Hi, I get a warning message when I plot cox.zph objects with the transform km and rank, but not with id and log with the same data set. Here's the command:
example is a coxph object rk <- cox.zph(example, transform='rank') rk plot(rk) and here's the warning message: Warning messages: 1: suppression des ex-aequos de 'x' in: approx(xx, xtime, seq(min(xx), max(xx), length = 17)[2 * (1:8)]) 2: suppression des ex-aequos de 'x' in: approx(xtime, xx, temp) However, no points are actually missing on my plots. Is anybody get an idea of why this happens only with km and rank transforms and what does this mean? Thank you, Kathy ------------------------------------------------- Courriel expédié via https://courriel.uqtr.ca ______________________________________________ R-help@stat.math.ethz.ch 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.
