See ?try (as Uwe said) or ?tryCatch. Andy
> From: burak kutlu > > Hi > Although t.test does not give an error with > t.test(c(0, 0), c(0, 0)); > > if you try doing that with any number other than 0, > > > t.test(c(1,1),c(1,1)) > > (R gives the following error) > > > Error in t.test.default(c(1, 1), c(1, 1)) : > data are essentially constant > > The logic in insisting is that my data has different > columns, and I'd like to tolerate if in one of the > columns, the data fail to pass the t.test. > > Thanks > Burak > > --- Uwe Ligges <[EMAIL PROTECTED]> > wrote: > > > burak kutlu wrote: > > > Hello, > > > I was wondering if there is a way to ignore the > > error > > > message you get when some of the data means you > > > compare are constant in some lines of your data > > frame. > > > > What does the error message say exactly? > > Do you have an example? > > > > Even with the degenerated case > > t.test(c(0, 0), c(0, 0)) > > I don't get any error message. > > > > > > > I'd like to go ahead with t.test > > > > See ?try > > > > > and get the calculated p-values anyway in such a > > case. > > > > And what is the p-value in such a case? > > > > I guess I haven't understood the problem correctly, > > so please be more > > specific! > > > > Uwe Ligges > > > > > > > Thanks > > > -burak > > > > > > ______________________________________________ > > > 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 > > > > > > ______________________________________________ > 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 > > ______________________________________________ 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