Oats {nlme} | R Documentation |

## Split-plot Experiment on Varieties of Oats

### Description

The `Oats`

data frame has 72 rows and 4 columns.

### Format

This data frame contains the following columns:

- Block
- an ordered factor with levels
`VI`

< `V`

< `III`

< `IV`

< `II`

< `I`

- Variety
- a factor with levels
`Golden Rain`

`Marvellous`

`Victory`

- nitro
- a numeric vector
- yield
- a numeric vector

### Details

These data have been introduced by Yates (1935) as an
example of a split-plot design. The treatment structure used in the
experiment was a 3$times$4 full factorial, with three varieties of
oats and four concentrations of nitrogen. The experimental units were
arranged into six blocks, each with three whole-plots subdivided into
four subplots. The varieties of oats were assigned randomly to the
whole-plots and the concentrations of nitrogen to the subplots. All
four concentrations of nitrogen were used on each whole-plot.

### Source

Pinheiro, J. C. and Bates, D. M. (2000), *Mixed-Effects Models in S
and S-PLUS*, Springer, New York. (Appendix A.15)

Venables, W. N. and Ripley, B. D. (1999) *Modern Applied
Statistics with S-PLUS (3rd ed)*, Springer, New York.

[Package

*nlme* version 3.1-66

Index]