Union

Usage

• Union[, , ... ] gives a sorted list of all the distinct elements that appear in any of the .
• Union[list] gives a sorted version of a list, in which all duplicated elements have been dropped.

Notes

• If the

are considered as sets, Union gives their union.

• Union[

, ... ] can be input in StandardForm and InputForm as

... . The character

can be entered as

or \[Union].

• The

must have the same head, but it need not be List.

• Union[

, ... , SameTest->test] applies test to each pair of elements in the

to determine whether they should be considered the same.

• See Section 1.8.7 and Section 1.8.8.

• See also: Join, Intersection, Complement, Split.

• New in Version 1; modified in 3.

Further Examples