sort.levels {mining}R Documentation

Sort levels of a factor

Description

The levels of a factor are sorted according to a summary statistic.

Usage

sort.levels(f,x,fun=median)

Arguments

f a factor
x a vector, same length as f
fun function to use to summarize groups of x

Value

A copy of f with re-ordered levels.

Author(s)

Tom Minka

Examples

data(OrchardSprays)
sort.levels(OrchardSprays$treatment, OrchardSprays$decrease)
sort.levels(OrchardSprays$treatment, OrchardSprays$decrease, fun=mean)
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