Changing labels in matplotlib polar plot

Question

I am using matplotlib to create polar plots to represent Rose Diagrams. Right now the plot is getting created perfectly. I want to replace the angles being displayed on the axis with direction names: N for 0 degrees, W for 90 degrees, S for 180 degrees and E for 270 degrees.

The current rose diagram looks like the following: enter image description here

Note: I have tried with windrose but this output is more appropriate for my purpose. Hence a good way of assigning custom labels to the axes will be very helpful.

The python version I am using is 2.6 with matplotlib version 1.2.0

score 15 · Accepted Answer · answered Apr 18 '13 at 16:01

15

Assuming that you have an axes object ax you can do simply do something like this

ax.set_xticklabels(['N', '', 'W', '', 'S', '', 'E', ''])

or get some inspiration by this old example

answered Apr 18 '13 at 16:01

Francesco Montesano

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Thanks. I modified the code as follows: rose=fig.add_subplot(111, polar=True) rose.set_xticklabels(['N', '', 'W', '', 'S', '', 'E', '']) and it worked – DotPi Apr 18 '13 at 16:13
That's exactly what I ment: my `ax` is what you call `rose` – Francesco Montesano Apr 18 '13 at 16:14
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You might want to consider shifting "zero degree" to the top. ax.set_theta_offset(np.pi/2) – Marcel Flygare Oct 16 '17 at 22:05

Changing labels in matplotlib polar plot

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