[R] outliers in Box Plot

[Jim Lemon]

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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