51 lines
1.6 KiB
Plaintext
51 lines
1.6 KiB
Plaintext
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R Under development (unstable) (2019-04-05 r76323) -- "Unsuffered Consequences"
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Copyright (C) 2019 The R Foundation for Statistical Computing
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Platform: x86_64-pc-linux-gnu (64-bit)
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R is free software and comes with ABSOLUTELY NO WARRANTY.
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You are welcome to redistribute it under certain conditions.
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Type 'license()' or 'licence()' for distribution details.
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R is a collaborative project with many contributors.
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Type 'contributors()' for more information and
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'citation()' on how to cite R or R packages in publications.
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Type 'demo()' for some demos, 'help()' for on-line help, or
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'help.start()' for an HTML browser interface to help.
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Type 'q()' to quit R.
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> library(rpart)
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> require(survival)
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Loading required package: survival
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> aeq <- function(x,y, ...) all.equal(as.vector(x), as.vector(y), ...)
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>
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> set.seed(10)
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> #
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> # Check out using costs
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> #
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> fit1 <- rpart(Surv(time, status) ~ age + sex + ph.ecog + ph.karno + pat.karno
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+ + meal.cal + wt.loss, data=lung,
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+ maxdepth=1, maxcompete=6, xval=0)
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>
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> fit2 <- rpart(Surv(time, status) ~ age + sex + ph.ecog + ph.karno + pat.karno
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+ + meal.cal + wt.loss, data=lung,
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+ maxdepth=1, maxcompete=6, xval=0, cost=(1+ 1:7/10))
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>
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> temp1 <- fit1$splits[1:7,]
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> temp2 <- fit2$splits[1:7,]
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> temp3 <- c('age', 'sex', 'ph.ecog', 'ph.karno', 'pat.karno', 'meal.cal',
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+ 'wt.loss')
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> indx1 <- match(temp3, dimnames(temp1)[[1]])
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> indx2 <- match(temp3, dimnames(temp2)[[1]])
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> aeq(temp1[indx1,1], temp2[indx2,1]) #same n's ?
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[1] TRUE
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> aeq(temp1[indx1,3], temp2[indx2,3]*(1+ 1:7/10)) #scaled importance
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[1] TRUE
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>
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>
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>
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> proc.time()
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user system elapsed
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0.693 0.051 0.738
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