agridat (version 1.16)

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

Description

Yield 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.

References

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

Examples

# NOT RUN {
data(lyons.wheat)
dat <- lyons.wheat

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