Full_Name: Paul Li Version: 1.6.2 OS: Windows NT Submission from: (NULL) (128.2.203.251) The $size does not start with the models with only one variable, it starts with 2, ie, instead of 1 2 3... it starts with 2 3 4... This isn't that big of a deal cept that everything else, like $which and $Cp start with 1. Minor detail, I apologize for nit picking. $which 1 2 3 4 5 6 7 8 9 A B C D 1 FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE 1 FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE 1 FALSE FALSE FALSE FALSE FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE 2 TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE 2 FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE 2 FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE 3 TRUE FALSE FALSE TRUE FALSE FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE ... $label [1] "(Intercept)" "1" "2" "3" "4" [6] "5" "6" "7" "8" "9" [11] "A" "B" "C" "D" $size [1] 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 7 7 8 8 8 9 9 9 10 10 10 [28] 11 11 11 12 12 12 13 13 13 14 $Cp [1] 10.3556013 20.9834809 36.1314911 3.3146028 5.3535009 6.8232717 0.2356971 [8]