mask and proper index
I am trying to apply a mask to my dataframe:
mask = (df['datatime'] > start_date) & (df['datatime'] <= end_date)
df = df.loc[mask]
It seems to work pretty well.
After that I crate the cumulative of its element as:
PP_cumPP = np.cumsum(df[PP_station])
However, I am not able to compute PP_cumPP last element. Indeed, when I do
and when I try to do:
I get an error.
What I am doing wrong?
Thanks a lot for any kind of help