Divide DataFrame by first row

Question

I have checked the documentation. I don\'t understand the way to index a Pandas DataFrame.

I would like to divide a DataFrame of stock prices by their respective initial

Answer 1

In [193]: df
Out[193]:
   A  B  C  D
a  1  8  9  1
b  5  4  3  6
c  4  6  1  3
d  1  0  2  9

In [194]: df.divide(df.ix[0] / 100)
Out[194]:
     A    B           C    D
a  100  100  100.000000  100
b  500   50   33.333333  600
c  400   75   11.111111  300
d  100    0   22.222222  900