DailyCoding/Day_16.py at master · iamakkkhil/DailyCoding · GitHub

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"""
DAY 16 : Different Operations on Matrices.
https://www.geeksforgeeks.org/different-operation-matrices/

QUESTION : Perform Addititon, Subtraction and Multiplication on given Matrices.

"""


def add(matrix1, matrix2, n1, m1, n2, m2):
    # n = no of rows
    # m = no of columns
    add = []
    if n1 == n2 and m1 == m2:
        for i in range(n1):
            inner = []
            for j in range(m1):
                sum_ = matrix1[i][j] + matrix2[i][j]
                inner.append(sum_)
            add.append(inner)
        print(f'Addition is : {add}')
    else:
        print(f'Addition not possible')

def sub(matrix1, matrix2, n1, m1, n2, m2):
    # n = no of rows
    # m = no of columns
    sub = []
    if n1 == n2 and m1 == m2:
        for i in range(n1):
            inner = []
            for j in range(m1):
                sum_ = matrix1[i][j] - matrix2[i][j]
                inner.append(sum_)
            sub.append(inner)
        print(f'Subtraction is : {sub}')
    else:
        print(f'Subtraction not possible')

def multiply(matrix1, matrix2, n1, m1, n2, m2):
    # n = no of rows
    # m = no of columns
    multiply = []
    if m1 == n2:
        for i in range(len(matrix1)):
            inner = []
            sum = 0
            for j in range(len(matrix2[0])):
                sum = 0
                for k in range(len(matrix2)):
                    sum += matrix1[i][k] * matrix2[k][j]
                inner.append(sum)
            multiply.append(inner)

        print(f'Multiplication is : {multiply}')
    else:
        print(f'Multiplication not possible')


matrix1 = [[1,2], [3,4], [5,6]]
matrix2 = [[5,6,7], [7,8,9]]

add(matrix1, matrix2, 2,3,3,2)