Hi, company,

I am using package survivalROC to plot roc curv. But when I calculate true-positive and false-positive with function survivalROC, I get an error ,

Here are my analyzing code:

survivalROC(Stime = HR_ICGC_e_sample$time,
                      status = HR_ICGC_e_sample$status,
                      marker = HR_ICGC_e_sample$HR,
                      predict.time = 12,
                      span = 0.25*nobs_icgc^(-0.20))

and the reported error:

Error in if (n > 0) s0 <- s0 * (1 - d/n) : 
      missing value where TRUE/FALSE needed

Another, the same codes run well for any other groups of data. And I have checked, there aren't any NAs in this analysised data HR_ICGC_e_sample . I didn't find anything useful information aim to this error about survivalROC. Maybe there are somebody could help me? Any information would be appreciated.

Thanks in advance!