Bamboo progeny trial — jayaraman.bamboo • agridat

Bamboo progeny trial in 2 locations, 3 blocks

data("jayaraman.bamboo")

Format

A data frame with 216 observations on the following 5 variables.

loc: location factor
block: block factor
tree: tree factor
family: family factor
height: height, cm

Details

Data from a replicated trial of bamboo at two locations in Kerala, India. Each location had 3 blocks. In each block were 6 families, with 6 trees in each family.

Source

K. Jayaraman (1999). "A Statistical Manual For Forestry Research". Forestry Research Support Programme for Asia and the Pacific. Page 170.

References

None

Examples

# \dontrun{
  library(agridat)
  data(jayaraman.bamboo)
#> Warning: data set 'jayaraman.bamboo' not found
  dat <- jayaraman.bamboo
#> Error in eval(expr, envir, enclos): object 'jayaraman.bamboo' not found

  # very surprising differences between locations
  libs(lattice)
  bwplot(height ~ family|loc, d2, main="jayaraman.bamboo")
#> Error in eval(substitute(groups), data, environment(formula)): object 'd2' not found
  # match Jayarman's anova table 6.3, page 173
  # m1 <- aov(height ~ loc+loc:block + family + family:loc + family:loc:block, data=d2)
  # anova(m1)

  # more modern approach with mixed model, match variance components needed
  # for equation 6.9, heritability of the half-sib averages as
  m2 <- lme4::lmer(height ~ 1 + (1|loc/block) + (1|family/loc/block), data=d2)
#> Error: 'data' not found, and some variables missing from formula environment
  lucid::vc(m2)
#> Error in lucid::vc(m2): object 'm2' not found
# }