Var - Analog Devices VISUALDSP++ 3.5 Manual

DSP Run-Time Library Reference

var

variance
Synopsis
#include <stats.h>
float varf(a,n)
const float a[];
int n;
fract16 var_fr16(a, n)
const fract16 a[];
int n;
Description
This function computes the variance of the input elements contained
within input vector
Algorithm
n − 1
∑
2
−
n * a
i
=
i 0
=
c
−
n n (
Domain
38
-3.4 x 10 to +3.4 x 10
-1.0 to +1.0
4-108
and returns the result.
a
n − 1
∑
2
( a )
i
=
i 0
1 )
38
VisualDSP++ 3.5 C/C++ Compiler and Library Manual
/* Pointer to input vector a
/* Number of input samples
/* Pointer to input vector a
/* Number of input samples
for
varf( )
for
var_fr16( )
for ADSP-219x DSPs
*/
*/
*/
*/