How to create row matrix?

I have Nc=3 and want to get row matrix as A=[1;1;1;-1;-1;-1] so what will be it's command.If I vary value of Nc rows change accordingly.I need generalized formula for that

Answer 1

[Matt J]

The matrix A that you've shown is a column vector, not a row vector. Giving just one example for A doesn't explain the pattern you're looking for, but I'm guessing this is what you want

    A=[ones(Nc,1); -ones(Nc,1)];