Hi all,
Can help me understand why write.csv manipulates a call object instead
of simply calling write.table with modified arguments? I would have
written write.csv as:
write.csv <- function (...) {
Call <- match.call(expand.dots = TRUE)
for (argname in c("append", "col.names",
"sep", "dec", "qmethod")) {
if (!is.null(Call[[argname]]))
warning(gettextf("attempt to set '%s' ignored",
argname),
domain = NA)
write.table(..., sep = ",", dec = ".", qmethod =
"double")
}
The current approach breaks partial argument matching for row.names:
write.csv(mtcars, "mtcars-1.csv", row = F)
write.table(mtcars, "mtcars-2.txt", row = F)
write.csv(mtcars, "mtcars-2.csv", row.names = F)
What's the advantage of manipulating the call?
Hadley
--
Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/