[R] About the multiprecision computing package in R
Erin Hodgess
er|nm@hodge@@ @end|ng |rom gm@||@com
Sat Mar 14 21:31:22 CET 2020
Got it! Thanks!
On Sat, Mar 14, 2020 at 2:24 PM J C Nash <profjcnash using gmail.com> wrote:
> As I understand things, OpenBLAS will improve the performance of
> computations on regular IEEE 754 formats.
>
> I use Rmpfr for much longer numbers, e.g., 50 decimal digits, which --
> depending on scale of numbers in a
> vector -- can mean one needs approximately 100 decimals to accumulate the
> dot product. As I indicated, I
> have not been able to verify the internals. Probably I'll have to dig.
> However, for the moment I'm using
> David Smith's FM-Fortran, which offers a dot product function which does
> appear to do this.
>
> JN
>
> On 2020-03-14 4:17 p.m., Erin Hodgess wrote:
> > Are you using a PC, please? You may want to consider installing
> OpenBLAS. It’s a bit tricky but worth the time/effort.
> >
> > Thanks,
> > Erin
> >
> >
> > On Sat, Mar 14, 2020 at 2:10 PM J C Nash <profjcnash using gmail.com <mailto:
> profjcnash using gmail.com>> wrote:
> >
> > Rmpfr does "support" matrix algebra, but I have been trying for some
> > time to determine if it computes "double" precision (i.e., double the
> > set level of precision) inner products. I suspect that it does NOT,
> > which is unfortunate. However, I would be happy to be wrong about
> > this.
> >
> > JN
> >
> > On 2020-03-14 3:41 p.m., Bert Gunter wrote:
> > > Read its documentation yourself and unless you have good reason
> not to,
> > > always cc the list (which I have done here).
> > >
> > >
> > > Bert Gunter
> > >
> > > "The trouble with having an open mind is that people keep coming
> along and
> > > sticking things into it."
> > > -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
> > >
> > >
> > > On Sat, Mar 14, 2020 at 12:28 PM 林伟璐 <13917987541 using 163.com <mailto:
> 13917987541 using 163.com>> wrote:
> > >
> > >> Thanks. Does it support matrix algebra?
> > >>
> > >>
> > >>
> > >> 林伟璐
> > >> 邮箱：13917987541 using 163.com <mailto:13917987541 using 163.com>
> > >>
> > >>
> > <
> https://maas.mail.163.com/dashi-web-extend/html/proSignature.html?iconUrl=http%3A%2F%2Fmail-online.nosdn.127.net%2F17c23bc1722125aa6261c33736f525c5.jpg&name=%E6%9E%97%E4%BC%9F%E7%92%90&uid=13917987541%40163.com&ftlId=1&items=%5B%22%E9%82%AE%E7%AE%B1%EF%BC%9A13917987541%40163.com%22%5D
> >
> > >>
> > >> 签名由 网易邮箱大师 <https://mail.163.com/dashi/dlpro.html?from=mail88> 定制
> > >>
> > >> On 03/15/2020 03:18, Bert Gunter <bgunter.4567 using gmail.com <mailto:
> bgunter.4567 using gmail.com>> wrote:
> > >> Use google instead, as I recommended. If that's impossible in
> China, you
> > >> should state that and what you tried (Baidu) in your query.
> > >>
> > >> You'll get the Rmpfr package.
> > >>
> > >> Bert Gunter
> > >>
> > >> "The trouble with having an open mind is that people keep coming
> along and
> > >> sticking things into it."
> > >> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
> > >>
> > >>
> > >> On Sat, Mar 14, 2020 at 11:48 AM 林伟璐 <13917987541 using 163.com
> <mailto:13917987541 using 163.com>> wrote:
> > >>
> > >>> Thanks, I tried Baidu but get nothing
> > >>>
> > >>>
> > >>>
> > >>> 林伟璐
> > >>> 邮箱：13917987541 using 163.com <mailto:13917987541 using 163.com>
> > >>>
> > >>>
> > <
> https://maas.mail.163.com/dashi-web-extend/html/proSignature.html?iconUrl=http%3A%2F%2Fmail-online.nosdn.127.net%2F17c23bc1722125aa6261c33736f525c5.jpg&name=%E6%9E%97%E4%BC%9F%E7%92%90&uid=13917987541%40163.com&ftlId=1&items=%5B%22%E9%82%AE%E7%AE%B1%EF%BC%9A13917987541%40163.com%22%5D
> >
> > >>>
> > >>> 签名由 网易邮箱大师 <https://mail.163.com/dashi/dlpro.html?from=mail88>
> 定制
> > >>>
> > >>> On 03/15/2020 02:44, Bert Gunter <bgunter.4567 using gmail.com
> <mailto:bgunter.4567 using gmail.com>> wrote:
> > >>> Here's a novel idea:
> > >>> Do a google search on "multiprecision computing package R" for
> an answer.
> > >>>
> > >>> Bert Gunter
> > >>>
> > >>> "The trouble with having an open mind is that people keep coming
> along
> > >>> and sticking things into it."
> > >>> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip
> )
> > >>>
> > >>>
> > >>> On Sat, Mar 14, 2020 at 10:36 AM 林伟璐 <13917987541 using 163.com
> <mailto:13917987541 using 163.com>> wrote:
> > >>>
> > >>>> Dear all
> > >>>>
> > >>>>
> > >>>> I need a multiprecision computing package in R, if anyone in
> the list
> > >>>> knows, please let me known...
> > >>>>
> > >>>>
> > >>>> Many thanks
> > >>>>
> > >>>>
> > >>>> Weilu Lin
> > >>>> [[alternative HTML version deleted]]
> > >>>>
> > >>>> ______________________________________________
> > >>>> R-help using r-project.org <mailto:R-help using 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]]
> > >
> > > ______________________________________________
> > > R-help using r-project.org <mailto:R-help using 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.
> > >
> >
> > ______________________________________________
> > R-help using r-project.org <mailto:R-help using 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.
> >
> > --
> > Erin Hodgess, PhD
> > mailto: erinm.hodgess using gmail.com <mailto:erinm.hodgess using gmail.com>
>
--
Erin Hodgess, PhD
mailto: erinm.hodgess using gmail.com
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