a logical indicating whether you want paired
a character string specifying the alternative
hypothesis, must be one of "two.sided" (default),
"greater" or "less". Can be abbreviated.
additional arguments to pass to t.test.
Object of class "pairwise.htest"
The pool.sd switch calculates a common SD for all
groups and uses that for all comparisons (this can be useful if some
groups are small). This method does not actually call t.test,
so extra arguments are ignored. Pooling does not generalize to paired tests
so pool.sd and paired cannot both be TRUE.
Only the lower triangle of the matrix of possible comparisons is being
calculated, so setting alternative to anything other than
"two.sided" requires that the levels of g are ordered