Hello, I'm trying to compare the allozyme data from two taxa. I have 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 any help anyone can give (I've also used Arlequin and GDA but want non-parametric tests) Michelle DePrenger-Levin My code is: scirconv2 = read.csv("CaScSc070420_2.csv", na.strings="?") CaScSc = scirconv2[1:250,3:21] CaScCo = scirconv2[251:475,3:21] ScCoMWU = wilcox.test(CaScSc, CaScCo, alternative = "two.sided", mu = 0.5, paired = FALSE, exact = NULL, correct = TRUE, conf.int = TRUE, conf.level = 0.95) some of the data: ADH TPI1 TPI2 SOD DIA1 MNR1DIA2 MNR2DIA3 ME AAT1 AAT2 G3PDH SDH SDH2 PGI2 PGD PGM2 MDH1 MDH3 IDH2 251 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 4 1 1 4 252 NA NA NA NA NA NA 1 NA NA 2 1 1 NA 2 NA NA NA NA NA 253 1 1 1 1 1 1 2 1 1 2 1 1 1 2 1 4 1 2 4 254 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 4 1 1 4 255 1 1 1 1 1 1 2 1 1 2 1 1 1 2 1 4 1 2 4 [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.