Is there a way to apply a custom function to a group using the groupby function of a vaex DataFrameArray?
I can do:
df_vaex.groupby(['col_x1','col_x2','col_x3','col_x4'], agg=vaex.agg.mean(df_vaex['col_y']))
But is there a way to do pandas:
df.groupby(['col_x1','col_x2','col_x3','col_x4']).apply(lambda x: my_own_function(x['col_y']))