Can you pass a vector to a vararg?: Vector to sprintf

Question

Let\'s say I have a function that takes variable arguments, such as sprintf(). I want something like:

sprintf(\"%s %s\", \"a\", \"b\")

but

Answer 1

You can use do.call:

vec <- c("a","b")
do.call(sprintf, c(list("%s %s"), vec))
# [1] "a b"