Re: [R] Measure of separation for survival data

. Which is what qnorm gives by default if you don't supply a mean and sd. Martyn -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Bonnett, Laura Sent: 23 November 2011 14:44 To: r-help@r-project.org Subject: [R] Measure of separat

[R] Measure of separation for survival data

Dear all, I am using R 2.9.2 on Windows XP. I am undertaking a simulation study to consider methods of external validation in the context of missing covariates in the validation data set. I would like to use Royston's measure of prognostic separation as a method of external validation. Alth