Programmer Guide/SPU Reference/STAT: Difference between revisions

Latest revision as of 10:20, 6 May 2011

Mean and standard deviation of input A.

In	Out
`A_number`	$MY=A$ $SIGMA=0$
`A_vector`	$MY={\frac {1}{n}}\sum _{i=0}^{n-1}A[i]$ $SIGMA={\sqrt {{\frac {1}{n-1}}\sum _{i=0}^{n-1}(A[i]-MY)^{2}}}$

with: n = length of A_vector

@@ Line 1: / Line 1: @@
 {{DISPLAYTITLE:{{SUBPAGENAME}}}}
-====STAT - mean and std.deviation====
+Mean and standard deviation of input <var>A</var>.
+==<code>[SPU STAT <var>A</var> OUT <var>MY SIGMA</var>]</code>==
-=====Usage:=====
+{|class="einrahmen"
+!In !!Out
-<code>STAT <var>a</var></code>
-=====Inputs:=====
-{|
 |-
-|a
+|<var>A<sub>number</sub></var>
-|number or vector
+|<math>MY=A</math><BR><math>SIGMA=0</math>
-|}
-=====Outputs:=====
-{|
-|-
-|<var>my</var>
-|average of a (number)
 |-
-|sigma
+|<var>A<sub>vector</sub></var>
-|standard deviation of a (number)
+|<math>MY=\frac{1}{n}\sum_{i=0}^{n-1}A[i]</math><BR><math>SIGMA=\sqrt{\frac{1}{n-1}\sum_{i=0}^{n-1}(A[i]-MY)^2}</math>
 |}
+with: n = length of <var>A<sub>vector</sub></var>
-=====Function:=====
+;See also:
+<[[../#Signal Processing Atoms|SP-atoms]]>
-Compute average and standard deviation of input <var>a</var>.
+<!-- AN, 2.5.2011 -->
-If <var>a</var> is a number:
-[[File:1281.png]]
-If <var>a</var> is a vector with n elements:
-[[File:1282.png]]