biogeo (version 1.0)

outliers: Detects outliers using values extracted from an environmental variable

Description

Calculates the outliers using the reverse jackknife procedure (see rjack) and boxplot statistics (using boxplot.stats). If the value lies 1.5 times beyond the length of the box in the boxplot then it is considered to be an outlier. This function is used by errorcheck.

Usage

outliers(rid, species, dups, ev)

Arguments

rid

row identifier created in errorcheck

species

column of species names

dups

a column of zeros and ones, where ones indicate duplicates

ev

the values of the environmental variable

Value

See Also

errorcheck, boxplot.stats, rjack

Examples

rid<-1:20
species<-rep("Species A",20)
dups=rep(0,20)
ev<-c(rnorm(19,mean=20,sd=1),40)
a<-outliers(rid, species, dups, ev)