What's the meaning of "0 split" for Surrogate splits?

bethatkinson / rpart

Recursive Partitioning and Regression Trees

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What's the meaning of "0 split" for Surrogate splits? #55

Open A-Pai opened 7 months ago

A-Pai commented 7 months ago

library(rpart) progstat <- factor(stagec$pgstat, levels = 0:1, labels = c("No", "Prog")) cfit <- rpart(progstat ~ age + eet + g2 + grade + gleason + ploidy,data = stagec, method = 'class') summary(cfit, cp = 0.06)