Hi
probably merge is what you want
see
?merge
Regards
Petr
r-help-boun...@r-project.org napsal dne 29.04.2010 09:13:34:
> Thanks Tengfei,
> I have another question.
> > df=data.frame(name=c('AA','BB',
'CC'),c1=c(23,123,5),c2=c(54,5,4),c3=c(0.
> 999,1,23),c4=c(0.78,0.99,54))
> > df
> name c1 c2 c3 c4
> 1 AA 23 54 0.999 0.78
> 2 BB 123 5 1.000 0.99
> 3 CC 5 4 23.000 54.00
>
> > df1=data.frame(name=c('BB','AA', 'DD'),c5=c(98,87,54),c6=c(7,6,3))
> > df1
> name c5 c6
> 1 BB 98 7
> 2 AA 87 6
> 3 DD 54 3
>
> now I want to get interaction for df and df1 in terms of name. this is
> name c1 c2 c3 c4 c5 c6
> AA 23 54 0.999 0.78 87 6
> BB 123 5 1.000 0.99 98 7
>
> could give advice?
>
>
>
>
> --- On Thu, 29/4/10, Tengfei Yin <yinteng...@gmail.com> wrote:
>
> From: Tengfei Yin <yinteng...@gmail.com>
> Subject: Re: [R] by funtion
> To: "Petr PIKAL" <petr.pi...@precheza.cz>
> Cc: "Yuan Jian" <jayuan2...@yahoo.com>, r-help@r-project.org
> Received: Thursday, 29 April, 2010, 6:44 AM
>
> Hi,
> Thanks, actually I mentioned in the reply, you need to turn the matrix
into
> data frame in the end if use this method. e.g
> >
df=data.frame(name=c('AA','BB','AA'),c1=c(23,123,203),c2=c(54,5,98),c3=c(0.
> 999,1,0.79),c4=c(0.78,0.99,0.99))
>
> > aa=by(df[,2:5],df$name,mean)> dd=do.call('rbind',aa)>
df=data.frame(dd)>
> df c1 c2 c3 c4AA 113 76 0.8945 0.885
>
> BB 123 5 1.0000 0.990
> Regards
> TengfeiOn Thu, Apr 29, 2010 at 1:30 AM, Petr PIKAL
<petr.pi...@precheza.cz> wrote:
>
>
> Hi
>
>
>
> r-help-boun...@r-project.org napsal dne 29.04.2010 08:11:41:
>
>
>
> > Hi
>
> >
>
> > you could try
>
> >
>
> > do.call('rbind',aa)
>
>
>
> No, No, No. rbind and cbind binds vectors as rows or columns of
>
> ***matrix***, result is not a data frame
>
>
>
> do.call("rbind",aa)
>
> X069rutil X102anatas
>
> 105 26.9 7.9
>
> 200 22.8 10.6
>
> 400 30.6 13.3
>
> 600 50.8 20.6
>
> 800 78.7 NA
>
> exp.df<-do.call("rbind",aa)
>
> str(exp.df)
>
> num [1:5, 1:2] 26.9 22.8 30.6 50.8 78.7 7.9 10.6 13.3 20.6 NA
>
> - attr(*, "dimnames")=List of 2
>
> ..$ : chr [1:5] "105" "200" "400" "600" ...
>
> ..$ : chr [1:2] "X069rutil" "X102anatas"
>
>
>
> If some object has rectangular shape and has column names it does not
>
> automatically mean that it is data frame
>
>
>
> Regards
>
> Petr
>
>
>
>
>
> >
>
>
>
> >
>
> > then turn the matrix into data frame
>
> >
>
> > regards
>
> >
>
> > Tengfei
>
> >
>
> > On Wed, Apr 28, 2010 at 10:56 PM, Yuan Jian <jayuan2...@yahoo.com>
>
> wrote:
>
> >
>
> > > Hello,
>
> > >
>
> > > I have a data.frame:
>
> > > name col1 col2 col3 col4
>
> > > AA 23 54 0.999 0.78
>
> > > BB 123 5 1 0.99
>
> > > AA 203 98 0.79 0.99
>
> > >
>
> > > I want to get mean value data.frame in terms of name:
>
> > >
>
> > > name col1 col2 col3 col4
>
> > >
>
> > > AA 113.0000 76.0000 0.8945 0.8850
>
> > >
>
> > > BB 123.00 5.00 1.00 0.99
>
> > >
>
> > > I tried to use by function:
>
> > >
>
> > > >aa<-by(test[,2:5], feature, mean)
>
> > > I found aa is "by" function.
>
> > > > class(aa)
>
> > > [1] "by"
>
> > >
>
> > > how can I transfer aa to a data frame?
>
> > >
>
> > > thanks
>
> > > YU
>
> > >
>
> > >
>
> > >
>
> > >
>
> > >
>
> > >
>
> > > [[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.
>
> > >
>
> > >
>
> >
>
> >
>
> > --
>
> > Tengfei Yin
>
> > MCDB PhD student
>
> > 1620 Howe Hall, 2274,
>
> > Iowa State University
>
> > Ames, IA,50011-2274
>
> > Homepage: www.tengfei.name
>
> >
>
> > [[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.
>
>
>
>
>
>
> --
> Tengfei Yin
> MCDB PhD student
> 1620 Howe Hall, 2274,
> Iowa State University
> Ames, IA,50011-2274
> Homepage: www.tengfei.name
>
>
>
>
>
>
>
>
>
> [[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.
______________________________________________
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and provide commented, minimal, self-contained, reproducible code.
