R help - Feb 2009 - problem with subsetting in compating one column with a vector

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]]

Hi

r-help-bounces at r-project.org napsal dne 03.02.2009 09:11:52:
> Hi all,
> I got one problem with    "subset()"    function
> 
> hear i executed:
> 
> findings1<-subset(findings,SUBJECTSID==SUBJECTS1$SUBJECTSID,select=c
+ (SUBJECTSID,ORGNUMRES))

Error in subset(findings, SUBJECTSID == SUBJECTS1$SUBJECTSID, select = 
c(SUBJECTSID,  : 
  object "findings" not found

Gives me an error. Strange, is it possible that I do not have SUBJECTS1 or 
SUBJECTSID on my computer?

however

subset(iris, subset=iris$Species=="virginica",
select=c("Sepal.Length",
"Petal.Length"))
    Sepal.Length Petal.Length
101          6.3          6.0
102          5.8          5.1
103          7.1          5.9
104          6.3          5.6
105          6.5          5.8
106          7.6          6.6

works as expected

Or you can use
iris[iris$Species=="virginica", c(1,3)]

to get same result without using subset.

Regards
Petr

> 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]]
> 
> ______________________________________________
> R-help at 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.

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]]
> 
> ______________________________________________
> R-help at 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.
> 
> 
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