> Pavel Krivitsky
> on Wed, 28 May 2025 01:36:57 + writes:
> Dear All,
> Thanks for looking into it, and apologies for bumping this.
> I think the strangest thing for me is that the C and the R
> implementations on Windows yield different results. I don't know if
Dear All,
Thanks for looking into it, and apologies for bumping this.
I think the strangest thing for me is that the C and the R
implementations on Windows yield different results. I don't know if it
warrants a deeper look.
Ultimately, I rewrote the code that relied on this behaviour. (I needed
Hello!
My three Groschen:
On MacOS (Intel CPU) and R 4.4.3 I report:
> dput(.Machine$double.xmax, control = 'hex')
0x1.fp+1023
> dput(sqrt(.Machine$double.xmax), control = 'hex')
0x1.fp+511
> dput(sqrt(.Machine$double.xmax)^2, control = 'hex')
0x1.ep+1023
so as
On Tue, 29 Apr 2025 12:00:09 +0200
Martin Maechler wrote:
> Would you (or anybody else) know if this is new behaviour or it
> also happened e.g. in R 4.4.x versions on Windows?
R-4.3.1 on Windows 7 in a virtual machine gives:
dput(sqrt(.Machine$double.xmax), control = 'hex')
# 0x1p+512
sqrt(.M
> Pavel Krivitsky via R-devel
> on Mon, 28 Apr 2025 05:13:41 + writes:
> Hello, Under R 4.5.0 on Windows (x86-64), I get:
>> sqrt(.Machine$double.xmax)^2
> [1] Inf
>> sqrt(.Machine$double.xmax)*sqrt(.Machine$double.xmax)
> [1] Inf
> On other hand on other
Hello,
Under R 4.5.0 on Windows (x86-64), I get:
> sqrt(.Machine$double.xmax)^2
[1] Inf
> sqrt(.Machine$double.xmax)*sqrt(.Machine$double.xmax)
[1] Inf
On other hand on other platforms, including Debian Linux (x86-64), I
get:
d> sqrt(.Machine$double.xmax)^2
[1] 1.797693134862315508561e+308
d> s
