quiver plot in polar projection - how to make the quiver density latitude-dependent ?

[so-many-problems]

Hello,

I want to do a quiver plot on a polar basemap plot. I have a regular lat/lon grid, and because there are more grid boxes at the higher latitudes, my code plots as many quivers at the pole as on the equator, so they overlap etc. How can I make the density of quivers latitude-dependent?

This is the code I use

import numpy as np
from mpl_toolkits.basemap import Basemap, addcyclic
import matplotlib.pyplot as plt


m_mu = Basemap(projection='npstere',boundinglat=10,lon_0=0,resolution='l',round=True)

lats=np.arange(0.,91.,15.)
lons=np.arange(-180.,181.,30.)
valin_u=np.array([[np.random.randn() for y in range(len(lons))] for x in range(len(lats))])
valin_v=np.array([[np.random.randn() for y in range(len(lons))] for x in range(len(lats))])
del x,y

valin = np.sqrt( valin_u**2 + valin_v**2 )

mu_cyclic, lons_cyclic = addcyclic(valin, lons)
mu_cyclic_u, lons_cyclic = addcyclic(valin_u, lons)
mu_cyclic_v, lons_cyclic = addcyclic(valin_v, lons)

grid = np.meshgrid( lons_cyclic, lats )
x, y = m_mu( *grid)

plt.figure()
cs = m_mu.pcolormesh(x, y, mu_cyclic)
#csquiv = m_mu.quiver(x[::3,::3], y[::3,::3], mu_cyclic_u[::3,::3], mu_cyclic_v[::3,::3])
csquiv = m_mu.quiver(x[::1,::1], y[::1,::1], mu_cyclic_u[::1,::1], mu_cyclic_v[::1,::1])
plt.show()

Many thanks for your help :-)
Sabine

[so-many-problems]

oh no, just realised that maybe this isn't the right place to pose this question? have posted in on stack exchange but dont find where to delete this - sorry!

[tacaswell]

Can not delete, just close.

I will close this, re-open if you think you have found a bug.

the mailing list matplotilb-users@python.org is also a good place to ask "how do I..." questions.