R help - Mar 2004 - Error in "names<-.default"(`*tmp*`, value = nmstrata) :

Hi,

I have a problem with aov(). I used it many times, but now I have new data, 
tried to use it in the same way. I get I strange Error message that i can't 
understand (see below). I guess it is caused by incompatible data types. The 
dataframe also looks ok to me.

I use:
spk
=factor(rep(c("spk1","spk2","spk3","spk4","spk5","spk6","spk7","spk8"),
c(2,2,2,2,2,2,2,2)))
cs = factor(rep(c("yes","no"),c(8,8)))
sub = factor(sort(spaeVP))
rati = stack(data.frame(arousal))
rati = rati[,1]
rating.df <-  data.frame(sub, cs, spk, rati)
summary(aov(rati ~ cs*spk + Error(sub/(cs*spk)), data=rating.df))

I get this Error (after about 5sec):
Error in "names<-.default"(`*tmp*`, value = nmstrata) : 
	names attribute must be the same length as the vector
> rating.df
    sub  cs  spk rati
1     5 yes spk1   -1
2     5 yes spk1    0
3     5 yes spk2    1
4     5 yes spk2    0
5     5 yes spk3    0
6     5 yes spk3   -1
7     5 yes spk4   -1
8     5 yes spk4    1
9     5  no spk5    0
...

Hope somebody can help me.

with best regards,

Wolfgang

This is not reproducible. The last report of this type came about from an
incorrectly specified model (the Error model was rank-deficient), and
1.9.0 alpha gave an accurate diagnosis of the error.  So please

1) try your example in 1.9.0 alpha

2) if is still fails, supply a reproducible example (what is spaeVP and 
why is it sorted?) including what you are trying to do with a term like
Error(sub/(cs*spk)).

On Sat, 13 Mar 2004, Wolfgang Pauli wrote:
> Hi,
> 
> I have a problem with aov(). I used it many times, but now I have new data,
> tried to use it in the same way. I get I strange Error message that i
can't
> understand (see below). I guess it is caused by incompatible data types.
The
> dataframe also looks ok to me.
> 
> I use:
> spk
=factor(rep(c("spk1","spk2","spk3","spk4","spk5","spk6","spk7","spk8"),
> c(2,2,2,2,2,2,2,2)))
> cs = factor(rep(c("yes","no"),c(8,8)))
> sub = factor(sort(spaeVP))
> rati = stack(data.frame(arousal))
> rati = rati[,1]
> rating.df <-  data.frame(sub, cs, spk, rati)
> summary(aov(rati ~ cs*spk + Error(sub/(cs*spk)), data=rating.df))
> 
> I get this Error (after about 5sec):
> Error in "names<-.default"(`*tmp*`, value = nmstrata) : 
> 	names attribute must be the same length as the vector
> 
> > rating.df
>     sub  cs  spk rati
> 1     5 yes spk1   -1
> 2     5 yes spk1    0
> 3     5 yes spk2    1
> 4     5 yes spk2    0
> 5     5 yes spk3    0
> 6     5 yes spk3   -1
> 7     5 yes spk4   -1
> 8     5 yes spk4    1
> 9     5  no spk5    0
> ...
> 
> Hope somebody can help me.
> 
> with best regards,
> 
> Wolfgang
> 
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> 
> 
-- 
Brian D. Ripley,                  ripley at 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 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595