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matrix-matrix product.py
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matrix-matrix product.py
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Write a program to do the following:
• Find the vector –matrix multiplication of a r by c matrix M with an c-vector u.
• Find the matrix-matrix product of M with a c by p matrix N.
def print_matrix(matrix):
for i in range(len(matrix)):
for j in range(len(matrix[0])):
print(matrix[i][j],"\t",end=" ")
print("\n")
m = int(input("Enter the rows for the first matrix::"))
n = int(input("Enter the columns for the first matrix::"))
p = int(input("Enter the rows for the second matrix::"))
q = int(input("Enter the columns for the second matrix::"))
if(n!=p):
print("Matrix multipilication is not possible")
exit()
array1=[[0 for j in range (0 , n)] for i in range (0 , m)]
array2=[[0 for j in range (0 , q)] for i in range (0 , p)]
result=[[0 for j in range (0 , q)] for i in range (0 , m)]
print("Enter elements of the first matrix::")
for i in range(0,m):
for j in range(0,n):
array1[i][j] = int(input("Enter the element::"))
print("Enter elements of the second matrix::")
for i in range(0,p):
for j in range(0,q):
array2[i][j] = int(input("Enter the element::"))
print("The First Matrix::")
print_matrix(array1)
print("The Second Matrix::")
print_matrix(array2)
for i in range(0,m):
for j in range(0,q):
for k in range(0,n):
result[i][j] += array1[i][k] * array2[k][j]
print("Multiplication of two matrices::")
print_matrix(result)