How to multiply a vector by an array/matrix element-wise in numpy?

python numpy numpy-ndarray array-broadcasting elementwise-operations

With a and v as the two arrays, few approaches could be suggested -

a*v[:,None,None,None]a*v.reshape(-1, *[1]*3)(a.T * v).Tnp.einsum('i...,i->i...', a, v)

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