(Python Tutorials for Citizen Data Scientist)
Python Code to Add Two Matrices
In this program, you’ll learn to add two matrices using Nested loop and Next list comprehension, and display it.
In Python, we can implement a matrix as a nested list (list inside a list). We can treat each element as a row of the matrix.
X = [[1, 2], [4, 5], [3, 6]] would represent a 3×2 matrix. First row can be selected as
X and the element in first row, first column can be selected as
We can perform matrix addition in various ways in Python. Here are a couple of them.
Source code: Matrix Addition using Nested Loop
# Program to add two matrices using nested loop X = [[12,7,3], [4 ,5,6], [7 ,8,9]] Y = [[5,8,1], [6,7,3], [4,5,9]] result = [[0,0,0], [0,0,0], [0,0,0]] # iterate through rows for i in range(len(X)): # iterate through columns for j in range(len(X)): result[i][j] = X[i][j] + Y[i][j] for r in result: print(r)
[17, 15, 4] [10, 12, 9] [11, 13, 18]
In this program we have used nested
for loops to iterate through each row and each column. At each point, we add the corresponding elements in the two matrices and store it in the result.
Source Code: Matrix Addition using Nested List Comprehension
# Program to add two matrices using list comprehension X = [[12,7,3], [4 ,5,6], [7 ,8,9]] Y = [[5,8,1], [6,7,3], [4,5,9]] result = [[X[i][j] + Y[i][j] for j in range(len(X))] for i in range(len(X))] for r in result: print(r)
List comprehension allows us to write concise codes and we must try to use them frequently in Python. They are very helpful.
Python Examples for Beginners: Python Code to Add Two Matrices
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