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.
