I have use the plot(summary(cph-fit)) to plot the hazard ratio plot. *Can I change the reference level in the plot, for example, use [1999, 2002) as the reference level?*
*Thanks* *Yao Zhu* *Department of Urology Fudan University Shanghai Cancer CenterShanghai, China* [[alternative HTML version deleted]] ______________________________________________ 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.