[R] R loop

[Uwe Ligges]

Petr Pikal wrote:

> 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?

Yes, AFAIR, and just tested in 1.2.2.

Uwe Ligges

> 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 at statistik.uni-dortmund.de>
> Organization:   	Fachbereich Statistik, Universitaet Dortmund
> To:             	Petr Pikal <petr.pikal at precheza.cz>
> Copies to:      	r-help at stat.math.ethz.ch, ivo welch <ivowel at 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 at gmail.com>
>>>To:             	Sean Davis <sdavis2 at mail.nih.gov>
>>>Copies to:      	piet.vanremortel at gmail.com, r-help
>>><r-help at 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 at 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 at precheza.cz
>>>
>>>______________________________________________
>>>R-help at 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 at 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 at precheza.cz