Custom colorbar in healpy mollview

Question

I am trying to replace the colorbar given by "hp.mollview" with a custom one. In particular I am interested in:

Rotating the colorbar by 90 degrees (i.e. replacing the horizontal by a vertical one)
Using two labels (left and right of the colorbar)
Setting custom ticks
Indicating that the range is set (via the "max" parameter) by setting "cmap.set_over".

Minimal amount of code:

import numpy as np
import healpy as hp
m = np.arange(hp.nside2npix(32))
hp.mollview(m)

Any help?

you should disable the colorbar in `mollview` and then add a custom one with `Figure.colorbar` — Andrea Zonca, Mar 28 '14 at 11:49

score 4 · Accepted Answer · answered Sep 11 '14 at 22:15

I'll expand my comment here:

import numpy as np
import healpy as hp
import matplotlib.pyplot as plt
m = np.arange(hp.nside2npix(32))
hp.mollview(m, cbar=None)

fig = plt.gcf()
ax = plt.gca()
image = ax.get_images()[0]
cmap = fig.colorbar(image, ax=ax)

Then you can customize the colorbar with the function arguments.

Custom colorbar in healpy mollview

1 Answers1