# Changes

Jump to navigation
Jump to search
~~Additionally, ~~== Operators ==The following [[operator]]s may admit axis specification:* [[~~reduction~~Reduction]] ~~and ~~removes the specified right argument axis.* [[~~scan~~Scan]] ~~operators may admit ~~works on the specified right argument axis ~~specification~~. In [[Dyalog APL]], a slash with axis retains its [[function-operator overloading]]: it can be applied as an operator or as a dyadic function ([[Replicate]] or [[Expand]]).

In many APLs the behavior of a function may be modified using bracket notation, for example <source lang=apl inline>⌽[2]</source> to [[Rotate]] along the second [[axis]]. Axis specification was a feature of [[Iverson notation]] and was ubiquitous in early APLs; many newer APLs which adhere to [[leading axis theory]] reject the use of axis specification in favor of the [[Rank operator]] because it is a fully general operator while the behavior of functions with axis must be defined for each function separately.

== Functions ~~with Axis ~~===== Monadic functions ===

The following [[Monadic function|monads]] may allow an axis:

* [[Mix]] accepts a list of axes to specify where the axes of argument elements will be placed in the result.

* [[Split]] accepts a single axis, and encloses each [[vector]] along that axis.

* [[Reverse]] reverses along the specified axis.

=== Dyadic functions ===

The following [[Dyadic function|dyads]] may allow one:

* [[Scalar dyadics]] accept a list of axes to override [[conformability]] rules: it specifies , for each axis in the lower-rank (or left, in case of a tie) argument, which axis in the other argument it is paired with.

* [[Partition]] and [[Partitioned Enclose]] have complicated and different behavior.

{{APL programming language}}