Hello, I am having hard time obtaining a value from a function. "fit" is a survival function that produces some results, such as "median", "confidence intervals" etc. But str() function does not list these values. How can I extract these to be able use them? For example, I need "median" value for the group DrugA which is 48. "Print" function does not reveal them either.
Thank you. > fit Call: survfit(formula = Surv(tT, dT) ~ gT, conf.type = "log-log") records n.max n.start events median 0.95LCL 0.95UCL gT=DrugA 9 9 9 6 48 32 NA gT=DrugB 9 9 9 3 NA 42 NA gT=DrugC 9 9 9 4 NA 42 NA gT=Vehicle 9 9 9 8 40 37 45 > str(fit) List of 14 $ n : int [1:4] 9 9 9 9 $ time : num [1:28] 32 43 45 46 48 54 55 60 62 42 ... $ n.risk : num [1:28] 9 8 7 6 5 4 3 2 1 9 ... $ n.event : num [1:28] 1 1 1 1 1 0 1 0 0 2 ... $ n.censor : num [1:28] 0 0 0 0 0 1 0 1 1 0 ... $ surv : num [1:28] 0.889 0.778 0.667 0.556 0.444 ... $ type : chr "right" $ strata : Named int [1:4] 9 6 6 7 ..- attr(*, "names")= chr [1:4] "gT=DrugA" "gT=DrugB" "gT=DrugC" "gT=Vehicle" $ std.err : num [1:28] 0.118 0.178 0.236 0.298 0.373 ... $ upper : num [1:28] 0.984 0.939 0.878 0.805 0.719 ... $ lower : num [1:28] 0.433 0.365 0.282 0.204 0.136 ... $ conf.type: chr "log-log" $ conf.int : num 0.95 $ call : language survfit(formula = Surv(tT, dT) ~ gT, conf.type = "log-log") - attr(*, "class")= chr "survfit" Cem Cem Girit, PhD Biopticon Corporation 182 Nassau Street, Suite 204 Princeton, NJ 08542 Tel: (609)-853-0231 Email: <mailto:cgi...@biopticon.com> gi...@biopticon.com This email message and any attachments are confidential ...{{dropped:14}} ______________________________________________ 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.
