Update packages

elpa/ess-20180524.1000/etc/chol2inv-ex.Rd

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+\title{chol2inv}
+\name{chol2inv-methods}
+\description{
+  Invert a symmetric, positive definite square matrix from its Choleski
+  decomposition.  Equivalently, compute \eqn{(X'X)^{-1}}{(X'X)^(-1)}
+  from the (\eqn{R} part) of the QR decomposition of \eqn{X}.
+}
+\seealso{
+  \code{\link[base]{chol2inv}} (from the \pkg{base} package),
+  \code{\link{solve}}.
+}
+%%-- In Rd preview (after C-c C-p), "se" ([s]kip to [e]xamples):
+%%-- "l" works at the 1st line, but does not go further from the 2nd
+\examples{
+(M <- cbind(1, 1:3, c(1,3,7)))
+(cM <- chol(M)) # a "Cholesky" object...
+chol2inv(cM) \%*\% M # the identity
+stopifnot(all(chol2inv(cM) \%*\% M - Diagonal(nrow(M))) < 1e-10)
+}
+\keyword{algebra}