Matplotlib boxplot x axis

Question

It's easier to ask this with a figure. At the moment i obtain the following boxplot graph using matplotlib:

Is there a way to obtain a figure like that, but with each box in a position coherent with the corresponding x-axis number (like in a normal scatter plot, but with boxes instead of points)?

At the moment the numbers on the x-axis are added by means of the labels= argument.

score 38 · Accepted Answer · edited Aug 29 '22 at 15:32

38

You need to specify the positions argument to the boxplot constructor.

from matplotlib import pyplot as plt

plt.boxplot([[1,4],[2,5],[3,6]], positions=[2,4,5.5])

By default it uses the values [1, 2, ..., n] but you can specify a different x position for each bar and the xticks will be updated automatically.

edited Aug 29 '22 at 15:32

Daniel

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answered Mar 08 '16 at 15:55

Suever

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Thanks for the answer. Will it work even with floating point values (like the ones in the example)? – FMarazzi Mar 08 '16 at 16:02
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@FMarazzi Yes. I updated the example to demonstrate that. – Suever Mar 08 '16 at 16:03

Matplotlib boxplot x axis

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