Message-ID: <x21ykwv7r1.fsf@blueberry.kubism.ku.dk>
Date: 2001-09-24T17:06:10Z
From: Peter Dalgaard
Subject: need help creating means table
In-Reply-To: <Pine.SOL.4.33.0109241107210.22118-100000@julius.ling.ohio-state.edu>
David White <dwhite at ling.ohio-state.edu> writes:
> Hello,
>
> I have been trying to use by to create a means table, but receive the
> error " by(xx, list(subjs, cons, vowels), mean)
> Error in Summary.data.frame(..., na.rm = na.rm) :
> only defined on a data frame with all numeric or complex
> variables" when the data frame consists of three factor columns (subjs,
> cons and vowels) and 5 numeric data columns.
>
> The output I'm looking for is a simple mean for each of the numeric
> columns by the independent variables subjs, vowel, consonant.
>
> Thanks for you advice,
How about
nums <- sapply(xx, is.numeric)
by(xx[nums], list(subjs, cons, vowels), mean)
?
--
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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