Re: [R] locate the rows in a dataframe with some criteria

From: Henrique Dallazuanna <wwwhsd_at_gmail.com>
Date: Fri, 07 Mar 2008 13:03:42 -0300

Try:

with(m, which((x >= 10 & y == "A")))

On 07/03/2008, zhihuali <lzhtom_at_hotmail.com> wrote:
>
> Hi, netters,
>
> This is probably a rookie question but I couldn't find the answer after hours of searching and trying.
>
> Suppose there'a a dataframe M:
>
> x y
> 10 A
> 13 B
> 8 A
> 11 A
>
> I want to locate the rows where x >=10 and y="A". I know how to do it to vectors by using
> which, but how to do it with the dataframe?
>
> Thank you very much!
>
>
> Zhihua Li
>
>
> _________________________________________________________________
> MSN 中文网,最新时尚生活资讯,白领聚集门户。
>
> [[alternative HTML version deleted]]
>
>
> ______________________________________________
> 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.
>
>

-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
______________________________________________
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.
Received on Fri 07 Mar 2008 - 16:08:54 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Fri 07 Mar 2008 - 16:30:20 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive