Fast variance

Single-pass two-step C++ kernel with optional ddof correction.

Usage

morie_var(x, ddof = 1)

Arguments

x

numeric vector

ddof

integer; default 1 (sample variance)

Value

A numeric scalar: the variance of x.

Examples

abs(rmorie:::morie_var(c(1, 2, 3, 4, 5), ddof = 1) - 2.5) < 1e-9
#> [1] TRUE