Flury (version 0.1-3)

strider: Skeletal dimensions of water striders

Description

Water striders live on the surface of lakes and ponds. These insects grow in six distinct stages called instars; at each transition they shed their skin / skeleton. Data has been collected on N=88 female water striders from species Limnoporus canaliculatus. Measurements are reported for the first three instars.

Usage

data(strider)

Format

A data frame with 88 observations on the following 6 variables.

Femur1

Average length of femur, instar 1

Tibia1

Average length of tibia, instar 1

Femur2

Average length of femur, instar 2

Tibia2

Average length of tibia, instar 2

Femur3

Average length of femur, instar 3

Tibia3

Average length of tibia, instar 3

Source

Data courtesy of Dr. C.P. Klingenberg, University of Alberta

Details

The actual analysis used the variables $x_j star = 100 log x_j$, for the j = 1 to 6 variables reported.

References

Flury, B.D. (1997) A First Course in Multivariate Statistics, New York: Springer

Examples

data(strider)
## Not run: 
# X <- 100 * log(strider)
# cov(X) ## etc.## End(Not run)