Re: Error in plot.aov() (PR#356)

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Subject: Re: Error in plot.aov() (PR#356)
From: Prof Brian D Ripley (ripley@stats.ox.ac.uk)
Date: Thu 02 Dec 1999 - 17:30:07 EST


Message-ID: <Pine.GSO.4.05.9912020714370.26396-100000@auk.stats>

On Thu, 2 Dec 1999 john.maindonald@anu.edu.au wrote:

> The error occurs following the third Hit <Return> below:
>
> > y_rnorm(40)
> > gp_factor(rep(1:4,c(10,10,10,10)))
> > xx.aov_aov(y~gp)
> > summary(xx.aov)
> Df Sum Sq Mean Sq F value Pr(>F)
> gp 3 0.67 0.22 0.29 0.84
> Residuals 36 28.30 0.79
> > coef(xx.aov)
> (Intercept) gp2 gp3 gp4
> 0.286147 0.260974 -0.081828 0.126678
> > plot(xx.aov)
> Hit <Return> to see next plot:
> Hit <Return> to see next plot:
> Hit <Return> to see next plot:
> Error in as.name(ylab23) : invalid type/length (1/0) in vector allocation

Interesting. There is no plot.aov on my system: this is using plot.lm.
And I get no error. It could be random, except this has nothing to do with
the data, only the labelling.

The error message means that ylab23 in NULL. I don't see how that can
happen with the system version of plot.lm.

My guess is masking. Do you have a local plot.lm? Does this happen if
you start R with --vanilla?

-- 
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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