search for: mseimport

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2013 May 17
2
Selecting A List of Columns
...election of the most important variables from a random forest then I find myself stuck. The example below demonstrates the problem. library(randomForest) data(mtcars) mtcars.rf <- randomForest(mpg ~ ., data=mtcars,importance=TRUE) Importance<-data.frame(mtcars.rf$importance) Importance MSEImportance<-head(Importance[order(Importance$X.IncMSE, decreasing=TRUE),],3) MSEVars<-row.names(MSEImportance) MSEVars<-data.frame(MSEVars,stringsAsFactors = FALSE) colnames(MSEVars)<-"Vars" NodeImportance<-head(Importance[order(Importance$IncNodePurity,decreasing=TRUE),], 3) Nod...