solve.reStruct {nlme} | R Documentation |
Solve
is applied to each pdMat
component of a
,
which results in inverting the positive-definite matrices they
represent.
solve(a, b, tol)
a |
an object inheriting from class reStruct ,
representing a random effects structure and consisting of a list of
pdMat objects. |
b |
this argument is only included for consistency with the generic function and is not used in this method function. |
tol |
an optional numeric value for the tolerance used in the
numerical algorithm. Defaults to 1e-7 . |
an reStruct
object similar to a
, but with the
pdMat
components representing the inverses of the
matrices represented by the components of a
.
Jose Pinheiro and Douglas Bates
rs1 <- reStruct(list(A = pdSymm(diag(1:3), form = ~Score), B = pdDiag(2 * diag(4), form = ~Educ))) solve(rs1)