Bamboo progeny trial in India

Bamboo progeny trial in 2 locations, 3 blocks

Usage

data("jayaraman.bamboo")

Format

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

loc

location factor

block

block factor

family

family factor

tree

tree 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.

Note: The data in jayaraman.bamboo.uncorrected is the same as jayaraman.bamboo except that the former has not been corrected for a data entry error in the tree variable. Thanks to Roger Stern for pointing out the error. The 'uncorrected' data is included for illustration purposes only, and should not be used for analysis.

Source

K. Jayaraman (1999). "A Statistical Manual For Forestry Research". Forestry Research Support Programme for Asia and the Pacific. Section 6.1, Page 170. https://openknowledge.fao.org/handle/20.500.14283/x6831e

References

None

Examples

if (FALSE) { # \dontrun{
  library(agridat)
  data(jayaraman.bamboo)
  dat <- jayaraman.bamboo

  # very surprising differences between locations
  libs(lattice)
  bwplot(height ~ family|loc, dat, main="jayaraman.bamboo")
  # match Jayarman's anova table 6.3, page 173
  # m1 <- aov(height ~ loc+loc:block + family + family:loc +
  #  family:loc:block, data=dat)
  # 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=dat)
  lucid::vc(m2)
} # }