Dear Peter,Thanks for the answer, it's working very well. And again sorry,
about asking as a banal question, but I really didn't have who to ask to
help me.
Uwe: I don't have a teacher, I never learned R before. I'm just trying to
learn self-educating, because it's very helpful in data manipulation....
Answering my question would not take more time, than this sour answer...

All the best!
Orsolya

2009/2/16 Peter Dalgaard <P.Dalgaard@biostat.ku.dk>

> Uwe Ligges wrote:
> >
> >
> > Vincze Orsolya wrote:
> >> There are three columns, I was just careless.
> >> I succeed to merge the two tables. But:
> >> 1) in the first table there were rows, which were not present in the
> >> second
> >> table, these rows were deleted from the merged table too, but I need
> >> them.
> >> 2) If i want to import from the second table just a certain column,
> >> not all
> >> that is missing from the first, how can i do that?
> >> 3) How can I save the generated table?
> >>
> >> Sorry about the banal questions.... I'm beginner.
> >> And thanks for the help...
> >> Have a nice day
> >
> >
> > Homework? Then please ask you course material or teacher.
>
> What makes you think that, Uwe? I don't see a teacher asking merge()
> questions to a rank beginner (I wouldn't).
>
> 1) look at the documentation: all.x=TRUE
> 2) use the usual subsetting mechanisms to work with only the relevant
> set of columns, e.g. merge(x, y[,c(1,2,6)], ....)
> 3) assign using z <- merge(x,y,....), then save() (or maybe write.table())
>
> -pd
>
>
>
> >>
> >> 2009/2/15 Peter Dalgaard <p.dalgaard@biostat.ku.dk>
> >>
> >>> Vincze Orsolya wrote:
> >>>
> >>>> Dear all,I had just started to learn R. So my question may sound a bit
> >>>> stupid for you.
> >>>> Is that possible to match and merge two tables in R? I mean I have two
> >>>> tables, in the first I have two columns: RING NUMBER,  WEIGHT and
> >>>> CAPTURE
> >>>>
> >>> Err, ... for large values of "two"? Or is one of the three a rowname?
> >>>
> >>>  DATE, in the second RING NUMBER, SEX  and CAPTURE DATE.
> >>>> 1) First I want to see, if to the ring numbers are the same, the
> >>>> capture
> >>>> dates are too?
> >>>> 2) And second if ring numbers are the same, to import the sex from the
> >>>> second table in the first.
> >>>>
> >>>> Is that possible?
> >>>>
> >>> Yes. It's a job for merge()
> >>>
> >>> --
> >>>   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
> >>>  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
> >>>  (*) \(*) -- University of Copenhagen   Denmark      Ph:  (+45)
> 35327918
> >>> ~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)              FAX: (+45)
> 35327907
> >>>
> >>
> >>     [[alternative HTML version deleted]]
> >>
> >>
> >>
> >> ------------------------------------------------------------------------
> >>
> >> ______________________________________________
> >> R-help@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.
> >
> > ______________________________________________
> > R-help@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.
>
>
> --
>    O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
>  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
>  (*) \(*) -- University of Copenhagen   Denmark      Ph:  (+45) 35327918
> ~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)              FAX: (+45) 35327907
>
>

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