[R] random forest mtry and mse
rogowski at email.arizona.edu
Fri Oct 12 01:23:06 CEST 2007
I have been using random forest on a data set with 226 sites and 36
explanatory variables (continuous and categorical). When I use
"tune.randomforest" to determine the best value to use in "mtry" there
is a fairly consistent and steady decrease in MSE, with the optimum of
"mtry" usually equal to 1. Why would that occur, and what does it
signify? What I would assume is that most of my explanatory variables
have little to no explanatory power. Does that sound about right?
Thanks for any insight that anyone may have.
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