Nothing
set_combn <-
function(x, m)
{
if (m == 0)
set()
else
do.call(set, apply(combn(.as.list(x), m), 2L, as.set))
}
gset_combn <-
function(x, m)
{
if (m == 0L)
gset()
else {
support <- apply(combn(.as.list(x), m), 2L, as.set)
memberships <- unlist(apply(combn(.get_memberships(x), m), 2L, list),
recursive = FALSE)
do.call(set, Map(gset, support, memberships))
}
}
cset_combn <-
function(x, m)
{
## get matchfun and orderfun
matchfun <- .matchfun(x)
orderfun <- .orderfun(x)
if (is.integer(orderfun))
orderfun <- NULL
if (m == 0L)
gset()
else {
support <- apply(combn(.as.list(x), m), 2L, as.set)
memberships <- unlist(apply(combn(.get_memberships(x), m), 2L, list),
recursive = FALSE)
do.call(set,
lapply(Map(gset, support, memberships),
cset, orderfun, matchfun)
)
}
}
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