按日期索引熊猫数据框

Question

I am trying to index my pandas dataframe by date by using:

df = pd.to_datetime(df)

but am getting the following error:

    ValueError: to assemble mappings requires at least that [year, month, day] 

    be specified: [day,month,year] is missing

My current pandas dataframe looks like this.

Answer 1

You're trying to convert the entire dataframe. Instead, you just want to apply the function to the dataframe index.

df.index = pd.to_datetime(df.index)