4,493
edits
Rank: Difference between revisions
Jump to navigation
Jump to search
m
no edit summary
Miraheze>Adám Brudzewsky No edit summary |
mNo edit summary |
||
| (11 intermediate revisions by 5 users not shown) | |||
| Line 1: | Line 1: | ||
:''This page is about array rank, a number associated with every array. For numbers associated with a function specifying its argument rank, see [[function rank]]. For the operator that applies a function at a given rank, see [[Rank operator]].'' | :''This page is about array rank, a number associated with every array. For numbers associated with a function specifying its argument rank, see [[function rank]]. For the operator that applies a function at a given rank, see [[Rank (operator)]].'' | ||
In the APL [[array model]], the '''rank''' of an [[array]] is the number of dimensions or [[Axis|axes]] in its structure, or the length of its [[shape]]. The traditional expression for the rank of an array <source lang=apl inline>A</source> is <source lang=apl inline>⍴⍴A</source>. Because this expression results in a one-element [[vector]] rather than a [[scalar]], it is idiomatic in languages with a [[Tally]] function to write <source lang=apl inline>≢⍴A</source> instead. | |||
Arrays are given names based on their rank: | Arrays are given names based on their rank: | ||
{| | {|class=wikitable | ||
! Rank !! Name | ! Rank !! Name | ||
|- | |- | ||
| Line 18: | Line 18: | ||
== External Links == | == External Links == | ||
[ | * [[wikipedia:Rank (computer programming)|Rank (computer programming)]] | ||
{{APL features}}[[Category:Array characteristics]] | |||