It looks from str(SA) that Response IPS1 is a data.frame of class "anova", which probably cannot be coerced to vector.
Maybe you can use unlist() instead of as.vector() Or something like SA[["Response IPS1"]]["as.factor(WSD)",] ## to select the first row only, even maybe with unlist() Without a better REPRODUCIBLE example, I cannot tell more (maybe some others can, that's why I reply to the list) HTH, Ivan Le 4 mai 2011 à 20:17, reith_will...@bah.com a écrit : > I am still waiting for this to get posted so I thought I would email it to > you. > > SA gives the output: > > Response IPS1 : > Df Sum Sq Mean Sq F value Pr(>F) > as.factor(WSD) 3 3.3136 1.10455 23.047 5.19e-12 *** > Residuals 129 6.1823 0.04793 > --- > Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 > . > . > . > There are 11 more just like this output. Just increment IPS1 to IPS2, etc. > > > Goal: save "3 3.3136 1.10455 23.047 5.19e-12" as a vector. > > > Str(SA) gives the output: > > str(SA) >> str(SA) > List of 12 > " $ Response IPS1 :Classes 'anova' and 'data.frame': 2 obs. of 5 > variables:" > ..$ Df : num [1:2] 3 129 > ..$ Sum Sq : num [1:2] 3.31 6.18 > ..$ Mean Sq: num [1:2] 1.1045 0.0479 > ..$ F value: num [1:2] 23 NA > ..$ Pr(>F) : num [1:2] 5.19e-12 NA > > > There are several more but they are just repeats of this one only with IPS2, > IPS3,... > > The command: > >> SA1<-as.vector(SA$"Reponse IPS1") > > Returns > >> NULL > > As do several variations I have tried. Any ideas. -- Ivan CALANDRA PhD Student University of Hamburg Biozentrum Grindel und Zoologisches Institut und Museum Abt. Säugetiere Martin-Luther-King-Platz 3 D-20146 Hamburg, GERMANY +49(0)40 42838 6231 ivan.calan...@uni-hamburg.de ********** http://www.for771.uni-bonn.de http://webapp5.rrz.uni-hamburg.de/mammals/eng/1525_8_1.php ______________________________________________ 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.