On Fri, 7 Nov 2003, Christoph Bier wrote: > Peter Dalgaard wrote: > > > Well, the error message might be slightly beside the point, but the > > issue would seem to be that there are no "ja"'s inside either vector. > > I.e. it first reduces each factor to those levels that are actually > > present, then checks whether there are at least two levels. > > Thanks for this explanation. > > > You can't do a chisquare test on a table that looks like this > > > > nein ja > > nein 42 0 > > ja 0 0 > > > > Hm, and now? There is data like this and I need to do a chisquare > test. Spencer's answer seems to be the solution. > Is my data that uncommon, that chisq.test hasn't a built-in > function to avoid this error? >
It's not that your data are uncommon. Your data contain no information about whether `ja' answers tend to occur together for the two variables, because there no `ja' answers. -thomas ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help