rae {SOP}

Defining random effects in SOP formula

Description

Auxiliary function used to define random effects terms in a sop model formula.

Usage

rae(x)

Arguments

x

the x-variable (factor) that defines the random effects term.

Details

The functions is designed to represent random effects in SOP formulae.

Value

The function is interpreted in the formula of a sop model and creates the right framework for fitting the random effect. List containing the following elements:

x

name of the covariate involved.

See Also

f, ad, sop

Examples

library(SOP)
require(SpATS)
## An example of use of SOP package for the analysis of field trials experiments.
## Taken from the SpATS package.
data(wheatdata)

# Create factor variable for row and columns
wheatdata$R <- as.factor(wheatdata$row)
wheatdata$C <- as.factor(wheatdata$col)

# package SOP
m0 <- sop(formula = yield ~ colcode + rowcode + 
  f(col, row, nseg = c(10, 10)) + 
  rae(geno) + rae(R) + rae(C), data = wheatdata)
summary(m0)
plot(m0, col = topo.colors(100))