Create a nxn matrix with the same numbers on different rows

Hi,

I have done extensive searching to find a way to create a matrix that has rows 1-4 be 1 number, row 5 be another number and then row 6-20 be a 3rd number. is there any easy way to do that or do i have to hand create the matrix?

Answer 1

[Star Strider]

One way:

R14  = 3;       % Choose numbers for various rows
R5   = 5;
R620 = 7;

M = zeros(20);  % Preallocate

M(1:4,:)  = R14;
M(5,:)    = R5;
M(6:20,:) = R620;