np.multiply or pd.mul but what multiplying array to use depends on conditions

Mastering Conditional Multiplication0:02:00

Mastering Conditional Multiplication in DataFrames Using np.multiply and pd.mul

stat243-fall-2013 Class 280:49:16

stat243-fall-2013 Class 28 (Nov. 4, 2013)

RTU 5th sem0:11:32

RTU 5th sem compiler design important questions | Most questions of compiler design