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Miraheze>Adám Brudzewsky m (Text replacement - "<code>" to "<source lang=apl inline>") |
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:''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]].'' | ||
The rank of an array is the number of dimensions in its structure, or, in APL terms, the length of its [[shape]]. The traditional expression for the rank of an array <source lang=apl inline>A</ | The rank of an array is the number of dimensions in its structure, or, in APL terms, 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: | ||