Why am I getting the value error for DatetimeIndex with a freq not set to None

Question

Getting an error while decomposing in time series.

This is my time series look like...2 years data with some zero values..

This is an error.

Please help !

help me removing the error so that I can proceed further

Answer 1

As mentioned in the comments, it seems like the Date index column is not of DatetimeIndex type.

You could use:

    import pandas as pd
    
    ts.index = pd.to_datetime(ts.index)

This is assuming Date is the index column. If not, then first use ts.set_index() function.

Answer 2

Use pd.Series.asfreq:

ts = ts.asfreq('d') 

to add a frequency to your DateTimeIndex of this pd.Series