[R] How many decimal places of information does R actually use in computation?
Bert Gunter
gunter.berton at gene.com
Tue May 21 05:39:34 CEST 2013
See, e.g.
http://en.wikipedia.org/wiki/Double-precision_floating-point_format
Also in ?print.default please note:
Large number of digits
Note that for large values of digits, currently for digits >= 16, the
calculation of the number of significant digits will depend on the
platform's internal (C library) implementation of sprintf()
functionality.
-- Bert
On Mon, May 20, 2013 at 6:06 PM, Xiao He <praguewatermelon at gmail.com> wrote:
> Dear R-users:
>
> Hi, I read here (
> http://stackoverflow.com/questions/2287616/controlling-digits-in-r) that R
> is only accurate up to the 15th decimal place, despite the fact that if you
> choose to display more decimal places, it will. I wonder if R uses the
> information beyond the 15th decimal place in actual computation. Thanks!
>
>
> Best,
> Xiao
>
> [[alternative HTML version deleted]]
>
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--
Bert Gunter
Genentech Nonclinical Biostatistics
Internal Contact Info:
Phone: 467-7374
Website:
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