Element replacement of matrix.

How do I replace each element in third row of the 5*4 matrix with its corresponding column number using for loop?

Answer 1

[David K.]

If using a for loop is not actually a requirement you can do this very simply as such:

myMatrix = rand(5,4); % create 5x4 matrix
myMatrix(3,:) = 1:4; % replace values

If the for loop is a requirement:

myMatrix = rand(5,4); % create 5x4 matrix
for n = 1:4
    myMatrix(3,n) = n;
end