[R] Save P values calculated with anova
Hi, 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 /Anders Sent from Anders iPad __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Save P values calculated with anova
You'll need to add quotes MyAnova$Pr(F) 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 Belgium + 32 2 525 02 51 + 32 54 43 61 85 thierry.onkel...@inbo.be www.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-boun...@r-project.org [mailto:r-help-boun...@r-project.org] Namens Anders Tisell Verzonden: maandag 4 november 2013 15:11 Aan: r-help@r-project.org Onderwerp: [R] Save P values calculated with anova Hi, 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 /Anders Sent from Anders iPad __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. * * * * * * * * * * * * * D I S C L A I M E R * * * * * * * * * * * * * Dit bericht en eventuele bijlagen geven enkel de visie van de schrijver weer en binden het INBO onder geen enkel beding, zolang dit bericht niet bevestigd is door een geldig ondertekend document. The views expressed in this message and any annex are purely those of the writer and may not be regarded as stating an official position of INBO, as long as the message is not confirmed by a duly signed document. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Save P values calculated with anova
That would be: MyAnova$Pr(F) and since that is an Anova table, you actually only need the first value: MyAnova$Pr(F)[1] Hope this helps, Adrian On Mon, Nov 4, 2013 at 4:10 PM, Anders Tisell anders.tis...@liu.se wrote: Hi, 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 /Anders Sent from Anders iPad __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Adrian Dusa University of Bucharest Romanian Social Data Archive 1, Schitu Magureanu Bd. 050025 Bucharest sector 5 Romania Tel.:+40 21 3126618 \ +40 21 3120210 / int.101 Fax: +40 21 3158391 __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
