gomez.groupsplit: Group balanced split-plot design in rice

Description Format Details Source Examples

Description

Group balanced split-plot design in rice

Format

A data frame with 270 observations on the following 7 variables.

col

column

row

row

rep

replicate factor, 3 levels

fert

fertilizer factor, 2 levels

gen

genotype factor, 45 levels

group

grouping (genotype) factor, 3 levels

yield

yield of rice

Details

Genotype group S1 is less than 105 days growth duration, S2 is 105-115 days growth duration, S3 is more than 115 days.

Source

Gomez, K.A. and Gomez, A.A.. 1984, Statistical Procedures for Agricultural Research. Wiley-Interscience. Page 120.

Used with permission of Kwanchai Gomez.

Examples

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data(gomez.groupsplit)
dat <- gomez.groupsplit

# Gomez figure 3.10.  Obvious fert and group effects
if(require(desplot)){
  desplot(group ~ col*row, dat,
          out1=rep, col=fert, text=gen, # aspect unknown
          main="gomez.groupsplit")
}

# Gomez table 3.19 (not partitioned by group)
m1 <- aov(yield ~ fert*group + gen:group + fert:gen:group +
            Error(rep/fert/group), data=dat)
summary(m1)

agridat documentation built on May 2, 2019, 4:01 p.m.