[R] dropping rows

[Liaw, Andy]

See ?subset, especially the example there.

(I'm surprised this function isn't in R-intro...)

Andy

> From: Tobias Muhlhofer
> 
> Hi!
> 
> Sorry for asking a trivial questions, but I can't seem to 
> figure this out.
> 
> I have a dataframe called master containing 30-odd variables.
> 
> In this dataframe, I have observations across these 30 variables from 
> 1930 to 2003 (I've made a "year" variable). How can I drop 
> all rows for 
> which the year is less than 1960? I'm assuming something with 
> ifelse() 
> but I can't quite figure it out.
> 
> I would appreciate a suggestion of some syntax.
> 
> Thanks!
> 	Toby
> 
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