DT_legendre: Simulated data for random regression

In lme4breeding: Breeding-Related Mixed-Effects Models

Simulated data for random regression

Description

A data frame with 4 columns; SUBJECT, X, Xf and Y to show how to use the Legendre polynomials in the lmebreed function using a numeric variable X and a response variable Y.

Usage

data("DT_legendre")

Format

The format is: chr "DT_legendre"

Source

This data was simulated for fruit breeding applications.

References

Giovanny Covarrubias-Pazaran (2024). lme4breeding: enabling genetic evaluation in the age of genomic data. To be submitted to Bioinformatics.

Douglas Bates, Martin Maechler, Ben Bolker, Steve Walker (2015). Fitting Linear Mixed-Effects Models Using lme4. Journal of Statistical Software, 67(1), 1-48.

See Also

The core function of the package lmebreed

Examples

data(DT_legendre)
DT <- DT_legendre
head(DT)



library(orthopolynom)
Z <- with(DT, smm(leg(X,1)) )
for(i in 1:ncol(Z)){DT[,colnames(Z)[i]] <- Z[,i]}
## diagonal random regression Y ~ Xf + (0+leg0+leg1|| SUBJECT)
## unstructured random regression Y ~ Xf + (0+leg0+leg1| SUBJECT)
mRR2b<-lmebreed(Y ~ Xf + (0+leg0+leg1| SUBJECT),
                , data=DT)
vc <- VarCorr(mRR2b); print(vc,comp=c("Variance"))
sigma(mRR2b)^2 # error variance

BLUP <- ranef(mRR2b, condVar=TRUE)
PEV <- lapply(BLUP, function(x){attr(x, which="postVar")}) # take sqrt() for SEs

lme4breeding documentation built on Nov. 5, 2025, 6:33 p.m.