How to replace a row in a matrix using colon notation with another row

How do i replace a row in a matrix with another row using colon notation?

Matrix=[1,1,1;2,2,2;3,3,3;4,4,4]

Matrix = 4×3

1 1 1 2 2 2 3 3 3 4 4 4

ReplaceRow=[0,0,0]

ReplaceRow = 1×3

0 0 0

end result matrix would be

desired = [0,0,0;2,2,2;3,3,3;4,4,4]

desired = 4×3

0 0 0 2 2 2 3 3 3 4 4 4

Answer 1

[Walter Roberson]

Matrix=[1,1,1;2,2,2;3,3,3;4,4,4]

Matrix = 4×3

1 1 1 2 2 2 3 3 3 4 4 4

ReplaceRow=[0,0,0]

ReplaceRow = 1×3

0 0 0

desired = Matrix;
desired(1,:) = ReplaceRow

desired = 4×3

0 0 0 2 2 2 3 3 3 4 4 4