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How to shift data frame rows of specified column - Mekala - Jul-21-2020
Hi,
I have dataframe, I wan to define new column same as Column1, and re-arrange the new columns rows as:
new_col rows 0-end should be replaced with first column row1-end
import pandas as pd
df = pd.DataFrame({'Col1': [1, 2, 3, 4, 5],'Col2': [6, 7, 8, 9, 10],
'Col3': [11, 12, 13, 14, 15]})
df['new_col'] = df['Col1']
df[0:-1,'new_col']=df.ix[1:,'Col1']TypeError: unhashable type: 'slice'my desired output:
Col1 Col2 Col3 new_col 1 6 11 2 2 7 12 3 3 8 13 4 4 9 14 5 5 10 15 5
I use this way, and it works:
df['new_col']=df['new_col'].shift(-1)