Wheat.dat {asreml3Plus}R Documentation

Data for an experiment to investigate 25 varieties of wheat

Description

The data appears in Gilmour et al. [1995] and is from a field experiment designed to compare the performance of 25 varieties of wheat. An analysis of it using asreml is presented by Butler et al. (2010, Sectoion 8.6), although they suggest that it is a barley experiment. It is used in asreml3Plus-package as an executable example of the use of the asreml3Plus to analyse a data set.

The experiment was conducted at Slate Hall Farm, UK, in 1976 and was designed as a balanced lattice square with 6 replicates laid out in a 10 x 15 rectangular grid. The columns in the data frame are: Rep, Row, Column, WithinColPairs, Variety, yield. The response variable is the grain yield.

Usage

data(Wheat.dat)

Format

A data.frame containing 150 observations of 6 variables.

Source

Butler, D. G., et al. (2010). Analysis of Mixed Models for S language environments: ASReml-R reference manual. Brisbane, DPI Publications.

Gilmour, A. R., et al. (1995) Average Information REML: An efficient algorithm for variance parameter estimation in linear mixed models. Biometrics, 51, 1440-1450.


[Package asreml3Plus version 2.0-14 Index]