Using caret on the Titanic data from Kaggle, I tried various models, including rfRules which produces a model, partly described as such:
> caret.rfRules.cv$finalModel $model len freq err [1,] "2" "0.0368" "0" [2,] "2" "0.032" "0.05" [3,] "2" "0.1824" "0.0526315789473685" [4,] "4" "0.0656" "0.0975609756097561" [5,] "4" "0.0304" "0.105263157894737" [6,] "3" "0.4384" "0.105839416058394" [7,] "3" "0.0112" "0.142857142857143" [8,] "4" "0.0256" "0.1875" [9,] "3" "0.1088" "0.279411764705882" [10,] "3" "0.056" "0.342857142857143" [11,] "1" "0.0128" "0.25" condition pred [1,] "X[,4]<=7 & X[,11]<=4.5" "1" [2,] "X[,7]<=31.33125 & X[,11]>4.5" "0" [3,] "X[,2]<=0.5 & X[,3]<=0.5" "1" [4,] "X[,2]>0.5 & X[,4]<=30.5 & X[,5]>0.5 & X[,9]>0.5" "0" [5,] "X[,3]<=0.5 & X[,4]<=30.2031919426199 & X[,4]>21.5 & X[,9]<=0.5" "1" [6,] "X[,3]>0.5 & X[,4]>9.5 & X[,7]<=26.26875" "0" [7,] "X[,2]>0.5 & X[,7]>13.90835 & X[,7]<=15.3729" "0" [8,] "X[,4]<=40.8653667208804 & X[,4]>25 & X[,7]>26.14375 & X[,11]<=1.5" "1" [9,] "X[,3]>0.5 & X[,4]>8.16718191075288 & X[,4]<=77" "0" [10,] "X[,3]<=0.5 & X[,4]<=38.5 & X[,4]>12.5" "1" [11,] "X[,1]==X[,1]" "0" [...] Does that 11th row make sense? X[,1]==X[,1] will always be true, so is that saying anything? Or is it a case of a model for prediction being useless for inference? > version _ platform x86_64-pc-linux-gnu arch x86_64 os linux-gnu system x86_64, linux-gnu status major 3 minor 4.1 year 2017 month 06 day 30 svn rev 72865 language R version.string R version 3.4.1 (2017-06-30) nickname Single Candle -- ~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~. ___ Patrick Connolly {~._.~} Great minds discuss ideas _( Y )_ Average minds discuss events (:_~*~_:) Small minds discuss people (_)-(_) ..... Eleanor Roosevelt ~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.