Unlistable Lists
A (nested) list with atomic objects in all final nodes of the list-tree is unlistable - checked with is.unlistable.
is.unlistable(l, DF.as.list = FALSE)
l |
a list. |
DF.as.list |
logical. |
is.unlistable with DF.as.list = TRUE is defined as all(rapply(l, is.atomic)), whereas DF.as.list = FALSE yields checking using all(unlist(rapply2d(l, function(x) is.atomic(x) || is.list(x)), use.names = FALSE)), assuming that data frames are lists composed of atomic elements. If l contains data frames, the latter can be a lot faster than applying is.atomic to every data frame column.
logical(1) - TRUE or FALSE.
l <- list(1, 2, list(3, 4, "b", FALSE)) is.unlistable(l) l <- list(1, 2, list(3, 4, "b", FALSE, e ~ b)) is.unlistable(l)
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