[R] Integrate na.rm in own defined functions
Alexander Engelhardt
alex at chaotic-neutral.de
Wed Apr 20 13:04:54 CEST 2011
Am 20.04.2011 10:59, schrieb Mauro:
> It`s probably an easy question, but couldn`t figure it out.
>
> I`ve defined a function like:
>
> rmse<-function (x){
> dquared<-x^2
> sum1<-sum(x^2)
> rmse<-sqrt((1/length(x))*sum1)
> rmse}
>
> My problem is, that I have NA Values in x and the above function returns NA.
>
> I`m looking for a way to use "na.rm=TRUE" like in for instance
> mean(x,na.rm=TRUE).
If you had no sum function to give the "na.rm=TRUE" parameter, you can
add the tiny line to your code:
x <- x[!is.na(x)]
Or give your function a na.rm parameter yourself:
rmse<-function (x, na.rm=FALSE){
if(na.rm==TRUE){
x <- x[!is.na(x)]
}
dquared<-x^2
sum1<-sum(x^2)
rmse<-sqrt((1/length(x))*sum1)
rmse
}
More information about the R-help
mailing list