Plotting of millisecond frequency broken
from stackoverflow:

I am trying to create a plot waith an x range of e.g. 500 milliseconds.

rng = date_range(s,periods=500,freq="U")
df = DataFrame(randn(500),index=rng,columns=["A"])

to plot column A:

df["A"].plot()
The whole plot will be squeezed into a single spike because the x range is defined from Jan-2011 until Jul-2014.

Is there a way to change this?
