[R] dropping rows
tlumley at u.washington.edu
Thu Dec 2 02:35:03 CET 2004
On Wed, 1 Dec 2004, Liaw, Andy wrote:
> See ?subset, especially the example there.
> (I'm surprised this function isn't in R-intro...)
Much of R-intro was written as an introduction to S before R existed and
later translated, so there are quite a few things that aren't in it but
would be in a guide written from scratch.
>> From: Tobias Muhlhofer
>> 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
>> but I can't quite figure it out.
>> I would appreciate a suggestion of some syntax.
>> R-help at stat.math.ethz.ch mailing list
>> PLEASE do read the posting guide!
> R-help at stat.math.ethz.ch mailing list
> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Thomas Lumley Assoc. Professor, Biostatistics
tlumley at u.washington.edu University of Washington, Seattle
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