[R] problem with subsetting in compating one column with a vector

[David Freedman]

Do you really want to use '==' ?  How about '%in%', as in

findings1<-subset(findings,SUBJECTSID %in% SUBJECTS1$SUBJECTSID,
select=c(SUBJECTSID,ORGNUMRES))

David Freedman



dvkirankumar wrote:
> 
> Hi all,
> I got one problem with    "subset()"    function
> 
> hear i executed:
> 
> findings1<-subset(findings,SUBJECTSID==SUBJECTS1$SUBJECTSID,select=c(SUBJECTSID,ORGNUMRES))
> hear     "SUBJECTS1$SUBJECTSID"     vector contains nearly  "65"  values
> the problem is after comparing and subsetting its not giving
> 
> all the values related to that instead its giving randam values
> 
> and giving warning that:
> 
> 
> 
> Warning message:
> In SUBJECTSID == SUBJECTS1$SUBJECTSID :
>   longer object length is not a multiple of shorter object length
> 
> 
> can any one suggest what I can do to retreave all the related data of
> subset
> and store in one object
> 
> 
> thanks in advance
> 
> regards;
> kiran
> 
> 	[[alternative HTML version deleted]]
> 
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