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- Static Method:
`out`=**trees***()* -
Diameter, Height and Volume for Black Cherry Trees

#### Description

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

#### Format

`Girth`

Tree diameter (rather than girth, actually) in inches.

`Height`

Height in ft.

`Volume`

Volume of timber in cubic feet.

#### 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: Oxford University Press.

#### Examples

t = octave.dataset.trees; figure octave.examples.plot_pairs (t); figure loglog (t.Girth, t.Volume) xlabel ("Girth") ylabel ("Volume") # TODO: Transform to log space for the coplot # TODO: Linear model