Oats  R Documentation 
Splitplot 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
splitplot 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 wholeplots subdivided into
four subplots. The varieties of oats were assigned randomly to the
wholeplots and the concentrations of nitrogen to the subplots. All
four concentrations of nitrogen were used on each wholeplot.
Source
Pinheiro, J. C. and Bates, D. M. (2000), MixedEffects Models in S and SPLUS, Springer, New York. (Appendix A.15)
Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. (4th ed), Springer, New York.