Displaying 2 results from an estimated 2 matches for "age_at_death".
2004 Sep 03
1
Printing output on Plot
...es
from the CPH test to appear but if this can't be done I am willing to
have the entire CPH output.
This is what I am currently trying: (it doesn't print the CPH output)
plot_KM <- function(field)
{
library(survival)
y = length(levels(factor(field)))
field.KM <- survfit(Surv(age_at_death,death)~field)
field.CPH <- coxph(Surv(age_at_death,death)~factor(field))
plot(field.KM,mark.time=FALSE,col=2:
(y+1),lty=1,main=paste(as.character(substitute(field))," Kaplan-Meier
Plot"))
text(1000, .3, paste(as.character(field.CPH)), col="red")
legend(1000, .5, levels...
2004 Oct 16
3
Cox PH Warning Message
Hi,
Can anybody tell me what the message below means and how to overcome it.
Thanks,
Neil
Warning message:
X matrix deemed to be singular; variable 2 in: coxph(Surv(age_at_death,
death) ~ project$pluralgp + project$yrborn + .........
>