Dear Professor Harrell: Thank you so much for your excellent advice. I just installed the proper version of Hmisc, which works perfectly. Hmisc yields Harrell's C (rcorr.cens); all one need do is calculate the expected value for the risk for each patient and make that the X variable. You are a wonderful influence on all who perform statistics.
With kindest regards. Mitchell S. Wachtel, MD -----Original Message----- From: Frank E Harrell Jr [mailto:[EMAIL PROTECTED] Sent: Saturday, June 02, 2007 5:01 PM To: Wachtel, Mitchell Cc: [email protected]; Thomas Dupont Subject: Re: [R] Harrell's C Wachtel, Mitchell wrote: > R will not let me load Design or Hmisc anymore. I need to calculate Harrell's C for some survival analyses. Can anyone provide an R formula for Harrell's C? > With kindest regards. > Mitchell Wachtel, MD You provided very little information. We have had no reports of Hmisc not loading under Windows but Design is not currently available for Windows for R 2.5. We are working to fix that. Frank -- Frank E Harrell Jr Professor and Chair School of Medicine Department of Biostatistics Vanderbilt University ______________________________________________ [email protected] 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.
