Re: [R] R loop

From: Petr Pikal <petr.pikal_at_precheza.cz>
Date: Tue 07 Feb 2006 - 19:08:07 EST

Hi

you are correct as usually. It is about 10 versions 1.2.0 - 2.2.1 and as there are 2 versions per year it is about 4-5 years.

But nevertheless it seems to me as if I used R forever (and hopefully it will continue)

Anyway subsetting data frames **was** similar in the old versions as it is now, wasn't it?

Cheers
Petr

On 7 Feb 2006 at 8:56, Uwe Ligges wrote:

Date sent:      	Tue, 07 Feb 2006 08:56:10 +0100
From:           	Uwe Ligges <ligges@statistik.uni-dortmund.de>
Organization:   	Fachbereich Statistik, Universitaet Dortmund
To:             	Petr Pikal <petr.pikal@precheza.cz>
Copies to:      	r-help@stat.math.ethz.ch, ivo welch <ivowel@gmail.com>
Subject:        	Re: [R] R loop

> Petr Pikal wrote:
>
> > Hi
> >
> > On 6 Feb 2006 at 15:57, ivo welch wrote:
> >
> > Date sent: Mon, 6 Feb 2006 15:57:30 -0500
> > From: ivo welch <ivowel@gmail.com>
> > To: Sean Davis <sdavis2@mail.nih.gov>
> > Copies to: piet.vanremortel@gmail.com, r-help
> > <r-help@stat.math.ethz.ch> Subject: Re: [R] R loop
> >
> >
> >>>>data[ data$a == "name2" ] # does not work and gives a weird
> >>>>result, yuck
> >>>
> >>> data[data$a=="name2",]
> >>>
> >>
> >>sorry about this. I believe a few versions back, one could not
> >>subset data frames, so I did not even check what I wrote. Works
> >>now.
> >
> >
> > It depends on what you consider few versions back. I started with R
> > vesion 1.2.0 about 10 years
>
> I bet 200$ (or EUR) you have not used R 10 years ago. ;-)
>
> People certainly remember the 1.0.0 release at the remarkable day
> 29-FEB-2000. 1.2.0 was released in December 2000, about 5 years ago. I
> started with 0.62.x in 1998. The oldest version I found on CRAN is a
> pre-alpha R.sea.hqx for the Mac
> dated 07-Nov-1996.
>
>
> Uwe Ligges
>
>
>
>
>
> > ago and I believe that data frame
> > subsetting was done in **very** similar manner as it is performed
> > now.
> >
> > Cheers
> > Petr
> >
> >
> >>>Look at ?order.
> >>
> >>I know. This is why I suggested only that we need a wrapper that
> >>plugs an order() functionality into the sort() function (which
> >>fortunately points in its docs to order)---but novices would find
> >>the sort syntax easier.
> >>
> >>regards,
> >>
> >>/iaw
> >>
> >>______________________________________________
> >>R-help@stat.math.ethz.ch mailing list
> >>https://stat.ethz.ch/mailman/listinfo/r-help
> >>PLEASE do read the posting guide!
> >>http://www.R-project.org/posting-guide.html
> >
> >
> > Petr Pikal
> > petr.pikal@precheza.cz
> >
> > ______________________________________________
> > R-help@stat.math.ethz.ch mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide!
> > http://www.R-project.org/posting-guide.html
>
> ______________________________________________
> R-help@stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html

Petr Pikal
petr.pikal@precheza.cz



R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Tue Feb 07 19:16:15 2006

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