Hi,
You need to specify that a is an argument to the function:
On Thu, Sep 12, 2013 at 3:56 PM, Gang Peng <michael.gang.p...@gmail.com> wrote:
> For example:
>
> a <- 1
>
> f <- function(b){
> return(a+b)
> }
>
f <- function(b, a) {
return(a+b)
}
> when we call function f(2), r will search the local environment first, if
> it cannot find a, it will search global environment, and return 3. How to
> avoid r searching the global environment and return an error when we call
> this function?
The function will now give an error if a is not specified.
Sarah
--
Sarah Goslee
http://www.functionaldiversity.org
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