Thomas

How is this different from the more simple approach:

idx = ceil(numel(alpha)*rand(n,w)) ;
words = alpha(idx)?

Note that the variable "word" is growing inside the lloop, making this algorithm potentially very slow.

A final and positive comment: the help is quite adequate with a description of the in- and outputs, the algorithm and an example. A "See Also" line, referencing RAND and RANDSAMPLE would improve it even further.