Is there a pythonic way to do a contingency table in Pandas?

Question

Given a dataframe that looks like this:

            A   B      
2005-09-06  5  -2  
2005-09-07 -1   3  
2005-09-08  4   5 
2005-09-09 -8   2
2005-09-10 -2  -         


        

Answer 1

Here's a really useful page about the pandas crosstab function:

http://chrisalbon.com/python/pandas_crosstabs.html

So I think for what you'd like to do you should use

import pandas as pd
pd.crosstab(data['A']>0, data['B']>0)

Hope that helps!