> x<-numeric(1)
> x
[1] 0
> x[2]<-2
> x
[1] 0 2
you don't really need to define the length?
Am 10.04.2012 um 17:45 schrieb Albyn Jones:
> Here are a couple of constructions that work.
>
> albyn
> ===========================================
>
> num <- rep(0,10)
> for (i in 2:10) {
> num[i] <- num[i-1] + 5
> if(num[i] > 20) break
> }
>> num
> [1] 0 5 10 15 20 25 0 0 0 0
>
> or
>
> num <- rep(0,10)
> done <- FALSE
> i <- 2
> while(!done){
> num[i] <- num[i-1] + 5
> if(num[i] > 20) done <- TRUE
> i <- i + 1
> }
>> num
> [1] 0 5 10 15 20 25 0 0 0 0
>
>
> On Tue, Apr 10, 2012 at 10:48:34AM -0400, Steve Lavrenz wrote:
>> Everyone,
>>
>> I'm very new to R, especially when it comes to loops and functions, so
>> please bear with me if this is an elementary question. I cannot seem to
>> figure out how to construct a loop which runs a function until a certain
>> value is computed. For example, say I have the following:
>>
>> num = numeric (10)
>> num [1] = 0
>> for (i in 2:10) {
>> num [i] = num [i-1] + 5
>> }
>>
>> This adds 5 to the preceding spot of a vector of length 10 to get the value
>> in the current spot. However, say I don't just want to run this for 10
>> spots; rather I want to run it until a certain value (say, 100) is computed.
>> How I construct my loop to do this?
>>
>> Thanks!
>>
>>
>> [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
> --
> Albyn Jones
> Reed College
> jo...@reed.edu
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
