Hello.
I'm running R 4.4.0 on an iMac Venture 13.5.2 . There appears to be a bug
in as.double().
Create a string with a numeric digits followed by a single letter a thru f
(as tho' it's base 16).
for K in (a,b,c,d, and f ) , as.double( '123K') returns NA
but as.double('123e') returns 123 -- or whatever the first digit is.
Please let me know if there are additional tests I can try .
thanks
Carl Witthoft
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Hi Carl, Not that strange: R thinks you're using scientific notation. Also not a Mac bug.> as.double('123e')[1] 123> as.double('123e+0')[1] 123> as.double('123e+1')[1] 1230> as.double('123e-1')[1] 12.3 Can you explain what you're trying to accomplish? Sarah On Wed, May 1, 2024 at 3:24?PM Carl Witthoft <cellocgw at gmail.com> wrote:> > Hello. > I'm running R 4.4.0 on an iMac Venture 13.5.2 . There appears to be a bug > in as.double(). > > Create a string with a numeric digits followed by a single letter a thru f > (as tho' it's base 16). > > for K in (a,b,c,d, and f ) , as.double( '123K') returns NA > but as.double('123e') returns 123 -- or whatever the first digit is. > > Please let me know if there are additional tests I can try . > > > thanks > Carl Witthoft > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.-- Sarah Goslee (she/her) http://www.numberwright.com
This happens because "123e" looks like exponential form. This string
has no
exponent, so it gets treated as 0 exponent.
If you're interested in converting hex numbers, append 0x:
as.numeric("0x123a")
or use strtoi:
strtoi("123a", 16)
On Wed, May 1, 2024, 15:24 Carl Witthoft <cellocgw at gmail.com> wrote:
> Hello.
> I'm running R 4.4.0 on an iMac Venture 13.5.2 . There appears to be a
bug
> in as.double().
>
> Create a string with a numeric digits followed by a single letter a thru f
> (as tho' it's base 16).
>
> for K in (a,b,c,d, and f ) , as.double( '123K') returns NA
> but as.double('123e') returns 123 -- or whatever the first digit
is.
>
> Please let me know if there are additional tests I can try .
>
>
> thanks
> Carl Witthoft
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
[[alternative HTML version deleted]]
On 01/05/2024 11:32 a.m., Carl Witthoft wrote:> Hello. > I'm running R 4.4.0 on an iMac Venture 13.5.2 . There appears to be a bug > in as.double(). > > Create a string with a numeric digits followed by a single letter a thru f > (as tho' it's base 16). > > for K in (a,b,c,d, and f ) , as.double( '123K') returns NA > but as.double('123e') returns 123 -- or whatever the first digit is. > > Please let me know if there are additional tests I can try .This has been mentioned in the news recently. 123e was taken as scientific format, with an implied 0 at the end, i.e. 123e0. That is no longer true after the recent fix; I'm not sure if it is in R 4.4.0-patched yet. Duncan Murdoch
? Wed, 1 May 2024 11:32:32 -0400 Carl Witthoft <cellocgw at gmail.com> ?????:> but as.double('123e') returns 123 -- or whatever the first digit is.Nicely spotted problem! Prof. Brian D. Ripley has fixed it in R-devel revision 86436 [*]. Now as.double('123e') will also return NA. I think that the fix will become part of R-4.4.1 when it's released. -- Best regards, Ivan [*] https://github.com/r-devel/r-svn/commit/9069a729f5bf69de8250a4c91dd482fcf64e1154