[R] Outputing multilple subsets

Ista Zahn istazahn at gmail.com
Mon Nov 9 01:53:31 CET 2009


Have you considered using split?

-Ista

On Sun, Nov 8, 2009 at 7:23 PM, rusers.sh <rusers.sh at gmail.com> wrote:
> Hi Rusers,
>  I hope to divide the original dataset into several subsets and output
> these multilple datasets. But errors appeared in my loops. See example.
> ######
> a<-c(1:10)
> b<-c(rep(1,3),rep(2,3),rep(3,4))
> c<-data.frame(a,b)  #c is the example data
> num<-c(unique(b))
> # I hope to get the subsets c_1.csv,c_2.csv and c_3.csv
> #Errors
> for (i in num)  {
>   c_num<-c[c$b==num,]
>   write.csv(c_num,file="c:/c_num.csv")
> }
>
> Warning messages:
> 1: In c$b == num :
>  longer object length is not a multiple of shorter object length
> 2: In c$b == num :
>  longer object length is not a multiple of shorter object length
> 3: In c$b == num :
>  longer object length is not a multiple of shorter object length
>  I think the problem should be file="c:/c_num.csv", anybody has ever met
> this problem?
>  Thanks very much.
> -----------------
> Jane Chang
> Queen's
>
>        [[alternative HTML version deleted]]
>
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> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org



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