[R] Display a very low p-value

[hadley wickham]

>  pnorm(37:39,lower.tail=FALSE)
> [1] 5.725571e-300  0.000000e+00  0.000000e+00
>
>  This is just a limitation of double precision floating-point arithmetic
> ...
>
>  curve(pnorm(x,lower.tail=FALSE),from=30,to=40,log="y")
> .Machine$double.xmin

But note

curve(pnorm(x,lower.tail=FALSE, log=T),from=30,to=1000)

Hadley

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