ctree and survival problem
On Thu, 28 Apr 2011, moleps wrote:
sessionInfo yields the following:
OK, the "Design" package causes the problem here. When you load the Design package, it provides a new Surv() and related methods. This clashes with the computations of ctree() based on Surv(). So it's better not to load both packages simultaneously... Z
sessionInfo()
R version 2.11.1 (2010-05-31) x86_64-apple-darwin9.8.0 locale: [1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] stats4 tcltk splines grid stats graphics grDevices utils datasets methods base other attached packages: [1] ipred_0.8-8 class_7.3-3 mlbench_2.1-0 rpart_3.1-46 party_0.9-99991 vcd_1.2-9 colorspace_1.0-1 strucchange_1.4-3 coin_1.0-18 mvtnorm_0.9-95 [11] modeltools_0.2-17 Design_2.3-0 car_2.0-8 nnet_7.3-1 sandwich_2.2-6 boot_1.2-43 Amelia_1.2-18 lmtest_0.9-27 zoo_1.6-4 MASS_7.3-7 [21] mgcv_1.7-2 cem_1.0.142 randomForest_4.6-2 lattice_0.19-17 nlme_3.1-97 rgl_0.92.798 Hmisc_3.8-3 survival_2.36-2 ggplot2_0.8.9 proto_0.3-8 [31] reshape_0.8.3 plyr_1.4 foreign_0.8-41 loaded via a namespace (and not attached): [1] cluster_1.13.2 digest_0.4.2 Matrix_0.999375-46 tools_2.11.1 As i described in the original post I ran
example(ctree)
and the following part yields an error:
if (require("ipred")) {
data("GBSG2", package = "ipred")
GBSG2ct <- ctree(Surv(time, cens) ~ .,data = GBSG2)
plot(GBSG2ct)
treeresponse(GBSG2ct, newdata = GBSG2[1:2,])
}
Error in Summary.Surv(c(1814, 2018, 712, 1807, 772, 448, 2172, 2161, 471, :
Invalid operation on a survival time
//M
On 28. apr. 2011, at 14.19, Jonathan Daily wrote:
It would help people who know more about R's guts than me if you posted your sessionInfo() output and exactly what commands produced your error. It is also recommended that you try simply upgrading R to the latest version and see if you get an error with the latest version of 'party'. My guess is that the error will go away. On Wed, Apr 27, 2011 at 3:40 PM, moleps <moleps2 at gmail.com> wrote:
Forgot to mention that the ctree command is from the party library. //M
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______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.