The spider data set

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Description

Data set on abundances of spiders and environmental predictors. This is a subset of a larger data comprising 12 species and 6 environmental predictors. All variables are rated on a 0-9 scale.

Usage

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Format

A data frame with 28 observations on the following 9 variables.

Pard.lugu

a numeric vector

Pard.pull

a numeric vector

Troc.terr

a numeric vector

Pard.mont

a numeric vector

Alop.acce

a numeric vector

Alop.fabr

a numeric vector

Water

a numeric vector

Herbs

a numeric vector

Site

a factor with 28 levels

Source

package mvpart

References

De'ath G. (2002) Multivariate regression trees: A new technique for modeling species-environment relationships. Ecology, 2002, 83:1105–1117.

Examples

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data(spider6)
summary(spider6)
fit0 <- mdm(y2p(spider6[,1:6])~1,data=spider6)
fit1 <- mdm(y2p(spider6[,1:6])~Water+Herbs,data=spider6)
fit2 <- mdm(y2p(spider6[,1:6])~Site,data=spider6,alpha=TRUE)
anova(fit0,fit1,fit2)