Hi, The following error looks like a bug to me but perhaps someone can shed light on it:
> library(splines) > library(survival) > s <- survreg(Surv(futime, fustat) ~ ns(age, knots=c(50, 60)), data=ovarian) > n <- data.frame(age=rep(mean(ovarian$age), 10)) > predict(s, newdata=n) Error in qr.default(t(const)) : NA/NaN/Inf in foreign function call (arg 1) Thanks, Gad > sessionInfo() R version 2.6.1 (2007-11-26) i486-pc-linux-gnu locale: LC_CTYPE=en_AU.UTF-8;LC_NUMERIC=C;LC_TIME=en_AU.UTF-8; LC_COLLATE=en_AU.UTF-8;LC_MONETARY=en_AU.UTF-8;LC_MESSAGES=en_AU.UTF-8; LC_PAPER=en_AU.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C; LC_MEASUREMENT=en_AU.UTF-8;LC_IDENTIFICATION=C attached base packages: [1] splines stats graphics grDevices utils datasets methods [8] base other attached packages: [1] survival_2.34 loaded via a namespace (and not attached): [1] rcompgen_0.1-17 -- Gad Abraham Department of Mathematics and Statistics The University of Melbourne Parkville 3010, Victoria, Australia email: [EMAIL PROTECTED] web: http://www.ms.unimelb.edu.au/~gabraham ______________________________________________ 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.
