rpart

rpart copied to clipboard

what is the cost sensitive algorithm？ https://www.rdocumentation.org/packages/rpart/versions/4.1.19/topics/rpart 

A-Pai

The 'xerror' is related to the PRESS statistic [https://cran.r-project.org/web/packages/rpart/vignettes/longintro.pdf](p 34).  The PRESS is achivied by `apply(xerr, 2, sum)` . It is obvious that PRESS of...

gsnrguo

How is the 'variable.importance' calculated in the rpart package?

2

In xgboost, there are several importance types, including weight’, ‘gain’, ‘cover’, ‘total_gain’, and ‘total_cover’. I wonder how rpart calculates importance score.

statwangz

Are `weights` used during cross-validation?

2

Hello there! Thanks for this very nice package. I know similar questions have been asked multiple times, but I was not able to get a 100% clear answers from what...

vgherard

using maxdepth (or other setting) to force tree to grow to that size

2

Hello, I am trying to grow a tree to a maxdepth of 12. I used the rpart.control (maxdepth=12) option, but the tree only grows up to 6 and then stops....

jmq06

why there is “surrogate” when no missing value？

1

library(mice) library(rpart) md.pattern(iris) #Missing value survey mytree

A-Pai

what is the Meaning of Surrogate Split?

6

tmp_df

A-Pai

Hi, I am fitting survival trees with rpart but I have some doubts concerning the resulting outcome. I understood that the node outcome (yval) should be a measure of relative...

ambramacis

what is the meaning of the return items of summay in rpart

2

library(rpart) fit

A-Pai

what is the meaning of "1SE above the minimum of the curve"?

5

https://stat.ethz.ch/R-manual/R-devel/library/rpart/html/plotcp.htm  l

A-Pai