numpy.outer() function - Python

numpy.outer() function compute the outer product of two vectors.

Syntax : numpy.outer(a, b, out = None) Parameters : a : [array_like] First input vector. Input is flattened if not already 1-dimensional. b : [array_like] Second input vector. Input is flattened if not already 1-dimensional. out : [ndarray, optional] A location where the result is stored. Return : [ndarray] Returns the outer product of two vectors. out[i, j] = a[i] * b[j]

Code #1 : Output :

[[-1. 0. 1. 2.]
 [-1. 0. 1. 2.]
 [-1. 0. 1. 2.]
 [-1. 0. 1. 2.]]

  Code #2 : Output :

[[-2. -1. 0. 1. 2.]
 [-2. -1. 0. 1. 2.]
 [-2. -1. 0. 1. 2.]
 [-2. -1. 0. 1. 2.]
 [-2. -1. 0. 1. 2.]]