Sets - Untitled
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## 26 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.

— Function File: create_set (x)

> Return a row vector containing the unique values in x, sorted in ascending order. For example,

>               create_set ([ 1, 2; 3, 4; 4, 2 ])
>               => [ 1, 2, 3, 4 ]

> See also: union, intersection, complement.

— Function File: unique (x)

> Return the unique elements of x, sorted in ascending order. If x is a row vector, return a row vector, but if x is a column vector or a matrix return a column vector. — Function File: unique (A, 'rows')

> > Return the unique rows of A, sorted in ascending order. — Function File: [y, i, j] = unique (x)

> > > Return index vectors i and j such that `x(i)==y` and `y(j)==x`.

> > > See also: union, intersect, setdiff, setxor, ismember.