ssym (version 1.5.2)

Erabbits: Age and Eye Lens Weight for Rabbits in Australia

Description

In this data set, the dry weight of the eye lens was measured for 71 free-living wild rabbits of known age. Eye lens weight tends to vary much less with environmental conditions than does total body weight, and therefore may be a much better indicator of age.

Usage

data(Erabbits)

References

Dudzinski, M.L. and Mykytowycz, R. (1961) The eye lens as an indicator of age in the wild rabbit in Australia. CSIRO Wildlife Research, 6: 156-159. Ratkowsky, D. A. (1983). Nonlinear Regression Modelling. Marcel Dekker, New York. Wei, B. C. (1998). Exponential Family Nonlinear Models. Springer, Singapore.

Examples

data("Erabbits", package="ssym")
plot(Erabbits$age, Erabbits$wlens, xlim=range(Erabbits$age), ylim=range(Erabbits$wlens),
     type="p", cex=0.3, lwd=3, ylab="Dry weight of eye lens (in milligrams)",
	 xlab="Age of the animal (in days)")