Re: [R] variable importance in Random Forest

2010-04-29 Thread Changbin Du
HI, Andy, Thanks so much for your reply! IN the paper "Classification and regression by randomForest", the first page, there is "the random forest estimate the the importance of a variable by looking at how much prediction error increase when the variable is permuted..." IN the help document of

[R] variable importance in Random Forest

2010-04-28 Thread Changbin Du
HI, Dear Andy, I run the RandomFOrest in R, and get the following resutls in variable importance: What is the meaning of MeanDecreaseAccuracy and MeanDecreaseGini? I found they are raw values, they are not scaled to 1, right? Which column if most similar to the variable rel.influence in Boosti