add two matrix by inputing data from keyboard

program for addition of matrix

multiplication

and transpose

Answers

•   
  

  #getting dimension of matrix
  
  print "enter n for nxn matrix"
  n = input()
  
  matrix1 = []
  matrix2 = []
  
  #taking elements of first matrix
  
  print "Enter elements of first matrix"
  for i in range(0,n):
  
    #taking elements of first column
  
    print "Enter elements of ",i,"column, seperated by space"
  
    #raw_input().split() will split the string
    #'1 2 34'.split() will give ['1', '2', '34']
    #map will convert its elements into integers [1, 2, 34]
  
    matrix1.append(map(int,raw_input().split()))
  
  print "Matrix 1 is",matrix1
  
  #taking elements of second matrix
  
  print "Enter elements of second matrix"
  for i in range(0,n):
    #Similar to input taken for 1 matrix
  
    print "Enter elements of ",i,"column, seperated by space"
    matrix2.append(map(int,raw_input().split()))
  
  print "Matrix 2 is",matrix2
  
  #adding
  
  add_matrix = []
  for i in range(0,n):
    a = []
    for j in range(0,n):
  
  
      #making a addition matrix's column to append
      #making a 1D matrix with elements as sum of elements of
      #respective columns of both matrices
  
      a.append(matrix1[i][j]+matrix2[i][j])
    add_matrix.append(a)
  print "Addition of matrix is",add_matrix
  
  #multiplication
  multi_matrix = []
  for i in range(0,n):
    a = []
    for j in range(0,n):
      summ = 0
      for k in range(0,n):
        summ = summ+(matrix1[i][k]*matrix2[k][j])
      a.append(summ)
    multi_matrix.append(a)
  print "matrix1 x matrix 2 =",multi_matrix
  
  #transpose of matrix1
  
  tr_matrix=[]
  
  for i in range(0,n):
    a = []
    for j in range(0,n):
  
      #matrix1[j][i] will give row of matrix 1
      #we are making it column of new matrix
      a.append(matrix1[j][i])
    tr_matrix.append(a)
  
  print "Transpose of matrix 1 is",tr_matrix
  

  Sample input and output

  enter n for nxn matrix
  3
  Enter elements of first matrix
  Enter elements of  0 column, seperated by space
  4 5 8
  Enter elements of  1 column, seperated by space
  9 3 1
  Enter elements of  2 column, seperated by space
  5 8 9
  Matrix 1 is [[4, 5, 8], [9, 3, 1], [5, 8, 9]]
  Enter elements of second matrix
  Enter elements of  0 column, seperated by space
  7 8 9
  Enter elements of  1 column, seperated by space
  5 6 8
  Enter elements of  2 column, seperated by space
  7 2 6
  Matrix 2 is [[7, 8, 9], [5, 6, 8], [7, 2, 6]]
  Addition of matrix is [[11, 13, 17], [14, 9, 9], [12, 10, 15]]
  matrix1 x matrix 2 = [[109, 78, 124], [85, 92, 111], [138, 106, 163]]
  Transpose of matrix 1 is [[4, 9, 5], [5, 3, 8], [8, 1, 9]]
  

  
  

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