How do you change an entire row or column of an array to a certain value

If I have an array of all zeros X = zeros(N) How do I change a column to a value I want.

Answer 1

[Star Strider]

One option:

N = 5;
X = zeros(N);
X(:,3) = rand(N, 1);                                    % Change Column #3 To A Specific Vector
X(2,:) = 5*ones(1, N);                                  % Change Row #2 To a Row Of ‘5’

[Carlye Favella]

Thank you!!!!!

[Star Strider]

Carlye Favella —

My pleasure!

[Riley Harris]

Can this be done using a for loop and if/elseif statements?

[Star Strider]

@Riley Harris — Yes, however it can easily be vectorised. Using the sub2ind function is another option.

See the documentation section on Matrix Indexing for details.