[R] extracting p-values in scientific notation

[Kenn Konstabel]

> is(x)
[1] "htest"
> # take a look at     stats:::print.htest
> format.pval(x$p.value)
[1] "< 2.22e-16"

Does that answer your question?

KK

On Mon, Oct 3, 2011 at 10:53 AM, Liviu Andronic <landronimirc at gmail.com> wrote:
> Dear all
> How does print.htest display the p-value in scientific notation?
>> (x <- cor.test(iris[[1]], iris[[3]]))
>
>        Pearson's product-moment correlation
>
> data:  iris[[1]] and iris[[3]]
> t = 21.65, df = 148, p-value < 2.2e-16
> alternative hypothesis: true correlation is not equal to 0
> 95 percent confidence interval:
>  0.8270 0.9055
> sample estimates:
>   cor
> 0.8718
>
> Above the p-value comes as '< 2.2e-16', while inspecting the object I
> get a good old '0'.
>> x$p.value
> [1] 0
>
> I tried to inspect print.htest but couldn't find it. I also played
> with format, round and the like to no avail. Any pointers?
>
> Regards
> Liviu
>
>
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