It is a 'List of 1', so you want tmp[[1]] which you can access as a
data frame. As the help file says
For a fit with a single stratum the result will be a list of
ANOVA tables, one for each response (even if there is only one
response): the tables are of class '"anova"' inheriting
from class
'"data.frame"'. They have columns
'"Df"', '"Sum Sq"', '"Mean
Sq"', as well as '"F value"' and
'"Pr(>F)"' if there are non-zero
residual degrees of freedom. There is a row for each term in the
model, plus one for '"Residuals"' if there are any.
and you have a single response so select the only element of the
list.
On Mon, 19 Oct 2009, Liviu Andronic wrote:
> Dear all
> How do I access individual elements of a "summary.aov" object?
>> data(iris)
>> AnovaModel.1 <- aov(Sepal.Length ~ Species, data=iris)
>> tmp <- summary(AnovaModel.1)
>> tmp
> Df Sum Sq Mean Sq F value Pr(>F)
> Species 2 63.2 31.6 119 <2e-16 ***
> Residuals 147 39.0 0.3
> ---
> Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05
'.' 0.1 ' ' 1
>> str(tmp)
> List of 1
> $ :Classes 'anova' and 'data.frame': 2 obs. of 5
variables:
> ..$ Df : num [1:2] 2 147
> ..$ Sum Sq : num [1:2] 63.2 39
> ..$ Mean Sq: num [1:2] 31.606 0.265
> ..$ F value: num [1:2] 119 NA
> ..$ Pr(>F) : num [1:2] 1.67e-31 NA
> - attr(*, "class")= chr [1:2] "summary.aov"
"listof"
>> tmp$1
> Error: unexpected numeric constant in "tmp$1"
>> tmp$"1"
> NULL
>> tmp$""
> NULL
>
> Thank you
> Liviu
>
>
>
>
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>
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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)
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