Resample with how='median' broken in some cases

[wesm]

No description provided.

[wesm]

Can't reproduce this. I think it was fixed between 0.8 and master (hit the bug during SciPy tutorial)

[eloraburns]

I've reproduced something using how="median". It seems to hit when there are discontinuities in the resampling (i.e. minutes with no records when downsampling).

Both pandas 0.8.1 and 0.8.2.dev-f5a74d4 don't like it:

import pandas as pd
from datetime import datetime
d = pd.DataFrame([1, 2], index=[datetime(2012,1,1,0,0,0), datetime(2012,1,1,0,5,0)])
d.resample("T", how="median")
# Throws AssertionError

Github won't let me re-open this ticket, so I've opened #1688 instead (and commented here).