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This method function extracts square-root factors of the positive-definite matrices corresponding to the pdMat elements of object.
pdMat
object
# S3 method for reStruct pdFactor(object)
a vector with square-root factors of the positive-definite matrices corresponding to the elements of object stacked column-wise.
an object inheriting from class "reStruct", representing a random effects structure and consisting of a list of pdMat objects.
"reStruct"
José Pinheiro and Douglas Bates bates@stat.wisc.edu
Pinheiro, J.C., and Bates, D.M. (2000) "Mixed-Effects Models in S and S-PLUS", Springer.
pdFactor, pdMatrix.reStruct, pdFactor.pdMat
pdFactor
pdMatrix.reStruct
pdFactor.pdMat
rs1 <- reStruct(pdSymm(diag(3), ~age+Sex, data = Orthodont)) pdFactor(rs1)
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