Re: [R] questions on aggregate data

From: Jacques VESLOT <jacques.veslot_at_good.ibl.fr>
Date: Wed 02 Aug 2006 - 18:11:11 EST

data.frame(x = with(df1, rep(x, freq)))



Jacques VESLOT

CNRS UMR 8090
I.B.L (2ème étage)
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zhijie zhang a écrit :
> Dear friends,
> my question is how to aggregate dataset and the inverse manipulation.
> e.g.My dataset
> data structure1:
> x
> 1
> 1
> 2
> 3
> 3
> data structure2:
> x freq
> 1 2
> 2 1
> 3 2
> Then how to generate dataset2 from dataset1 and generate dataset1 from
> dataset2?
>
> e.g. dataset2 from dataset1 :
> x<-c(1,1,2,3,3)
> a<-tab(x)
> as.data.frame(a)
>
> *But i can't do the inverse manipulation:generate dataset1 from dataset2*,
> anybody can help me on the two different manipulations?
>
> Thanks a lot!
>
>
>
>
>



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