Generates a contingency table based on 'from' (infector) and 'to' (infectee) vectors.
Usage
ttable(from, to, levels = NULL, ...)
Arguments
- from
A vector of infectors.
- to
A vector of infectees.
- levels
Optional. A vector of factor levels. Defaults to the unique, sorted values of 'from' and 'to'.
- ...
Additional arguments passed to the table function.
Value
A contingency table of infectors (rows) and infectees (columns).
Examples
from <- c("A", "A", NA, "C", "C", "C")
to <- c("A", "B", "B", "C", "C", "C")
ttable(from, to)
#> to
#> from A B C
#> A 1 1 0
#> B 0 0 0
#> C 0 0 3
