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This function takes a matrix that is in data frame format and transforms it into a matrix. Other packages that allows you to obtain an additive relationship matrix from a pedigree is the `pedigreemm` package.
dfToMatrix(x, row="Row",column="Column",
value="Ainverse", returnInverse=FALSE,
bend=1e-6)
pedigree transformed in a relationship matrix.
inverse of the pedigree transformed in a relationship matrix.
ginv element, output from the Ainverse function.
name of the column in x that indicates the row in the original relationship matrix.
name of the column in x that indicates the column in the original relationship matrix.
name of the column in x that indicates the value for a given row and column in the original relationship matrix.
a TRUE/FALSE value indicating if the inverse of the x matrix should be computed once the data frame x is converted into a matrix.
a numeric value to add to the diagonal matrix in case matrix is singular for inversion.
Giovanny Covarrubias-Pazaran
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
library(Matrix)
m <- matrix(1:9,3,3)
m <- tcrossprod(m)
mdf <- as.data.frame(as.table(m))
mdf
dfToMatrix(mdf, row = "Var1", column = "Var2",
value = "Freq",returnInverse=FALSE )
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