[R] wilcox.test p-value = 0

[Murat Tasan]

hi, folks,

how have you gone about reporting a p-value from a test when the
returned value from a test (in this case a rank-sum test) is
numerically equal to 0 according to the machine?

the next lowest value greater than zero that is distinct from zero on
the machine is likely algorithm-dependent (the algorithm of the test
itself), but without knowing the explicit steps of the algorithm
implementation, it is difficult to provide any non-zero value.  i
initially thought to look at .Machine at double.xmin, but i'm not
comfortable with reporting p < .Machine at double.xmin, since without
knowing the specifics of the implementation, this may not be true!

to be clear, if i have data x, and i run the following line, the
returned value is TRUE.

wilcox.test(x)$p.value == 0

thanks for any help on this!