Create some simple Matlab code that will generate square matrices that have ones above the leading diagonal, and zeros on and below the leading diagonal.

I need to use simple codes like if, for, while, elseif...etc statments.

example of end product: [0 1 1 1;0 0 1 1;0 0 0 1;0 0 0 0 ]

Answer 1

[Image Analyst]

Hint:

A = triu(ones(4))

A = 4×4

1 1 1 1 0 1 1 1 0 0 1 1 0 0 0 1

% Or, you can use your code, with r <= c instead of r < c
nrows = 4; % number of row
ncols = 4; % number of column
A = zeros(nrows,ncols); % Initialize to all zeros.
for c = 1:ncols
    for r = 1:nrows        
        if r<=c
            A(r,c) = 1;
        end        
    end
end
A

A = 4×4

1 1 1 1 0 1 1 1 0 0 1 1 0 0 0 1

Answer 2

[Arif Hoq]

nrows = 4; % number of row
ncols = 4; % number of column
A = randi([1 10],nrows,ncols); % creating random integer number between 1 to 10.
for c = 1:ncols
    for r = 1:nrows        
        if r == c
            A(r,c) = 0;
        elseif r<c
            A(r,c) = 1;
        else
            A(r,c) = 0;
        end        
    end
end
A

A = 4×4

0 1 1 1 0 0 1 1 0 0 0 1 0 0 0 0

[Walter Roberson]

Not sure what the random initialization is intended to do for you, other than to waste time ?