lengths for recursive lists
rlengths(x, doSum = NULL, ...)list or vector
logical indicating whether to return the overall sum
of lengths. When NULL it will return the aggregate length of
each list element in x. When FALSE it will return the same
list structure of x, with the length of each. When TRUE it will
return the total length of all elements in x as one value.
additional parameters are ignored
When doSum is NULL (default) it returns an integer vector
with length length(x) and names names(x),
whose values are the total number of elements in each item in
x after running base::unlist().
When doSum=="TRUE", it returns the single integer length of
all elements in x.
When doSum=="FALSE", it returns the full structure of x with the
integer length of each element.
The parameter doSum is intended for internal use, during
recursive calls of rlengths() to itself. When doSum is NULL or
TRUE, recursive calls to rlengths() set doSum=TRUE.
This function takes a list as input, and returns the length
of each list element after running base::unlist().
Other jam list functions:
cPasteSU(),
cPasteS(),
cPasteUnique(),
cPasteU(),
cPaste(),
heads(),
jam_rapply(),
list2df(),
mergeAllXY(),
mixedSorts(),
rbindList(),
relist_named(),
sclass(),
sdim(),
uniques(),
unnestList()
x <- list(
A=list(
A1=nameVector(1:3, letters[1:3]),
A2=list(
A1a=nameVector(4:7, letters[4:7]),
A1b=nameVector(11:14, letters[11:14]))),
B=list(B1=nameVector(1:9, letters[1:9]),
B2=nameVector(20:25, letters[20:25])));
# default lengths(x) shows length=2 for A and B
lengths(x)
#> A B
#> 2 2
# rlengths(x) shows the total length of A and B
rlengths(x)
#> A B
#> 11 15