fixm: fixed indication matrix

In sommer: Solving Mixed Model Equations in R

fixed indication matrix

Description

fixm creates a square matrix with 3's in the diagnals and off-diagonals to quickly specify a fixed constraint in the Gtc argument of the vsm function.

Usage

  fixm(x, reps=NULL)

Arguments

x	integer specifying the number of traits to be fitted for a given random effect.
reps	integer specifying the number of times the matrix should be repeated in a list format to provide easily the constraints in complex models that use the ds(), us() or cs() structures.

Value

$res

a matrix or a list of matrices with the constraints to be provided in the Gtc argument of the vsm function.

Author(s)

Giovanny Covarrubias-Pazaran

References

Covarrubias-Pazaran G (2016) Genome assisted prediction of quantitative traits using the R package sommer. PLoS ONE 11(6): doi:10.1371/journal.pone.0156744

Examples

fixm(4)
fixm(4,2)

sommer documentation built on June 8, 2025, 11:11 a.m.