Hi, How do I get what splits were used for the top important variables. For example, if my top most important variable is a continuous variable, e.g. previous 12 month sales, and its range is between $0 to $1M, how do I find what what were the split values for this variable that were used in the random forests algorithm? How do I achieve the same thing for a factor variable? Thank you, Nagu
Variable importance in Random Forests
2 messages · Nagu, Liaw, Andy
Depending on the way you ran randomForest, the variable of interest may have been used in many splits in many trees. The information can be extracted using the getTree() function. However, I suspect it might be more useful to look at partialPlot(). Best, Andy
-----Original Message----- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Nagu Sent: Wednesday, March 05, 2008 6:31 PM To: r-help at r-project.org; r-help at stat.math.ethz.ch Subject: [R] Variable importance in Random Forests Hi, How do I get what splits were used for the top important variables. For example, if my top most important variable is a continuous variable, e.g. previous 12 month sales, and its range is between $0 to $1M, how do I find what what were the split values for this variable that were used in the random forests algorithm? How do I achieve the same thing for a factor variable? Thank you, Nagu
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