variance: Variance

In HervePerdry/M1SP: Examples for the Master 1 de Santé Publique

Variance

Description

Variance

Usage

variance(x, sample = FALSE, na.rm = FALSE)

Arguments

x	numerical vector.
sample	logical. Compute sample variance or apply correction?
na.rm	logical. Should missing values be removed?

Value

The variance, with ou whithout sample correction.

Examples

# variance of the height in EUR2170 data
variance(EUR2170$height, sample = TRUE)
# adults only
he <- subset(EUR2170, age > 20, "height")
variance(he, sample = TRUE)
# males and females separately
heM <- subset(EUR2170, age > 20 & sex == "M", "height")
heF <- subset(EUR2170, age > 20 & sex == "F", "height")
variance(heM, sample = TRUE)
variance(heF, sample = TRUE)

HervePerdry/M1SP documentation built on Dec. 16, 2024, 8:19 p.m.