What works, amazingly, is summary(pb)$"Pr(>F)" [note the quotes]
Abhijit On Wed, 07 May 2008 18:17:09 -0700 "H. Paul Benton" <[EMAIL PROTECTED]> wrote: > Yea the anova object seems to be odd. It's not S4 so that's why I tried > originally the attr() funtion but.... > > summary(pb)$Pr(>F) > > Error: unexpected '>' in "summary(pb)$Pr(>" > > summary(pb)$Pr > > NULL > > summary(pb)@Pr(>F) > > Error: unexpected '>' in "summary(pb)@Pr(>" > > summary(pb)@Pr(F) > > Error: no slot of name "Pr" for this object of class "summary.aov" > In addition: Warning message: > trying to get slot "Pr" from an object (class "summary.aov") that is > not an S4 object > > > > Research Programmer & Technician > The Scripps Research Institute > Mass Spectrometry Core Facility > o The > / > o Scripps > \ > o Research > / > o Institute > > > > [EMAIL PROTECTED] wrote: > > Hi: it's probably the Pr(> F) element so just access it by > > > > sum<-summary(whatever). > > > > then sum$Pr(>F) will probably work. But make sure that's it because > > usually the name is pval or pvalue etc so I'm > > surprised about the weird name. > > > > > > > > > > On Wed, May 7, 2008 at 8:47 PM, Paul Benton wrote: > > > >> hello all, > >> > >> Quick question, how do I get the p value out of the anova? > >> > >> Thanks, > >> > >> Paul > >> > >>> pb<-aov(as.numeric(diff[5,16:33]) ~ grF) > >>> summary(pb) > >> Df Sum Sq Mean Sq F value Pr(>F) > >> grF 3 2.7860e+10 9.2867e+09 4.2236 0.02534 * > >> Residuals 14 3.0783e+10 2.1988e+09 > >> --- > >> Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1 > >>> str(summary(pb)) > >> List of 1 > >> $ :Classes 'anova' and 'data.frame': 2 obs. of 5 variables: > >> ..$ Df : num [1:2] 3 14 > >> ..$ Sum Sq : num [1:2] 2.79e+10 3.08e+10 > >> ..$ Mean Sq: num [1:2] 9.29e+09 2.20e+09 > >> ..$ F value: num [1:2] 4.22 NA > >> ..$ Pr(>F) : num [1:2] 0.0253 NA > >> - attr(*, "class")= chr [1:2] "summary.aov" "listof" > >>> attr(summary(pb), "Pr(>F)") > >> NULL > >> > >> ______________________________________________ > >> 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. > > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. -- Abhijit Dasgupta ______________________________________________ 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.
