2-D array multiplcation with N-D array

Question

I have two array X and Y. I am trying to find:

0.5x0 0.25x1 0.125x12 0.0625x3 0.03125x4 

and so on for other rows of X. Multiply values in Y(starting from 1st index) to values in each row of X.

So output array should be same size as X. Was wondering if there was any built in function available to achieve this?

Answer 1

You should just be able to use the * operator, and slice Y[1:] to drop the first element

>>> X * Y[1:]
array([[0.     , 0.25   , 1.5    , 0.1875 , 0.125  ],
       [2.5    , 4.     , 0.875  , 0.5    , 0.28125],
       [0.     , 2.75   , 1.5    , 0.8125 , 0.125  ],
       [7.5    , 4.     , 2.125  , 0.5    , 0.59375],
       [0.     , 0.25   , 1.5    , 0.1875 , 0.125  ],
       [2.5    , 4.     , 0.875  , 0.5    , 0.40625],
       [2.     , 3.75   , 0.     , 0.3125 , 0.     ]])