Multi-environment trial of winter wheat at 12 sites in 4 years.

Format

A data frame with 48 observations on the following 3 variables.

loc

location, 12 levels

year

year, numeric

yield

yield (kg)

Details

Krzanowski uses this briefly for multi-dimensional scaling.

Source

R. Lyons (1980). A review of multidimensional scaling. Unpublished M.Sc. dissertation, University of Reading.

References

Krzanowski, W.J. (1988) Principles of multivariate analysis. Oxford University Press.

Examples

if (FALSE) {

library(agridat)
data(lyons.wheat)
dat <- lyons.wheat

libs(lattice)
xyplot(yield~factor(year), dat, group=loc,
  main="lyons.wheat",
  auto.key=list(columns=4), type=c('p','l'))
}