[Python (py3)] Please modify my code below such that Matrix A and Matrix B can be added if the dimension of Matrix A is equal to the dimension of Matrix B. When the dimension of Matrix A is not equal to the dimension of Matrix B, print "Matrix addition cannot be performed; dimensions are unequal." The input will come from file1.txt, and the output should only be printed to output.txt Format of the input from file1.txt: First Line: type of operation (add) Second Line: matrix A dimension (example: if 3 rows and 2 columns, type 3 2) Third Line: matrix A elements Fourth Line: matrix B dimension Fifth Line: matrix B elements Sample input 1: add 2 3 53 -4 1 7 31 2 2 3 67 2 2 -34 6 3 Sample output 1: 120 -2 3 -27 37 5
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[Python (py3)]
Please modify my code below such that Matrix A and Matrix B can be added if the dimension of Matrix A is equal to the dimension of Matrix B.
When the dimension of Matrix A is not equal to the dimension of Matrix B, print "Matrix addition cannot be performed; dimensions are unequal."
The input will come from file1.txt, and the output should only be printed to output.txt
Format of the input from file1.txt:
First Line: type of operation (add)
Second Line: matrix A dimension (example: if 3 rows and 2 columns, type 3 2)
Third Line: matrix A elements
Fourth Line: matrix B dimension
Fifth Line: matrix B elements
Sample input 1:
add
2 3
53 -4 1
7 31 2
2 3
67 2 2
-34 6 3
Sample output 1:
120 -2 3
-27 37 5
Sample input 2:
add
2 2
53 -4
7 31
2 3
67 2 1
-34 6 2
Sample Output 2:
Matrix addition cannot be performed; dimensions are unequal.
----------------------------------------------------------------------
import numpy as np
import sys
f1 = open("file1.txt","r")
lines = f1.readlines()
dim = lines[1].split()
k=2
mat1 = np.empty((0,int(dim[0])), int)
for i in range(0,int(dim[0])):
l = lines[k].split()
l = list(map(int, l))
ls = np.array([l])
k += 1
mat1 = np.append(mat1, ls, axis=0)
dim2 = lines[k].split()
k += 1
if dim != dim2:
sys.exit("Matrix addition cannot be performed; dimensions are unequal.")
mat2 = np.empty((0,int(dim2[0])), int)
for i in range(0,int(dim2[0])):
l = lines[k].split()
l = list(map(int, l))
ls = np.array([l])
k += 1
mat2 = np.append(mat2, ls, axis=0)
print(np.add(mat1,mat2))
f2 = open("output.txt","w")
s = np.add(mat1,mat2)
# write output matrix in output.txt file
for i in range(0, len(s)):
for j in range(0, len(s[i])):
line = str(s[i][j])+" "
f2.write(line)
f2.write("\n")
# close the output file
f2.close()
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