NAME

       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);

                                             05/01/95                                PGAStddev(5)