Hello, I have a function that looks like
f=function( type=c("dummy,"A","B,"C"), ... ) {
type<-match.arg(type)
if (type=="dummy") stop("Please choose a type that is not dummy.")
...
}
I put a "dummy" in the list of choices as a mechanism to prevent users
from not specifying a value for "type" when calling the function. My
question is whether there is a better way to achieve it that does not
need "dummy".
Thanks,
Youyi
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