重新采样熊猫数据框

Question

I have this:

                       date   emaslow
105857  2017-10-24 22:50:00  0.000037
105858  2017-10-24 22:55:00  0.000037
105859  2017-10-24 23:00:00  0.000037

It is a huge data set, this is only the tail(3) bit and the date and emaslow columns. I am trying to resample this a little bit so I get a smoother plot. But no matter what I do, I get the nasty:

TypeError: Only valid with DatetimeIndex, TimedeltaIndex or PeriodIndex, but 
got an instance of 'RangeIndex'

I tried to set and reset the index with df.reset_index() and df.set_index('date')

But with no luck.

I am trying to get a smoother, version of the red plot. The blue one is wrong and it is just a place holder.

Answer 1

Are you looking for resample , you can change the sum to mean or whatever you need.

df.set_index('date').resample('10T').sum()
Out[502]: 
                      emaslow
date                         
2017-10-24 22:50:00  0.000074
2017-10-24 23:00:00  0.000037