Setup

matplotlib.__version__= 1.5.1 (installed as part of anaconda distribution)
Python 3.4.4
OS X

Issue

Code from examples/units/radian_demo.py with minor modifications:

import numpy as np
from basic_units import radians, degrees, cos
from matplotlib.pyplot import figure, show

x = [val*radians for val in np.arange(0, 15, 0.01)]

fig = figure()

ax = fig.add_subplot(121, projection='polar')
line1, = ax.plot(x, np.array(cos(x))+1, xunits=radians)

ax = fig.add_subplot(122, projection='polar')
line2, = ax.plot(x, np.array(cos(x))+1, xunits=degrees)

show()

Notes

Note that the plot on the left is correct, but the angular tick labels aren't incrementing correctly. I can't tell if this is an issue with the basic_units.py example implementation or the units interface.

If it seems like a straightforward fix, I'd be happy to take a look at it: the units interface is really slick and it would be great to get this working with polar coordinates too.