make_fromids | R Documentation |
given a set of index ids as retrieved from make_index_ids return an adjacency matrix with pointers to identifiers that flow to the row of the matrix in question.
make_fromids(index_ids, return_list = FALSE, upmain = NULL)
index_ids |
data.frame as returned by make_index_ids |
return_list |
logical if TRUE, the returned list will include a "froms_list" element containing all from ids in a list form. |
upmain |
data.frame containing |
list containing a "froms" matrix, "lengths" vector, and optionally "froms_list" elements.
x <- data.frame(id = c(1, 2, 3, 4, 5, 6, 7, 8, 9),
toid = c(2, 3, 4, 5, 0, 7, 8, 9, 4))
y <- make_index_ids(x)
make_fromids(y)
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