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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