[R] writing a simple function

[Roland Rau]

Hi,
mohamed nur anisah wrote:
> Dear lists,
>    
>   any suggestion on how to write a function to return a TRUE if interval [a,b] overlaps the interval [c,d]. I've tried it but an error occur saying that 'could not find function v ; in addition warning message occur'. Below is my codes.Please help me sort this problem as i'm in process of learning of writing a function. Many thanks


does this do what you want?

overlap <- function(a,b,c,d) {
	all(c:d %in% a:b)
}
overlap(1,5,3,4)
overlap(1,2,3,4)


Best,
Roland


>    
>   overlap<-function(m,n){
> t=length(m)
> v=length(n)
> tt=logical(t)
> tv=logical(v)
>  for(i in 1:m){
>   for(i in 1:n){
>   if(v(i,j)<=t(i,j)){
>      tt=T
>      tv=T
>    }
>   }
>  }
> k=c(tt,tv)
> return(k)
> }
>    
>   Regards,
>   Anisah
> 
>        
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