How to use numpy's "prod" function

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Release date:2022/6/19　　　　　　　　　

・In Japanese

■Description of the prod function

Do the product of the arrays.

■Specific example using prod function

import numpy as np

a = np.array([[5, 50, 10],[20,-10,1]])
np.prod(a)　# Product of all elements

　⇒ -500000　# 5*50*10*20*-10*1

np.prod(a,axis=0)　# Product of elements between columns

　⇒ array([ 100, -500, 10])　# [5*20, 50*-10 , 10*1]

np.prod(a,axis=1)　# Product of elements between rows

　⇒ array([2500, -200])　# [5*50*10 , 20*-10*1]

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