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I'm trying to use the fft function in matlab to compute the discrete fourier transform of a box signal. I'm told to assume that the signal x[n] is periodic with period N and the vector contains one period.

x[n]= box [n]

I'm am going to use these commands to make my vector

x=zeros(1,N)

x(N1,N2)=1

But I'm asked to justify my choise of N, N1 and N2

And I cant really figure out what values to pick for N, N1, N2.

If my vector is for example [ 0 0 0 0 1 1 1 0 0 0]

does that count as one period?