Properties documentation, especially the "Color and Styling" section, shows many more properties that might be of interest.
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2022-4-26
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