dQuote(x) sQuote(x)
dQuote puts double quotes around text,
and
sQuote adds single quotes.
These functions emulate R's
dQuote
and
sQuote functions.
In S-PLUS only undirectional ASCII quotation style
is provided, whereas in R localization information is considered.
warning("The argument ", dQuote("names"), " must be a character vector.")
msg <- paste("The function", sQuote("dQuote"), "is used to put", sQuote("\""),
"around a string.")
cat("lowercase letters: ", dQuote(letters), "\n")