[R] What is the R equivalent of STATA's 'drop' command?

[John C Frain]

Try something like

 rm(list=ls(pattern="y+"))

John

2009/2/10 stephen sefick <ssefick at gmail.com>:
> It depends on how the data is set up (I am not an expert), but I have
> had good results with the subset function.  subset(x, var!=3 & var!=4)
>  this will take the subset of the dataframe x where var is not equal
> to 3 or 4.
>
> a <- rnorm(25)
> var <- rep(c(1:5), 5)
> x <- data.frame(a, var)
> subset(x, var!=3 & var!=4)
>
> Is this what you want?
>
> Stephen Sefick
>
> On Mon, Feb 9, 2009 at 7:27 PM, jjh21 <jjharden at gmail.com> wrote:
>>
>> Hello,
>>
>> I am trying to do some data cleaning in R. I need to drop observations that
>> take on certain values of a variable. In STATA I might type something like:
>>
>> drop if <variable name> == 3
>> drop if <variable name> == 4
>>
>> Is there an R equivalent of this? I have tried playing around with the
>> subset command, but it seems a bit clunky. What would an advanced R user's
>> approach be for something like this?
>>
>> Thank you!
>>
>>
>> --
>> View this message in context: http://www.nabble.com/What-is-the-R-equivalent-of-STATA%27s-%27drop%27-command--tp21925249p21925249.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
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>>
>
>
>
> --
> Stephen Sefick
>
> Let's not spend our time and resources thinking about things that are
> so little or so large that all they really do for us is puff us up and
> make us feel like gods.  We are mammals, and have not exhausted the
> annoying little problems of being mammals.
>
>                                                                -K. Mullis
>
> ______________________________________________
> R-help at 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.
>



-- 
John C Frain
Trinity College Dublin
Dublin 2
Ireland
www.tcd.ie/Economics/staff/frainj/home.html
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