R/0aaa.R

In pimentel/cluster: Cluster Analysis Extended Rousseeuw et al.

## Ensure consistent "diss.." class --- make "namespace-private-global !
dissiCl <- c("dissimilarity", "dist")

## Not exported, and only used because CRAN checks must be faster
doExtras <- function() {
    interactive() || nzchar(Sys.getenv("R_CLUSTER_CHECK_EXTRA")) ||
        identical("true", unname(Sys.getenv("R_PKG_CHECKING_doExtras")))
}