[R] multiple comparison test

From: Julie BERTRAND <juliebertrand2001_at_yahoo.fr>
Date: Mon 06 Jun 2005 - 19:20:48 EST


hello,  

after an anova I use pairwise.t.test(), it gives only p.value and I want the t.stat.
I try to get these by computing the Welch approximation of the degree of freedom and using the qt(p.value,df) function but when I test this method with t.test results (the function gives p.value and t.test), I doesn't find the same t.stat.  

I also use the simtest(x~y,type="Tukey") function and it gives me only negative t.stat, resulting in a weard distribution...  

thank you in advance for all the attention you 'll give to my problems.
Julie BERTRAND



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