Message-ID: <x24rru150l.fsf@blueberry.kubism.ku.dk>
Date: 2001-07-30T21:27:54Z
From: Peter Dalgaard
Subject: functions, `...' and .Rprofile
In-Reply-To: mmiller3@iupui.edu's message of "30 Jul 2001 15:01:26 -0500"
mmiller3 at iupui.edu (Michael A. Miller) writes:
> I'm experiencing some confusion with the ellipsis argument
> (...).
>
> In my .Rprofile, I have the following functions:
>
> stderr <- function(x, ...) {
> sqrt( var(x, ...) / length(x) )
> }
> se <- stderr
...
> If I use stderr instead, I don't get that error:
>
> > tapply( Diameter, factor(Region), stderr, na.rm=TRUE )
> I II III IV V
> 0.005167949 0.004405095 0.006588870 0.006633189 0.001857812
I know that's not what you were asking, but you're not getting
the correct result either... You'd need to divide by sum(!is.na(x))
rather than length(x).
--
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
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