Add Cumulative Distribution Function Plotting

[trobin]

Please could you add this functionality on top of the already existing kde functionality.

[fx86]

+1

[yimingji]

+1

[jtratner]

@yimingji @fx86 @trobin can you provide test cases and expected output? (just so we're clear and for those of us who may not use cdf on a regular basis). No promises, but at least test cases and API will make it more likely to get attention.

[yimingji]

@jtratner @fx86 @trobin

After a bit more research, it seems that the Matplotlib has already have the function for plotting CDF. See the 3rd example on http://matplotlib.org/examples/pylab_examples/histogram_demo_extended.html.

relevant args:
pd.hist(..., cumulative=True,normed=1)

[cpcloud]

@yimingji That PR would be pretty easy then! Want to give it a shot?

[yimingji]

@cpcloud I thought it was already implemented...
Anyway, I am a newbie in Python. I do not think I can contribute anything as for now.

[TomAugspurger]

I'll get to this sometime in the next month. Just commenting so I don't forget.

[TomAugspurger]

@y-p can be closed by #5700 has out of scope for pandas.

[jreback]

@TomAugspurger maybe contribute this to statsmodels?

[ghost]

opened FR on seaborn.

[ghost]

CDF plots have landed in seaborn git master: mwaskom/seaborn#93