Take: Difference between revisions

Take (<code>↑</code>) is a [[primitive function]] which shortens or extends an array along one or more [[Axis|axes]]. The [[vector]] left argument indicates the lengths of result axes, with a sign to denote whether elements should be taken starting from the beginning or end of each axis. Take was introduced in [[APL\360]] with the requirement that the left argument length match the right argument rank, and was extended in [[SHARP APL 19.0]] to allow short left arguments. It is closely related to [[Drop]], which removes the parts of each axis that Take would include.