hnrnd
              Random arrays from the half-normal distribution.
 r = hnrnd (mu, sigma) returns an array of random
 numbers chosen from the half-normal distribution with location parameter
 mu and scale parameter sigma.  The size of r is the common
 size of mu and sigma.  A scalar input functions as a constant
 matrix of the same size as the other inputs.
 When called with a single size argument, hnrnd 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 half-normal distribution can be found at https://en.wikipedia.org/wiki/Half-normal_distribution
See also: hncdf, hninv, hnpdf, hnfit, hnlike, hnstat
Source Code: hnrnd