How to change text size in boxplot

Question

John 2013-1-18

2
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https://ww2.mathworks.cn/matlabcentral/answers/59200-how-to-change-text-size-in-boxplot

回答： roger 2016-12-14

Hi,

Would anybody know how to change the size of the font on the x-axis labels in a boxplot. For example I want to make the label "Urban Congested" larger?

I cannot figure out how to do it in the axis property editor.

Thank you

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Answer 1

Daniel Shub 2013-1-18

1
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https://ww2.mathworks.cn/matlabcentral/answers/59200-how-to-change-text-size-in-boxplot#answer_71629

编辑：Daniel Shub 2013-1-18

在 MATLAB Online 中打开

I can think of two ugly hacks that work ...

The first is to set the default font size of all text labels for the plot

h = figure;
set(h, 'DefaultTextFontSize', 30);
load carsmall
boxplot(MPG, Origin);

The second is to change the text label after plotting

load carsmall
h = boxplot(MPG, Origin);
set(findobj(get(h(1), 'parent'), 'type', 'text'), 'fontsize', 30);

It is not clear to me what boxplot is actually returning. It is an array of handles, when I would have expect the group. My guess is if you look through the code of boxplot you can find a cleaner way.

EDIT

If you only have the figure file

hFig = figure;
load carsmall
boxplot(MPG, Origin);
saveas(hFig, 'temp_figure');
close(hFig);

You can open the figure and get the handle to the figure

hFig = open('temp_figure.fig');

The goal is then to find the boxplot object. Unfortunately, the boxplot object this is just an hggroup object and there might be lots of hggroup objects which are not boxplot objects. I don't know how to figure out if an hggroup object is actually a boxplot object. You can however, click around and select objects until gco works:

set(findobj(get(gco, 'Children'), 'type', 'text'), 'fontsize', 30);