betarnd
              Random arrays from the Beta distribution.
 r = betarnd (a, b) returns an array of random
 numbers chosen from the Beta distribution with shape parameters a and
 b.  The size of r is the common size of a and b.
 A scalar input functions as a constant matrix of the same size as the other
 inputs.
 When called with a single size argument, betarnd returns a square
 matrix with the dimension specified.  When called with more than one scalar
 argument, the first two arguments are taken as the number of rows and columns
 and any further arguments specify additional matrix dimensions.  The size may
 also be specified with a row vector of dimensions, sz.
Further information about the Beta distribution can be found at https://en.wikipedia.org/wiki/Beta_distribution
See also: betacdf, betainv, betapdf, betafit, betalike, betastat
Source Code: betarnd