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How can I make the program select a random element from an array. So:
A=[1 2 3 4] random= random element of A
I tried randsample(A,1) and randi(A) and neither worked so what can I do
21 Answer
Just use randi to generate a random index over the length of A. No fancy toolboxes needed:
>> A = [1 2 3 4]; >> x = A(randi(length(A),1)) x = 4 >> x = A(randi(length(A),1)) x = 3 etc.
randi(A) does not work because the first argument of randi is the bound of the random integer. Always check the docs:
>> help randi randi Pseudorandom integers from a uniform discrete distribution. R = randi(IMAX,N) returns an N-by-N matrix containing pseudorandom integer values drawn from the discrete uniform distribution on 1:IMAX. 
