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C++ API

: unique (x)

: unique (x, "rows")

: [y, i, j] = unique (…)

: [y, i, j] = unique (…, "first")

: [y, i, j] = unique (…, "last")

Return the unique elements of x sorted in ascending order.

If the input x is a column vector then return a column vector; Otherwise, return a row vector. x may also be a cell array of strings.

If the optional argument "rows" is given then return the unique rows of x sorted in ascending order. The input must be a 2-D matrix to use this option.

If requested, return index vectors i and j such that y = x(i) and x = y(j).

Additionally, if i is a requested output then one of "first" or "last" may be given as an input. If "last" is specified, return the highest possible indices in i, otherwise, if "first" is specified, return the lowest. The default is "last".

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

Package: octave