SASmixed (version 1.0-4)

Multilocation: A multilocation trial

Description

The Multilocation data frame has 108 rows and 7 columns.

Format

This data frame contains the following columns:

obs

a numeric vector

Location

an ordered factor with levels B < D < E < I < G < A < C < F < H

Block

a factor with levels 1 to 3

Trt

a factor with levels 1 to 4

Adj

a numeric vector

Fe

a numeric vector

Grp

an ordered factor with levels B/1 < B/2 < B/3 < D/1 < D/2 < D/3 < E/1 < E/2 < E/3 < I/1 < I/2 < I/3 < G/1 < G/2 < G/3 < A/1 < A/2 < A/3 < C/1 < C/2 < C/3 < F/1 < F/2 < F/3 < H/1 < H/2 < H/3

Source

Littel, R. C., Milliken, G. A., Stroup, W. W., and Wolfinger, R. D. (1996), SAS System for Mixed Models, SAS Institute (Data Set 2.8.1).

Examples

str(Multilocation)
if (require("lme4", quietly = TRUE, character = TRUE)) {
  options(contrasts = c(unordered = "contr.SAS", ordered = "contr.poly"))
  ### Create a Block %in% Location factor
  Multilocation$Grp <- with(Multilocation, Block:Location)
  print(fm1Mult <- lmer(Adj ~ Location * Trt + (1|Grp), Multilocation))
  print(anova(fm1Mult))
  print(fm2Mult <- lmer(Adj ~ Location + Trt + (1|Grp), Multilocation), corr=FALSE)
  print(fm3Mult <- lmer(Adj ~ Location + (1|Grp), Multilocation), corr=FALSE)
  print(fm4Mult <- lmer(Adj ~ Trt + (1|Grp), Multilocation))
  print(fm5Mult <- lmer(Adj ~ 1 + (1|Grp), Multilocation))
  print(anova(fm2Mult))
  print(anova(fm1Mult, fm2Mult, fm3Mult, fm4Mult, fm5Mult))
  ### Treating the location as a random effect
  print(fm1MultR <- lmer(Adj ~ Trt + (1|Location/Trt) + (1|Grp), Multilocation))
  print(anova(fm1MultR))
  fm2MultR <- lmer(Adj ~ Trt + (Trt - 1|Location) + (1|Block), Multilocation)
  ## Warning (not error ?!): Convergence failure in 10000 iter %% __FIXME__
  print(fm2MultR)# does not mention previous conv.failure %% FIXME ??
  print(anova(fm1MultR, fm2MultR))
 ## Not run: 
#   confint(fm1MultR)
#  ## End(Not run)
}