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

[Charilaos Skiadas]

On Mar 7, 2008, at 10:50 AM, zhihuali 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?
>

Does ?subset do what you want?

> Thank you very much!
>
>
> Zhihua Li
>

Haris Skiadas
Department of Mathematics and Computer Science
Hanover College