[R] delete duplicated from data.frame

[Christian Schulz]

Uwe and Sundar,

many thanks  and sorry for my confusion with indexes,values etc..
christian


Am Dienstag, 18. Mai 2004 16:39 schrieb Uwe Ligges:
> Christian Schulz wrote:
> > Hi,
> >
> > ?unique
> > unique returns a vector, data frame or array like x * but with duplicate
> > elements removed *
> >
> > what i'm doing wrong delete duplicated rows with same MEMEBRNO.
> >
> > februar <-  dmsegment[unique(dmsegment$MEMBERNO),]
>
> unique() returns values, but not indices nor logicl values.
> Try instead:
>
> februar <-  dmsegment[!duplicated(dmsegment$MEMBERNO),]
>
> Uwe Ligges
>
> > This reduce from 197.188 rows to 184.199  but duplicated MEMBERNO  didn't
> > left all what a Primary Key setting in mysql me say and with a
> > fix(februar) could recognize .
> >
> > Courious why MEMEBRNO 4,5 ,6 and 11  are left !
> > dmsegment$MEMBERNO[1:10]
> > [1] 1  4  5  6  7  9  10  11  16  21
> >
> > februar$MEMBERNO[1:10]
> > [1] 1  6  7  9  10  16  21  26  53  72
> >
> > Using unique with a single vector it works like i expect.
> >
> >
> > P.S.
> > i try -duplcated but get not better succes?
> >
> > Many Thanks,
> > Christian
> >
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