np_dot_vs_operator_*

gistfile1.txt

import numpy as np

# Example 1
vec1 = np.array([1, 2])
vec2 = np.array([2, 3])

vec1*vec2
# Return
# array([2, 6])

np.dot(vec1, vec2)
# Return
# 8


# Example 2
vec3 = np.array([[1, 2], [3, 4]])
vec4 = np.array([1, 2])

vec3*vec4

# Return
# array([[1, 4], [3, 8]])

np.dot(vec3, vec4)

# Return
# array([5, 11])


# Example 3
vec5 = np.array([[1, 2, 3], [4, 5, 6]])
vec6 = np.array([1, 2])

vec5.T*vec6
# Return
# array([[1, 8], [2, 10], [3, 12]])

np.dot(vec5.T, vec6)
# Return
# array([9, 12, 15])