PGAStddev: Calculates the standard deviation of an array of elements

INPUT PARAMETERS

ctx: - context variable
a: - array to take the standard deviation of
n: - number of elements in array a
mean: - the mean of the elements in array a

OUTPUT PARAMETERS

none

SYNOPSIS

#include "pgapack.h"
double  PGAStddev(ctx, a, n, mean)
PGAContext *ctx
double *a
int n
double mean

LOCATION

utility.c

EXAMPLE

Example:
PGAContext *ctx;
double a[100], mean, sigma;
:
mean  = PGAMean(ctx, a, 100);
sigma = PGAStddev(ctx, a, 100, mean);