var, sd, cor functions that have n as denominator

Question

var, sd, cor functions in {stats} use n-1 as a denominator (where n the number of observations). Out of curiosity, are there equivalent function that use n as a denominator?

Thorncombe

maybe in some package somewhere, but I think people just generally multiply by the appropriate correction factor, or write their own utility function that does it .... r.789695.n4.nabble.com/… – Graybeard

Usually just multiply by (n-1)/n if I'm working with pop data. I think the answer might actually be just plain "no" here. – Exterritorial

Answer 1

Try this:

library(RH2) # needs Java
library(sqldf)

n <- length(BOD$demand)

sd(BOD$demand)
sqrt((n-1)/n) * sd(BOD$demand)
sqldf("select stddev_samp(demand) as samp, stddev_pop(demand) as pop from BOD")

var(BOD$demand)
(n-1)/n * var(BOD$demand)
sqldf("select var_samp(demand) as samp, var_pop(demand) as pop from BOD")    

Rivulet