On Thu, 17 May 2012, ofraam wrote:
Hi All,I'm using the party package to grow conditional inference trees for survival analysis. When I used party version party_0.9-9991 everything worked well, but when I update to party_1.0-2 (due to using 64bit R), I get an error. For simplicity I will show the error I get for the example in the party documentation: ### survival analysis if (require("ipred")) { data("GBSG2", package = "ipred") GBSG2ct <- ctree(Surv(time, cens) ~ .,data = GBSG2) plot(GBSG2ct) treeresponse(GBSG2ct, newdata = GBSG2[1:2,]) }
Works for me without a problem.
for the plot(GBSG2ct) line I get the following error: Error in Summary.Surv(c(1814, 2018, 712, 1807, 772, 448, 2172, 2161, 471, : Invalid operation on a survival time and for treeresponse(GBSG2ct, newdata = GBSG2[1:2,]) I get this error: Error: extends(class(y), "Surv") is not TRUE (I care more about treeresponse but assume it is related).
My guess is that you have loaded package "rms" but haven't told us so. This overwrites Surv() in a way that is incompatible with the usage in ctree().
Best, Z
Any help would be highly appreciated! Thanks, Ofra -- View this message in context: http://r.789695.n4.nabble.com/ctree-for-suvival-analysis-problem-tp4630362.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@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.
______________________________________________ R-help@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.
