| rcorrp.cens {Hmisc} | R Documentation |
Computes U-statistics to test for whether predictor X1 is more concordant than predictor X2, extending rcorr.cens. For method=1, estimates the fraction of pairs for which the x1 difference is more impressive than the x2 difference. For method=2, estimates the fraction of pairs for which x1 is concordant with S but x2 is not.
rcorrp.cens(x1, x2, S, outx=FALSE, method=1)
x1 |
first predictor |
x2 |
second predictor |
S |
a possibly right-censored Surv object. If S is a vector instead,
it is converted to a Surv object and it is assumed that no observations
are censored.
|
outx |
set to T to exclude pairs tied on x1 or x2 from consideration |
method |
see above |
a vector of statistics
Frank Harrell
Department of Biostatistics, Vanderbilt University
f.harrell@vanderbilt.edu
set.seed(1) if(.R.) library(survival) x1 <- rnorm(400) x2 <- x1 + rnorm(400) d.time <- rexp(400) + (x1 - min(x1)) cens <- runif(400,.5,2) death <- d.time <= cens d.time <- pmin(d.time, cens) rcorrp.cens(x1, x2, Surv(d.time, death)) # rcorrp.cens(x1, x2, y) ## no censoring