R: Pairwise t tests

pairwise.t.test {stats}

R Documentation

Pairwise t tests

Description

Calculate pairwise comparisons between group levels with corrections for multiple testing

Usage

pairwise.t.test(x, g, p.adjust.method = p.adjust.methods,
                pool.sd = TRUE, ...)

Arguments

x

Response vector

g

Grouping vector or factor

p.adjust.method

Method for adjusting p values (see p.adjust)

pool.sd

Switch to allow/disallow the use of a pooled SD

...

Additional arguments to pass to t.test

Value

Object of class "pairwise.htest"

Examples

attach(airquality)
Month <- factor(Month, labels = month.abb[5:9])
pairwise.t.test(Ozone, Month)
pairwise.t.test(Ozone, Month, p.adj = "bonf")
pairwise.t.test(Ozone, Month, pool.sd = FALSE)
detach()