[R] Odp: Data manipulation question

[Petr PIKAL]

Petr PIKAL/CTCAP napsal dne 10.10.2007 15:03:28:

> r-help-bounces at r-project.org napsal dne 10.10.2007 13:55:32:
> 
> > Hi Petr,
> > 
> > > d$z<-NA
> > > d$z[d$x %in% d$id] <- d$y[d$id %in% d$x]
> > >
> > > works in this particular case but it means you do not have multiple 
same 
> > > ids and X
> > 
> > Thanks for the idea. But the problem is that I can have multiple
> > ids...
> > 
> > In fact in the meantime I found a solution by using row names :

> are you sure?
> 
> Why 13 in row 5. And using your code my result is
> 
> > d
>     id    x  y
> 1 0001 <NA> 21
> 2 0002 <NA> 13
> 3 0003 0001 45
> 4 0004 <NA> 71
> 5 0005 0003 20
> > d$z <- NA
> > rownames(d) <- d$id
> > d$z <- d[d$x,"y"]
> > d
>        id    x  y  z
> 0001 0001 <NA> 21 21
> 0002 0002 <NA> 13 21
> 0003 0003 0001 45 13
> 0004 0004 <NA> 71 21
> 0005 0005 0003 20 45
> 
> Regards
> Petr

And the reason is that I had <NA> as an extra level in d$x

Petr

> 
> > 
> > 
> > Thanks for your help,
> > 
> > Julien
> > 
> > -- 
> > Julien Barnier
> > Groupe de recherche sur la socialisation
> > ENS-LSH - Lyon, France
> > 
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