lme4breeding (version 1.0.80)

DT_yatesoats: Yield of oats in a split-block experiment

Description

The yield of oats from a split-plot field trial using three varieties and four levels of manurial treatment. The experiment was laid out in 6 blocks of 3 main plots, each split into 4 sub-plots. The varieties were applied to the main plots and the manurial (nitrogen) treatments to the sub-plots.

Format

block

block factor with 6 levels

nitro

nitrogen treatment in hundredweight per acre

Variety

genotype factor, 3 levels

yield

yield in 1/4 lbs per sub-plot, each 1/80 acre.

row

row location

column

column location

References

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.

Examples

data(DT_yatesoats)
DT <- DT_yatesoats
head(DT)
m3 <- lmebreed(Y ~ V + N + V:N +
             (1|B) + (1|B:MP),
             # how to control n iterations
             # control = lmerControl( 
             #  optCtrl = list(maxfun = 100, maxeval = 100)
             #   ),
           data = DT)
vc <- VarCorr(m3); print(vc,comp=c("Variance"))
sigma(m3)^2 # error variance