permtests {clinfun} | R Documentation |
Small sample tests using the permutation reference distributions.
permlogrank(formula, data, subset, na.action, rho=0, nperm=5000) jonckheere.test(x, g, alternative = c("two.sided", "increasing", "decreasing"))
nperm |
number of permutations for the reference distribution |
formula, data, subset, na.action, rho |
see survdiff for details |
x, g |
data and group vector |
alternative |
means are monotonic (two.sided), increasing, or decreasing |
permlogrank is the permutation version of k-sample survdiff
jonckheere.test is the exact (permutation) version of the Jonckheere-Terpstra test. The asymptotic version is equivalent to cor.test(x, g, method="k").