R help - Nov 2008 - multiple "next" in for loops?

Dear R list,


I was wondering if there is an easy fix to this problem (there are workarounds,
as always):

Within a for loop, we can use "next" to skip to the next index,
but how can we skip the next n indices?

So, I would like something that looks like;

for(i in 1:10){

   if(somecondition)next(5)

}

Is there a way?


thanks,
Remko



(sorry for potential double posting, last version was HTML I think)

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 Live

On 11/11/2008 8:16 PM, remko duursma wrote:
> 
> Dear R list,
> 
> 
> I was wondering if there is an easy fix to this problem (there are
workarounds, as always):
> 
> Within a for loop, we can use "next" to skip to the next index,
> but how can we skip the next n indices?
> 
> So, I would like something that looks like;
> 
> for(i in 1:10){
> 
>    if(somecondition)next(5)
> 
> }
> 
> Is there a way?
Don't use a for loop, use a while loop:

i <- 1
while (i < 11) {
   if (somecondition) i <- i+5
   else {
     blah blah blah
     i <- i+1
   }
}

Duncan Murdoch

from the top of my head (ugly but works).
jumps 5 if i==2 or i==8


j = 0
for(i in 1:15){
    if((i==2)||(i==8)){
        print(i)
        j=i+5
        next
    }
    if (i>=j){
        print(i)
    }else{
        next
    }
}