MATLAB: Random number within a rwo vector

random number generator

I have a row vector say

>> A
A =[ -29  -17  -11  -10 -8 -8  -7  -2 -1  3 3  3  8 13  14]

I want to randomly generate a number within this A only.

How to do this?

A(ceil(rand*numel(A)))

idx = [1,2,4,7,8];
out = zeros(10,1);
out(idx)=rand(numel(idx),1);

To randomize uniformly over an interval [lower, upper], you would do,

out=rand(___)*(upper-lower)+lower