Hi, MM recommended to send this to R-devel: As far as I know, the only method to compute Kendall's tau is to perform cor.test with method="kendall". I suggest that 1) this should be easier to find, namely with help.search("kendall") and/or link from cor, 2) cor should be given a method parameter like cor.test so that Kendall and Spearman correlations can be computed without doing the test. Best, Christian -- *********************************************************************** Christian Hennig Seminar fuer Statistik, ETH-Zentrum (LEO), CH-8092 Zuerich (currently) and Fachbereich Mathematik-SPST/ZMS, Universitaet Hamburg hennig@stat.math.ethz.ch, http://stat.ethz.ch/~hennig/ hennig@math.uni-hamburg.de, http://www.math.uni-hamburg.de/home/hennig/ ####################################################################### ich empfehle www.boag.de