On Tue, Oct 9, 2012 at 11:42 AM, Rui Barradas <ruipbarradas@sapo.pt> wrote:

> Hello,
>
> Try
>
> do.call(data.frame, by.list)
>
>
I don't think data.frame inside do.call works in this context. May need it
on the outside to do the job (Only OK here since there is no mixture of
numeric and character/factors in this summary). Something like

by.list <- by(warpbreaks[, 1], warpbreaks[, -1], summary)
by.dtfrm <- data.frame( do.call( rbind, by.list ) )
by.dtfrm <- cbind( do.call( expand.grid, attr( by.list, 'dimnames' ) ),
by.dtfrm )




Hope this helps,
>
> Rui Barradas
> Em 09-10-2012 17:53, Jesus Frias escreveu:
> > Dear R-helpers,
> >
> >
> >
> > I've got a summary of results from a by() call that I am making with a
> list
> > of more than two of factors not very different from the example in the
> by()
> > help page
> >
> >
> >
> > require(stats)
> >
> > by(warpbreaks[, 1],   warpbreaks[, -1],       summary)
> >
> >
> >
> > The result of the command gives a list of the form
> >
> >
> >
> > wool: A
> > tension: L
> >     Min. 1st Qu.  Median    Mean 3rd Qu.    Max.
> >    25.00   26.00   51.00   44.56   54.00   70.00
> > ---------------------------------------------------
> > wool: B
> > tension: L
> >     Min. 1st Qu.  Median    Mean 3rd Qu.    Max.
> >    14.00   20.00   29.00   28.22   31.00   44.00
> > ---------------------------------------------------
> >
> > .... And so on.
> >
> >
> >
> >
> >
> > I would like to convert this result in to a flat data.frame with variable
> > names:
> >
> >
> >
> > Wool, Tension, Min, 1stQ, Median, Mean, 3rdQ, Max
> >
> > A, L , 25.00   26.00   51.00   44.56   54.00   70.00
> > B,  L, 14.00   20.00   29.00   28.22   31.00   44.00
> >
> > ....
> >
> >
> >
> >
> >
> > Although I've tried the argument "simplify=T" I haven't been able to get
> > this converted.
> >
> >
> >
> > Is there a simple way to achieve this?
> >
> >
> >
> > Thanks in advance!
> >
> >
> >
> > Regards,
> >
> >
> >
> > Jesus
> >
> >
> >
> > Jesús María Frías Celayeta, PhD
> >
> > Ceann Cúntóir, Scoil Eolaíocht an Bhia agus Sláinte an Chomhshaoil
> >
> > Assistant Head, School of Food Science and Environmental Health,
> >
> > Coláiste Eolaíochtaí agus Sláinte/ College of Sciences and Health,
> >
> > Institiúid Teicneolaíochta Átha Cliath/ Dublin Institute of Technology,
> >
> > Sráid Chathal Brugha, Baile Átha Cliath 1, Éire/Cathal Brugha Street,
> Dublin
> > 1, Ireland
> >
> > F: +353-1-4024459
> >
> > E:  <mailto:james.curtin@dit.ie> jesus.frias@dit.ie
> >
> > W: http://fseh.dit.ie/o4/StaffListing/JesusFrias.html
> >
> >
> >
> >
> >
> >
> >
> > Tá an teachtaireacht seo scanta ó thaobh ábhar agus víreas ag Seirbhís
> Scanta Ríomhphost de chuid Seirbhísí Faisnéise, ITBÁC agus meastar í a
> bheith slán.  http://www.dit.ie
> >
> > This message has been scanned for content and viruses by the DIT
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> >
> >
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> >
> >
> >
> > ______________________________________________
> > 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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>
>
> ______________________________________________
> 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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