search for: concorance

...can be transferred to Harrell's c index. But in this way, I cannot get 95%CI of c index. How can I do this in R? And by the way, what value should be in c index to present the model's well? Calibration was using calibrate() in rms, but I cannot get the calibration plot which presented the concorance of predicted and observed events in Cox model. How can I do this calibration plot of Cox model in R. -- View this message in context: http://r.789695.n4.nabble.com/Discrimination-and-calibration-of-Cox-model-tp4367927p4367927.html Sent from the R help mailing list archive at Nabble.com.

Hi folks, Here is the problem. I am giving an example .I want to find a measure of similarity or dissimilarity among ranking (of students of a same class of size say 50)by two judges. But instead of observing the rank of all the 50 students (Where we could have used rank correlation measures)in each case what I have is 2 list of top 20 students chosen by each judge. The following paper gives out

Hi All Please see the Rprofile file which i have modified as follows and after that when I start R then I see that R says to me "TRUE" for all the packages implying that all loaded at once. But when i try to use commands as simple as help("lm"), it doesnt work nor any of the menu "Packages" is not working. Although the regression using lm ( Y ~ X ) is working