Programmer Guide/SPU Reference/LENGTH: Difference between revisions

Latest revision as of 08:31, 13 October 2015

Number of elements in A

If A is a numerical data element (number, vector or matrix), the dimensions of A are stored in the outputs.

Out	Description
`Y`	number of rows; 1 if `A` is a number and >1 otherwise
`NROW`	number of rows; 1 if `A` is a number and >1 otherwise
`NCOL`	number of columns; 1 if `A` is a number or vector and >1 otherwise
`N`	number of elements = number of rows * number of columns

Note: The output values are assigned during the SPU initialization and cannot be changed during execution.

@@ Line 1: / Line 1: @@
 {{DISPLAYTITLE:{{SUBPAGENAME}}}}
-====LENGTH - vector length====
+{{SPAtomTemplate}}
+Number of elements in <var>A</var>
-Compute number of elements of input <var>A</var>.
+==<code>[SPU LENGTH <var>A</var> OUT <var>Y NROW NCOL N</var>]</code>==
+If <var>A</var> is a numerical data element (number, vector or matrix), the dimensions of <var>A</var> are stored in the outputs.
-{|
+{|class="einrahmen"
+!Out !!Description
+|-
+|<var>Y</var> || number of rows; 1 if <var>A</var> is a number and &gt;1 otherwise
 |-
-|if A is a number:
+|<var>NROW</var> || number of rows; 1 if <var>A</var> is a number and &gt;1 otherwise
-|Y = 1
 |-
-|if A is a vector:
+|<var>NCOL</var> || number of columns; 1 if <var>A</var> is a number or vector and &gt;1 otherwise
-|Y = number of elements of <var>A</var>
-|}
-=====Usage:=====
-<code>LENGTH <var>A</var></code>
-=====Inputs:=====
-{|
 |-
-|A
+|<var>N</var> || number of elements = number of rows * number of columns
-|number or vector
 |}
-=====Outputs:=====
+Note: The output values are assigned during the SPU initialization and cannot be changed during execution.
+;See also:
-{|
+<[[../#Signal Processing Atoms|SP-atoms]]>
-|-
+<!-- AN, 2.5.2011 -->
-|<var>Y</var>
-|number of elements of A (number)
-|}