Create a unitary step entrance with n points

How can i create a vector 1*200 with ones in the first 100 numbers and zeros in the rest. I wanna study the outpout response of a system to this entrance. x(n)=u(n)-u(n-1) with n=200 ssamples.

Answer 1

[Guillaume]

You just concatenate your vector of 100 ones with your vector of 100 zeros:

v = [ones(1, 100) zeros(1, 100)];