Question

Given the elements of a 3 × 3 matrix as the nine variables a11, a12, ... a33,
produce a string representation of the matrix using formatting methods, (a) assuming
the matrix elements are (possibly negative) real numbers to be given to one decimal
place; (b) assuming the matrix is a permutation matrix with integer entries taking the
values 0 or 1 only. In the Python language.

Answer 1

# (a)

# negative real number with one decimal digit

from numpy import * 

mat = array([[-1.2, -3.4, -5.4],[-0.2, -0.1, -4.1],[-9.8, -9.5, -9.7]])

for i in range(len(mat)):
    for j in range(len(mat[i])):
        print(str(mat[i][j]), end = ' ')

# (b)

# integer with 1 or 0 values

from numpy import * 

mat = array([[1, 0, 0],[0, 1, 1],[1, 1, 1]])

for i in range(len(mat)):
    for j in range(len(mat[i])):
        print(str(mat[i][j]), end = ' ')