how do I generate a random signal with each point being -1 or +1 in MATLAB

to generate a s_n∈{+1,-1}

with an example:

1,-1,1,1,-1,1,-1,-1,-1,-1,1,1,-1,-1,1,-1

Answer 1

[Rik]

randi([0 1],1,N)*2-1

That should do it. Or even this:

sign(rand(1,N)-0.5)

Although it is possible that generates a 0 if rand happens to land exactly on 0.5.

[Qi]

Thank you very much!