Python-元素矩阵差异
原文:https://www . geesforgeks . org/python-element-wise-matrix-difference/
给定两个矩阵，任务是编写一个 Python 程序来执行元素差异。
示例:
输入 : test_list1 = [[2，4，5]，[5，4，2]，[1，2，3]]，test_list2 = [[6，4，6]，[9，6，3]，[7，5，4]] 输出 : [[4，0，1]，[4，2，1]，[6，3，1]] 解释:6–2 = 4，4–4 = 0，6–5 等等。
输入 : test_list1 = [[2，4，5]，[1，2，3]]，test_list2 = [[6，4，6]，[7，5，4]] 输出 : [[4，0，1]，[6，3，1]] 解释:6–2 = 4，4–4 = 0，6–5 = 1。等等。
方法#1:使用 loop + zip()
在本例中，我们使用 zip 执行合并行和行内索引的任务，嵌套循环用于遍历所有行的所有元素。
Python 3
# Python3 code to demonstrate working of
# Element-wise Matrix Difference
# Using loop + zip()
# initializing lists
test_list1 = [[2, 4, 5], [5, 4, 2], [1, 2, 3]]
test_list2 = [[6, 4, 6], [9, 6, 3], [7, 5, 4]]
# printing original lists
print("The original list 1 is : " + str(test_list1))
print("The original list 2 is : " + str(test_list2))
res = []
# iterating for rows
for sub1, sub2 in zip(test_list1, test_list2):
temp = []
# iterate for elements
for ele1, ele2 in zip(sub1, sub2):
temp.append(ele2 - ele1)
res.append(temp)
# printing result
print("The Matrix Difference : " + str(res))
Output
The original list 1 is : [[2, 4, 5], [5, 4, 2], [1, 2, 3]]
The original list 2 is : [[6, 4, 6], [9, 6, 3], [7, 5, 4]]
The Matrix Difference : [[4, 0, 1], [4, 2, 1], [6, 3, 1]]
在本文中，我们使用 zip()执行压缩任务，并使用列表理解以一种线性方式解决这个问题。
Python 3
# Python3 code to demonstrate working of
# Element-wise Matrix Difference
# Using loop + zip()
# initializing lists
test_list1 = [[2, 4, 5], [5, 4, 2], [1, 2, 3]]
test_list2 = [[6, 4, 6], [9, 6, 3], [7, 5, 4]]
# printing original lists
print("The original list 1 is : " + str(test_list1))
print("The original list 2 is : " + str(test_list2))
# using list comprehension to perform task in one line
res = [[ele2 - ele1 for ele1, ele2 in zip(sub1, sub2)]
for sub1, sub2 in zip(test_list1, test_list2)]
# printing result
print("The Matrix Difference : " + str(res))
Output
The original list 1 is : [[2, 4, 5], [5, 4, 2], [1, 2, 3]]
The original list 2 is : [[6, 4, 6], [9, 6, 3], [7, 5, 4]]
The Matrix Difference : [[4, 0, 1], [4, 2, 1], [6, 3, 1]]
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