[R] log of small values in R

[Martin Møller Skarbiniks Pedersen]

On Mon, 11 Jan 2021 at 08:22, Shaami <nzshaam using gmail.com> wrote:
>
> Dear Friends        I am facing the problem of log values in R. The
> log(1-0.99999999999999999) is giving -Inf while log(1e-18) gives finite
> answer. Any suggestion to deal with this problem?  Thank you


This vignette has a lot of good information about log of small numbers.

vignette(package = "Rmpfr", "log1mexp-note")
https://cran.r-project.org/web/packages/Rmpfr/vignettes/log1mexp-note.pdf

Regards
Martin M. S. Pedersen

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