[R] t-test

[Peter Dalgaard]

John Mason wrote:
> I have downloaded the latest version of R and continue to have the same problem I did with the previuos version which is that I am unable to run a two-sample t-test in R-commander. I can run a paired t-test and a one sample t-test but not a two-sample t-test or one factor ANOVA. The data have been both imported and entered directly into R-cmdr and I can run regressions and basic data summaries on these data but not the t-tests described above. Any ideas? Windows XP on a Dell built within last year.
>    
>   John
>   
Have you converted your grouping variables to factors? Rcmdr is pretty 
insistent on that point.