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8.2.45.46 octave.dataset.npk ¶

Static Method: out = npk () ¶

Classical N, P, K Factorial Experiment

Description ¶

A classical N, P, K (nitrogen, phosphate, potassium) factorial experiment on the growth of peas conducted on 6 blocks. Each half of a fractional factorial design confounding the NPK interaction was used on 3 of the plots.

Format ¶

block

Which block (1 to 6).

N

Indicator (0/1) for the application of nitrogen.

P

Indicator (0/1) for the application of phosphate.

K

Indicator (0/1) for the application of potassium.

yield

Yield of peas, in pounds/plot. Plots were 1/70 acre.

Source ¶

Imperial College, London, M.Sc. exercise sheet.

References ¶

Venables, W. N. and Ripley, B. D. (2002). Modern Applied Statistics with S. Fourth edition. New York: Springer.

Examples ¶

t = octave.dataset.npk;

# TODO: Port aov() and LM to Octave