How can I remove the baseline from pandas dataframe?

Question

I have a dataframe that, after applying a butter bandpass, looks as follows:

So far I have tried using

newdataframe = signal.detrend(df)

However, this changes the format from a data frame to an array. Is there a way of removing the baseleine from a pandas DataFrame and keep it in this format?

Answer 1

Assign the values back to the dataframe:

df.loc[:] = signal.detrend(df)