%Matrix size
columns=10;
rows=4;
%Blank matrix
X = zeros(4,10);
%Fill matrix (1st row & first column)
newrow =-ones(1,columns); % the row to replace row 1 with
newcolumn=-ones(rows,1); % the column to replace column 1 with
X(1,:)= newrow ; % replace row 1 in a with new
X(:,1) = newcolumn(:); % replace column 1 in a with new
zi = find(X == 0);
X(zi) = [W; 5]'
X =
-1 -1 -1 -1 -1 -1 -1 -1 -1 -1
-1 21 24 27 30 33 36 39 42 45
-1 22 25 28 31 34 37 40 43 46
-1 23 26 29 32 35 38 41 44 5
