pandas describe by - additional parameters

Question

I see that the pandas library has a Describe by function which returns some useful statistics. However, is there a way to add additional rows to the output such as

Answer 1

Try this:

 df.describe()

      num1  num2
count   3.0   3.0
mean    2.0   5.0
std     1.0   1.0
min     1.0   4.0
25%     1.5   4.5
50%     2.0   5.0
75%     2.5   5.5
max     3.0   6.0

Build a second DataFrame.

 pd.DataFrame(df.mad() , columns = ["Mad"] ).T

         num1      num2
Mad  0.666667  0.666667

Join the two DataFrames.

 pd.concat([df.describe(),pd.DataFrame(df.mad() , columns = ["Mad"] ).T ])

          num1      num2
count  3.000000  3.000000
mean   2.000000  5.000000
std    1.000000  1.000000
min    1.000000  4.000000
25%    1.500000  4.500000
50%    2.000000  5.000000
75%    2.500000  5.500000
max    3.000000  6.000000
Mad    0.666667  0.666667

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