Hi Rosa,
Your data never seem to get through. Nevertheless, here is a suggestion:
rodat<-data.frame(id=1:20,age=sample(c("10-20","21-30","31-40"),20,TRUE),
weight=c(sample(40:70,18),110,120))
robp<-boxplot(weight~age,rodat)
rodat$id[which(rodat$weight %in% robp$out)]
Jim
On Mon, Sep 5, 2016 at 9:38 PM, Rosa Oliveira <rosita21 at gmail.com>
wrote:> Dear all,
>
> I have searched all over and didn?t found an answer :(
>
> I need urgently to "extract" de identification of the weight
outliers of
> the participants of a study.
>
> So, I have a data base with several variables:
> id
> weight
> are 2 off them.
>
> So, I've done a boxplot and found the weight have outliers. Now I need
to
> identify the id's of those participants.
> I can get the outliers values, nonetheless lots os them are not correct for
> some vriables.
>
> Can you please help me?
>
> boxplot(WEIGHT~AGE,baseR,range=3) #print WEIGHT boxplot
> boxplot(WEIGHT~AGE==1,,baseR,range=3, plot=FALSE)$out # find outliers
> values to age 1 (example)
>
>
> I attach the data.
>
> Best,
> Rosa Oliveira
>
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