addition of two matrices in python
num = [2, 3, 4], [5, 6, 7] num2 = [8, 9, 10], [11, 12, 13] num3 = [0, 0, 0], [0, 0, 0] for i in range(len(num)): print(num[i]) for i in range(len(num)): print(num2[i]) print() for i in range (len(num)): for j in range(len(num)+1): num3[i][j] = num[i][j] + num2[i][j] for i in range(len(num3)): print(num3[i])
how to add two matrices in python
matrix1 = [[0, 1, 2], [3, 4, 5], [6, 7, 8]] matrix2 = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] def addTheMatrix(matrix1, matrix2): matrix1Rows = len(matrix1) matrix2Rows = len(matrix2) matrix1Col = len(matrix1[0]) matrix2Col = len(matrix2[0]) #base case if(matrix1Rows != matrix2Rows or matrix1Col != matrix2Col): return "ERROR: dimensions of the two arrays must be the same" #make a matrix of the same size as matrix 1 and matrix 2 matrix = [] rows = [] for i in range(0, matrix1Rows): for j in range(0, matrix2Col): rows.append(0) matrix.append(rows.copy()) rows = [] #loop through the two matricies and the summation should be placed in the #matrix for i in range(0, matrix1Rows): for j in range(0, matrix2Col): matrix[i][j] = matrix1[i][j] + matrix2[i][j] return matrix print(addTheMatrix(matrix1, matrix2)) #output = [[1, 3, 5], [7, 9, 11], [13, 15, 17]]
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