In a dataframe with the structure below:
df = pd.DataFrame({'group_id': [0,0,0,1,1,1],
'x': [2,3,4,3,4,5],
'y': [5,6,7,2,2,5],
'z': [8,8,2,2,6,7]})
How to group data based on group_id values and calculate averages by group_id of columns x, y, z?
Expected output:
group_id | x | y | z
0 | 3 | 6 | 6
1 | 4 | 3 | 5
