System: python 3.3 on linux mint pandas 0.15.1 matplotlib 1.4.2 Description of the problem: Trying to use collections.BrokenBarHCollection.span_where() with pandas timeseries as x values throws an ...

# If applicable, paste the console output here ----- ImportError Traceback (most recent call last) <ipython-input-1-f09a4c6b4388> in <module>() 1 import numpy as np ...