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 <profjcn...@gmail.com > <mailto:profjcn...@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 <13917987...@163.com > <mailto:13917987...@163.com>> wrote: > > > >> Thanks. Does it support matrix algebra? > >> > >> > >> > >> 林伟璐 > >> 邮箱：13917987...@163.com <mailto:13917987...@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.4...@gmail.com > <mailto:bgunter.4...@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 <13917987...@163.com > <mailto:13917987...@163.com>> wrote: > >> > >>> Thanks, I tried Baidu but get nothing > >>> > >>> > >>> > >>> 林伟璐 > >>> 邮箱：13917987...@163.com <mailto:13917987...@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.4...@gmail.com > <mailto:bgunter.4...@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 <13917987...@163.com > <mailto:13917987...@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@r-project.org <mailto:R-help@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@r-project.org <mailto:R-help@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@r-project.org <mailto:R-help@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.hodg...@gmail.com <mailto:erinm.hodg...@gmail.com> ______________________________________________ R-help@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.
