最近在学习R的一个bigtabulate包，其中有一个函数
bigsplit(x, ccols, breaks = vector("list", length = length(ccols)),useNA = "no", splitcol = NA, splitret = "list")
按照函数的说明，当 The default behavior (splitcol=NA) returns a split of 1:nrow(x) as a list based on the specified conditional structure.如果不指定分割列，应该就是返回行索引，而事实上并没有
而是报错，资深的你是否遇到过？该如何解决？
dt <- data.frame(AA=c(11,22,33,44,55), BB=c("c",'a','b','a',"b"))
> dt
  AA BB
1 11  c
2 22  a
3 33  b
4 44  a
5 55  b

bigsplit(dt,"BB",splitcol = NA)
Error in bigtabulate(x, ccols = ccols, breaks = breaks, table = FALSE,  :
  REAL() can only be applied to a 'numeric', not a 'logical'