candisc (version 0.5-16)

Wolves: Wolf skulls

Description

Skull morphometric data on Rocky Mountain and Arctic wolves (Canis Lupus L.) taken from Morrison (1990), originally from Jolicoeur (1959).

Usage

data(Wolves)

source

Morrison, D. F. Multivariate Statistical Methods, (3rd ed.), 1990. New York: McGraw-Hill, p. 288-289.

Details

All variables are expressed in millimeters. The goal was to determine how geographic and sex differences among the wolf populations are determined by these skull measurements. For MANOVA or (canonical) discriminant analysis, the factors group or location and sex provide alternative parameterizations.

References

Jolicoeur, P. ``Multivariate geographical variation in the wolf Canis lupis L.'', Evolution, XIII, 283--299.

Examples

data(Wolves)

# using group
wolf.mod <-lm(cbind(x1,x2,x3,x4,x5,x6,x7,x8,x9)~group, data=Wolves)
Anova(wolf.mod)

(wolf.can <-candisc(wolf.mod))
plot(wolf.can)
heplot(wolf.can)

# using location, sex
wolf.mod2 <-lm(cbind(x1,x2,x3,x4,x5,x6,x7,x8,x9)~location*sex, data=Wolves)
Anova(wolf.mod2)

(wolf.can2 <-candiscList(wolf.mod2))
plot(wolf.can2)