From ripley@stats.ox.ac.uk  Tue Jun 11 08:24:15 2002
From: ripley@stats.ox.ac.uk (ripley@stats.ox.ac.uk)
Date: Tue, 11 Jun 2002 09:24:15 +0200 (MET DST)
Subject: Crashing R (PR#1651)
Message-ID: <200206110724.JAA29161@pubhealth.ku.dk>

On Mon, 10 Jun 2002 rjvbertin@hotmail.com wrote:

>
> Concerns: R 1.5.0 gui version, Windows (downloaded binary) and Linux
> (installed from sources).
>
> # Load the data from the attached file:
> kk<-read.table("__filename__", header=1)
> # attach the data:
> attach(kk)
> Snr<-factor(Snr)
> # fool around with a call to anova.glm():
> anova.glm( aov( nFD~Type+size+Modality+Error(Snr/(Type+size+Modality)) ) )
> # Error: object nFD not found
> # Well, I thought I had attached that. Anyway:
> anova.glm(aov( nFD~Type+size+Modality+Error(Snr/(Type+size+Modality))),
> data=kk)

Why are you calling anova.glm on an object of class c("aovlist",
"listof")?  Also, why give the data = kk argument to anova.glm (which does
not have such an argument)?

I have no idea what you intended, but there is no anova method for
a multistratum aov fit.  I suggest you look at the print and summary
methods.

> # Same message
> # In addition, warning message:
> <lots of output>
> R dumps core. On Windows, it crashes in <unknown module>.
>
> Also not that the 1st (Snr) column is not automatically converted in a
> factor, despite the fact that it consists of strings!

All text files are strings. It is a column of integer numbers, and so is
converted to an integer variable in R.

If you wanted something different, read ?read.table and set colClasses.


-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595


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Crashing R (PR#1651)
ripley@stats.ox.ac.uk