I have the following indexed DataFrame with named columns and rows not- continuous numbers:
a b c d 2 0.671399 0.101208 -0.181532 0.241273 3 0.446172 -0.243316 0.051767 1.577318 5 0.614758 0.075793 -0.451460 -0.012493
I would like to add a new column,
'e', to the existing data frame and do not want to change anything in the data frame (i.e., the new column always has the same length as the DataFrame).
0 -0.335485 1 -1.166658 2 -0.385571 dtype: float64
I tried different versions of
merge, but I did not get the result I wanted, only errors at most. How can I add column
e to the above example?