Hi, have a look at ?try which leads to using a construct of the following form:
myTtest <- try(t.test(...)) if (inherits(myTtest, "try-error")) { cat(myTtest) myTtest <- NA } Christian ______________________________________________ R-help@r-project.org 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.