cherry.df: Girth, Height and Volume for Black Cherry Trees

In R330: An R package for Stats 330

Description

This data set provides measurements of the girth, height and volume of timber in 31 felled black cherry trees. Note that girth is the diameter of the tree (in inches) measured at 4 ft 6 in above the ground.

Usage

data(cherry.df)

Format

A data frame with 31 observations on the following 3 variables:

diameter

Tree diameter in inches

height

Height in ft

volume

Volume of timber in cubic ft

Source

Ryan, T. A., Joiner, B. L. and Ryan, B. F. (1976) The Minitab Student Handbook. Duxbury Press.

References

Atkinson, A. C. (1985) Plots, Transformations and Regression. Oxford University Press.

Examples

data(cherry.df)
cherry.lm =lm(volume~diameter+height,data=cherry.df) 
new.df = data.frame(diameter=c(11,12),
             height=c(85,90))
predict(cherry.lm,new.df)

R330 documentation built on May 2, 2019, 2:12 p.m.