UNIQUE UNIQUE Unique

Usage

Returns a vector containing the unique elements of an array.  The first
form is simply

   y = unique(x)

where x is either a numerical array or a cell-array of strings.  The 
result is sorted in increasing order.  You can also retrieve two sets
of index vectors

   [y, m, n] = unique(x)

such that y = x(m) and x = y(n).  If the argument x is a matrix,
you can also indicate that FreeMat should look for unique rows in the
matrix via

   y = unique(x,'rows')

and

   [y, m, n] = unique(x,'rows')

