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

- 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