is your survdiff object, the p-value can be computed as follows:
p.val <- 1 - pchisq(sdf$chisq, length(sdf$n) - 1)
and then use it in your K-M plot.
Christos Hatzis, Ph.D.
Nuvera Biosciences, Inc.
400 West Cummings Park
Woburn, MA 01801
> -----Original Message-----
> From: [hidden email] > [mailto:[hidden email]] On Behalf Of Armin Goralczyk
> Sent: Thursday, April 26, 2007 3:03 PM
> To: [hidden email] > Subject: [R] Extract p-value from survdiff function
> Hi list,
> I want to use the p-value from the survdiff function (package
> survival) to reuse within a function in a Kaplan-Meier plot.
> The p-value is somehow not a component of the value list ?!
> Thanks in advance
> A. Goralczyk
> Göttingen, Ger.
> [hidden email] 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.
might help in quite a common case. Generally you'll have to look at the
printing function and make a modified copy to save the p-value:
Armin Goralczyk napsal(a):
> Hi list,I want to use the p-value from the survdiff function (packagesurvival) to reuse within a function in a Kaplan-Meier plot. Thep-value is somehow not a component of the value list ?!
> Thanks in advance-- A. GoralczykGöttingen, Ger.
> [hidden email] mailing listhttps://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide http://www.R-project.org/posting-guide.htmland provide commented, minimal, self-contained, reproducible code.
Dept. of Probability and Statistics
Charles University in Prague