KDATA_PMFVAR(3)

NAME
kdata_pmfvar - compute probability mass function variance of data

LIBRARY
libkplot

SYNOPSIS
#include <cairo.h>
#include <kplot.h>
double
kdata_pmfmean(const struct kdata *data);

DESCRIPTION
The kdata_pmfmean function compute the variance of its data as if it were a probability mass function.

RETURN VALUES
If the data source has zero entries or the sum of the y values is 0.0, kdata_pmfmean returns 0.0. Otherwise, it returns the variance.

SEE ALSO
kdata_pmfmean(3), kdata_pmfstddev(3), kplot(3)