Currently I am using rfe function in the "caret" package to do feature selection. There are 380 variables as input candidates. I have done many trials and I noticed that something weird always happens, as the rfe tends to output all candidate variables as the best subset while I have set the parameter size to be 5 to 10.
I am wondering whether anyone else has come across this problem. Any help will be appreciated. Thanks in advance for any help.