Next: , Previous: , Up: octave.dataset   [Contents]


8.2.45.38 octave.dataset.Loblolly

Static Method: out = Loblolly ()

Growth of Loblolly pine trees

Description

Records of the growth of Loblolly pine trees.

Format

height

Tree height (ft).

age

Tree age (years).

Seed

Seed source for the tree. Ordering is according to increasing maximum height.

Source

Kung, F. H. (1986). Fitting logistic growth curve with predetermined carrying capacity. Proceedings of the Statistical Computing Section, American Statistical Association, 340–343.

Pinheiro, J. C. and Bates, D. M. (2000). Mixed-effects Models in S and S-PLUS. New York: Springer.

Examples

t = octave.dataset.Loblolly;

t2 = t(t.Seed == "329",:);
scatter (t2.age, t2.height)
xlabel ("Tree age (yr)");
ylabel ("Tree height (ft)");
title ("Loblolly data and fitted curve (Seed 329 only)")

# TODO: Compute and plot fitted curve