clc
clear all
% use of nested loops
% nested loop structure
disp('Nested loop structure')
for i=1:1:2
    for j=1:1:4
        for k=1:1:4
            fprintf('i=%g, j=%g, k=%g\n',i,j,k)
        end
    end
end
% Example 1
disp(' ')
disp('Example 1')
disp('Generate an Identity matrix of any size')
num=6; % number of rows and columns
for i=1:1:num
    for j=1:1:num
        if i==j
            I(i,j)=1;
        else
            I(i,j)=0;
        end
    end
end
disp('The generated matrix is:')
disp(I)
% Example 2
disp('Example 2')
disp('Generate a special matrix')
% INPUTS
row=3;
col=4;
for i=1:1:row
    for j=1:1:col
        S(i,j)=j;
    end
end
disp('The special matrix is:')
disp(S)
% Example 3
disp('Example 3')
disp('Generate a special matrix')
% INPUTS
row=4; % row number, can change
col=5; % column number, can change
for i=1:1:row
    for j=1:1:col
        A(i,j)=(i-1)*col+j;
    end
end
disp('Special Matrix:')
disp(A)
% Alternative method to generate the above matrix
disp('Example 3 - Alternative Method')
for c=1:1:col
    for r=1:1:row
        a(r,c)=(r*col-col)+c;
    end
end
disp('Alternative Method Special Matrix:')
disp(a)