Hi R-friends I donĀ“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" >
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