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Milton Cezar Ribeiro wrote:> Hi R-friends > > I don?t know why the "min()" function below return the min value as factor. When i force the aicc.min using a as.numeric() function, it return a factor index (1,2,..) and not min value as I want. By the way, I included a sessionInfo() at the end of this e-mail. >min() is not doing anything out of the ordinary, but cbind'ing it with the character vector sp coerces it to character and rbind'ing to a data frame turns character vectors into factors... The whole thing looks like it could be a straightforward application of aggregate().> > In fact I had the same problem (values as factor) on other part of my script and I noticed that it occour when I use "cbind()". It is real? > > Any idea? > > Kind regards, > > Miltinho > > > especies.aicc.min<-data.frame() > >> for (sp in levels(especies.aicc$especie)) >> > + { > + sele<-subset(especies.aicc,especie==sp) > + especies.aicc.min<-rbind(especies.aicc.min,cbind(sp,aicc.min=min(sele$aicc))) > + } > >> especies.aicc.min >> > sp aicc.min > 1 Attila.rufus 6.7387056413613 > 2 Automolus.leucophthalmus 125.791300522824 > >> class(especies.aicc.min$aicc.min) >> > [1] "factor" > > ----------- > > sessionInfo() > R version 2.4.0 (2006-10-03) > i386-pc-mingw32 > locale: > LC_COLLATE=English_Jamaica.1252;LC_CTYPE=English_Jamaica.1252;LC_MONETARY=English_Jamaica.1252;LC_NUMERIC=C;LC_TIME=English_Jamaica.1252 > attached base packages: > [1] "methods" "stats" "graphics" "grDevices" "utils" "datasets" "base" > > >-- O__ ---- Peter Dalgaard ?ster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
Hi Milton! I don't know why, but this thing happend with me too, quite a lot times. It's a useful way that convert the value type like that: *as.numeric(as.character(min(...)))* Zoltan 2007/1/9, Milton Cezar Ribeiro <milton_ruser@yahoo.com.br>:> > Hi R-friends > > I don´t know why the "min()" function below return the min value as > factor. When i force the aicc.min using a as.numeric() function, it return > a factor index (1,2,..) and not min value as I want. By the way, I included > a sessionInfo() at the end of this e-mail. > > In fact I had the same problem (values as factor) on other part of my > script and I noticed that it occour when I use "cbind()". It is real? > > Any idea? > > Kind regards, > > Miltinho > > > especies.aicc.min<-data.frame() > > for (sp in levels(especies.aicc$especie)) > + { > + sele<-subset(especies.aicc,especie==sp) > + especies.aicc.min<-rbind(especies.aicc.min,cbind(sp,aicc.min=min > (sele$aicc))) > + } > > especies.aicc.min > sp aicc.min > 1 Attila.rufus 6.7387056413613 > 2 Automolus.leucophthalmus 125.791300522824 > > class(especies.aicc.min$aicc.min) > [1] "factor" > > > ----------- > > sessionInfo() > R version 2.4.0 (2006-10-03) > i386-pc-mingw32 > locale: > > LC_COLLATE=English_Jamaica.1252;LC_CTYPE=English_Jamaica.1252;LC_MONETARY=English_Jamaica.1252;LC_NUMERIC=C;LC_TIME=English_Jamaica.1252 > attached base packages: > [1] "methods" "stats" "graphics" "grDevices" "utils" > "datasets" "base" > > > > > __________________________________________________ > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > R-help@stat.math.ethz.ch 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]]