Leading axis theory: Difference between revisions

'''Leading axis theory''', or the '''leading axis model''', is an approach to array language design and use that emphasizes working with arrays by manipulating their [[cell]]s and mapping functions over leading [[Axis|axes]] implicitly using [[function rank]] or explicitly using the [[Rank operator]]. It was initially developed in [[SHARP APL]] in the early 1980s and is now a major feature of [[J]] and [[Dyalog APL]], as well as languages influenced by these. The name "leading axis" comes from the [[frame]], which consists of leading axes of an array, the related concept of [[leading axis agreement]], which extends [[scalar]] [[conformability]], and the emphasis on first axis forms of functions while deprecating or discarding other [[function axis|choices of axis]].