search for: cascsc

...several columns of data (19 loci) for each species. I want to do a Mann-Whitney U-test or the wilcox.test (two sample Wilcoxon). When I try to run my code (the first two columns are 1:name of the species, 2:name of individual) I get the error message: "Error in wilcox.test.default(CaScSc, CaScCo, alternative = " two.sided", : 'x' must be numeric" I do have several NAs in the data which is all I can figure that is non-numeric. Any suggestions as to the problem? Is it a problem with having several columns/sets of info for each individual? Thanks for...