There's a subtle bug in write.csv -
write.csv(mtcars, "mtcars.csv", row = FALSE)
# Error in write.table(mtcars, "mtcars.csv", row = FALSE, col.names = NA, :
# col.names = NA makes no sense when row.names = FALSE
write.csv(mtcars, "mtcars.csv", row.names = FALSE)
# Works
i.e. the special evaluation used by write.csv has broken R's regular
argument matching mechanics.
This is straightforward to fix. Replace the first line:
Call <- match.call(expand.dots = TRUE)
with
Call <- match.call(write.table, expand.dots = TRUE)
so the named arguments in write.table are used for argument matching.
Alternatively, I think you could replace the complex call munging just
by calling read.table with different default arguments:
write.csv <- function(x, file = "", sep = ",", qmethod = "double", ...) {
write.table(x = x, file = file, sep = sep, qmethod = qmethod, ...)
}
but perhaps this introduces some undesirable behaviour that I'm missing.
Hadley
--
Chief Scientist, RStudio
http://had.co.nz/
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