[R] bug or feature?

Bert Gunter gunter.berton at gene.com
Thu May 17 21:29:52 CEST 2007

... but it **is** explicitly documented in ?subset:

"For data frames, the subset argument works on the rows. Note that subset
will be evaluated in the data frame, so columns can be referred to (by name)
as variables in the expression (see the examples). " 

Bert Gunter
Genentech Nonclinical Statistics

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of ivo welch
Sent: Thursday, May 17, 2007 11:53 AM
To: jim holtman
Cc: r-help
Subject: Re: [R] bug or feature?

ahh...it is the silent substitution of the data frame in the subset
statement.   I should have known this.  (PS: this may not be desirable
behavior; maybe it would be useful to issue a warning if the same name
is defined in an upper data frame.  just an opinion...)

mea misunderstanding.


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