[R] SOLVED: how to check if ... is empty

[Thomas Roth (geb. Kaliwe)]

Thank you both.

Thomas

Dimitris Rizopoulos schrieb:
> one way is:
>
> test <- function(x, y, ...) {
>     dots <- list(...)
>     if (length(dots)) cat("\nnon-empty\n") else cat("\nempty\n")
> }
>
> test(1, 1)
> test(1, 1, 1)
>
>
> I hope it helps.
>
> Best,
> Dimitris
>
>
> Thomas Roth (geb. Kaliwe) wrote:
>> Hi,
>>
>> I was wondering what would be the best way to check if the three dots 
>> argument contains any arguments (i.e. does ... contain any arguments 
>> or not? )
>>
>> #Example
>>
>> test = function(x,y, ...)
>> {
>>    #Wanted R-Code
>>    # if(empty(...))
>>    #    do some calculation
>>
>>
>>    plot(x,y,...)
>>
>> }
>>
>> Thanks
>>
>> Thomas Roth
>>
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>