jayaraman.bamboo: Bamboo progeny trial

In agridat: Agricultural Datasets

Bamboo progeny trial

Description

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

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

## Not run: 
  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)

## End(Not run)

agridat documentation built on Oct. 27, 2024, 5:07 p.m.