gomez.groupsplit: Group balanced split-plot design in rice
In agridat: Agricultural Datasets

gomez.groupsplit

R Documentation

Group balanced split-plot design in rice

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.

Used with permission of Kwanchai Gomez.

Source

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

Examples


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

# Gomez figure 3.10.  Obvious fert and group effects
libs(desplot)
desplot(dat, group ~ col*row,
        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 Oct. 27, 2024, 5:07 p.m.