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Merge pull request #145 from pommedeterresautee/master

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refactoring
This commit is contained in:
Tianqi Chen 2015-01-18 14:57:44 -08:00
commit d50079f993
1 changed files with 2 additions and 2 deletions
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R-package/R/xgb.importance.R
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@ -72,8 +72,8 @@ xgb.importance <- function(feature_names = NULL, filename_dump = NULL, model = N
}
treeDump <- function(feature_names, text){
result <- xgb.model.dt.tree(feature_names = feature_names, text = text)[Feature!="Leaf",][,.(sum(Quality), sum(Cover), .N),by = Feature][,V1:=V1/sum(V1)][,V2:=V2/sum(V2)][,N:=N/sum(N)][order(-rank(V1))]
setnames(result, c("Feature", "Gain", "Cover", "Frequence"))
result <- xgb.model.dt.tree(feature_names = feature_names, text = text)[Feature!="Leaf",.(Gain = sum(Quality), Cover = sum(Cover), Frequence = .N), by = Feature][,`:=`(Gain=Gain/sum(Gain),Cover=Cover/sum(Cover),Frequence=Frequence/sum(Frequence))][order(-Gain)]
result
}