R help - Jun 2009 - Partial loop?

My dear R buddies,

I'm writing a loop program like this:

for(i in 1:n){
   for(j in 1:i){
    ...
   }
}

I wonder if there is any simple apply()-like function to make the loop
a little bit easier and faster. Thanks a lot.

Best wishes,

-- 
??? Hesen Peng
http://hesen.peng.googlepages.com/

Finally I ended up doing this:

temp <- expand.grid(1:n,1:n)
temp<-temp[temp[,1]>temp[,2]]

apply(temp,1, ... )

and it seems much faster :)

On Sat, Jun 27, 2009 at 3:26 PM, Patrick Burns<pburns at
pburns.seanet.com> wrote:
> See 'The R Inferno'.
>
>
>
> Patrick Burns
> patrick at burns-stat.com
> +44 (0)20 8525 0696
> http://www.burns-stat.com
> (home of "The R Inferno" and "A Guide for the Unwilling S
User")
>
>
> Hesen Peng wrote:
>>
>> My dear R buddies,
>>
>> I'm writing a loop program like this:
>>
>> for(i in 1:n){
>> ? for(j in 1:i){
>> ? ?...
>> ? }
>> }
>>
>> I wonder if there is any simple apply()-like function to make the loop
>> a little bit easier and faster. Thanks a lot.
>>
>> Best wishes,
>>
>


-- 
??? Hesen Peng
http://hesen.peng.googlepages.com/