which of the following is an error in rcorr what is the error message rcorr.cens how do you compute c index in r what is error in rcorr.cens(x = estimates s = survmod): y must have same length as x? what is the error message for cross validation of a cox model cross validation in r how to use the c index cross validation of cox regression what is error in rcorr.cens what is the difference rcorr.cens and c index how to cross validate cox ph models does x have same length as y can you use c index and c-index in the same set why is the c index in training set used error in rcorr.cens(x = estimates, x = survmod): y must have same length as x how to cross validate a cox model why should rcorr be equal to c index why would r corr use the same test set and training set cross validation of cox regression model rcorr error how to compute c index using cross validation in r