lyons.wheat {agridat} | R Documentation

## 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.

### 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 Unpublished M.Sc.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

    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'))

[Package agridat version 1.16 Index]