Rank: Difference between revisions
Jump to navigation
Jump to search
no edit summary
Miraheze>Marshall (Created page with "''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 oper...") |
Miraheze>Adám Brudzewsky No edit summary |
||
| 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]].'' | ||
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 <code>A</code> is <code>⍴⍴A</code>. Because this expression results in a one-element [[vector]] rather than a [[scalar]], it is idiomatic in languages with a [[Tally]] function to write <code>≢⍴A</code> instead. | 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 <code>A</code> is <code>⍴⍴A</code>. Because this expression results in a one-element [[vector]] rather than a [[scalar]], it is idiomatic in languages with a [[Tally]] function to write <code>≢⍴A</code> instead. | ||