in this case you need to use the 'lower.tail' argument, e.g.,

pnorm(8:15, lower.tail = FALSE)


I hope it helps.

Best,
Dimitris


Bhoom Suktitipat wrote:
Hello R-Help,

I ran some analysis and were hit with some low Z-score. I tried to convert
it to a p-value, however, it seems like the ceiling is around 1e-16.

1-pnorm(8)
[1] 6.661338e-16
1-pnorm(9)
[1] 0

Do you have any suggestion how I can display a very low p-value in the form
of scientific number format?

Thank you very much.

Regards,
Bhoom

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Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus University Medical Center

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