@c Copyright (C) 1996, 1997, 2007 John W. Eaton
@c This is part of the Octave manual.
@c For copying conditions, see the file gpl.texi.

@node Sets
@chapter Sets

Octave has a limited set of functions for managing sets of data, where a
set is defined as a collection unique elements.  In Octave a set is
represented as a vector of numbers.

@DOCSTRING(create_set)

@DOCSTRING(unique)

@menu
* Set Operations:: 
@end menu

@node Set Operations
@section Set Operations

Octave supports the basic set operations.  That is, Octave can compute
the union, intersection, complement, and difference of two sets.
Octave can also supports the @emph{Exclusive Or} set operation, and
membership determination.  The functions for set operations all work in
pretty much the same way.  As an example, assume that @code{x} and
@code{y} contains two sets, then

@example
union(x, y)
@end example

@noindent
computes the union of the two sets.

@DOCSTRING(ismember)

@DOCSTRING(union)

@DOCSTRING(intersect)

@DOCSTRING(complement)

@DOCSTRING(setdiff)

@DOCSTRING(setxor)