Pandas: add crosstab totals

Question

How can I add to my crosstab an additional row and an additional column for the totals?

df = pd.DataFrame({\"A\": np.random.randint(0,2,100), \"B\" : np.rand         


        

Answer 1

This is because 'attribute-like' column access does not work with integer column names. Using the standard indexing:

In [122]: ct["Total"] = ct[0] + ct[1]

In [123]: ct
Out[123]:
B   0   1  Total
A
0  26  24     50
1  30  20     50

See the warnings at the end of this section in the docs: http://pandas.pydata.org/pandas-docs/stable/indexing.html#attribute-access

When you want to work with the rows, you can use .loc:

In [126]: ct.loc["Total"] = ct.loc[0] + ct.loc[1]

In this case ct.loc["Total"] is equivalent to ct.loc["Total", :]