[R] Save P values calculated with anova

ONKELINX, Thierry Thierry.ONKELINX at inbo.be
Mon Nov 4 16:13:06 CET 2013

You'll need to add quotes


Or use the bracket notation

MyAnova[, "Pr(>F)"]

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
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Thierry.Onkelinx op inbo.be

To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of.
~ Sir Ronald Aylmer Fisher

The plural of anecdote is not data.
~ Roger Brinner

The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data.
~ John Tukey

-----Oorspronkelijk bericht-----
Van: r-help-bounces op r-project.org [mailto:r-help-bounces op r-project.org] Namens Anders Tisell
Verzonden: maandag 4 november 2013 15:11
Aan: r-help op r-project.org
Onderwerp: [R] Save P values calculated with anova


I have created a mixed linear model with one fixed factor and two random factors then I would like to test if there is a significant difference between the two groups.

To do this I calculate the model with the lmer function:

> MyModel <- lmer(...)

and do a anova of the model to estimate if the F value is significant.

> MyAnova <- anova(MyModel)

And I get a summary table of the anova with F values, Pr(>F) when i try to extract this values using the $ function:

> MyAnova$Pr(>F)

I get the error message:

Error: unexpected symbol '>' in "MyAnova$Pr(>

I also get this message if I try to extract F value, Mean Sq etc But not for DF, Denom etc, so I guess it is the white space and > characters that is the problem. What should I do to get the P values so I can write them in to a file?

I am using R 3.0.2 GUI 1.62 Snow Lepard build (6558) on a Mac Mini OS X 10.9

Best regards

Sent from Anders iPad

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