I have a dataframe like below. The column Mfr Number is a categorical data type. I'd like to preform get_dummies or one hot encoding on it, but instead of filling in the new column with a 1 if it's from that row, I want it to fill in the value from the quantity column. All the other new 'dummies' should remain a 0 on that row. Is this possible?
Datetime Mfr Number quantity
0 2016-03-15 07:02:00 MWS0460MB 1
1 2016-03-15 07:03:00 TM-120-6X 3
2 2016-03-15 08:33:00 40.50699.0095 5
3 2016-03-15 08:42:00 40.50699.0100 1
4 2016-03-15 08:46:00 CXS-04T098-00-0703R-1025 10
Do it in two steps:
dummies = pd.get_dummies(df['Mfr Number'])
dummies.values[dummies != 0] = df['Quantity']
Check with str.get_dummies and mul
df.Number.str.get_dummies().mul(df.quantity,0)
40.50699.0095 40.50699.0100 ... MWS0460MB TM-120-6X
0 0 0 ... 1 0
1 0 0 ... 0 3
2 5 0 ... 0 0
3 0 1 ... 0 0
4 0 0 ... 0 0
[5 rows x 5 columns]
df = pd.get_dummies(df, columns = ['Mfr Number'])
for col in df.columns[2:]:
df[col] = df[col]*df['quantity']
来源：https://stackoverflow.com/questions/55271858/pandas-get-dummies-with-value-from-another-column