Question
> printmessage2 <- function(x) {
+ if(is.na(x))
+ print("x is a missing value!")
+ else if(x > 0)
+ print("x is greater than zero")
+ else
+ print("x is less than or equal to zero")
+ invisible(x)
+ }
> printmessage2(NA)a.
“x is a missing value!”
b.
“x is greater than zero”
c.
“x is less than or equal to zero”
d.
Error
Posted under Scoping Rules and Debugging R Programming
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