Gabor, Can you confirm that the bc function is supposed to be current. The bc package works with my Mac, but not with Windows. I keep getting the message
Error in system(cmd, input = input, intern = TRUE) : -l The FAQ on your https://code.google.com/p/r-bc/ page didn't get me past that problem. I tried both the download bc.zip from the page and also the cygwin bc. A secondary issue is that placing your bc.exe into c:/Program Files/R/R-3.1.0/library/bc/bcdir/bc.exe gives the message > one <- bc(1) Error in system(cmd, input = input, intern = TRUE) : 'C:/Program' not found Working around that is possible with > bc.cmd <- "C:/Progra~1/R/R-3.1.0/library/bc/bcdir/bc.exe -l" > one <- bc(1, cmd=bc.cmd) but the next line gives the same problem > one Error in system(cmd, input = input, intern = TRUE) : 'C:/Program' not found Thanks Rich On Sun, May 4, 2014 at 1:10 PM, Gabor Grothendieck <ggrothendi...@gmail.com> wrote: > Checking this with the bc R package (https://code.google.com/p/r-bc/), > the Ryacas package (CRAN), the gmp package (CRAN) and the Windows 8.1 > calculator all four give the same result: > >> library(bc) >> bc("168988580159 * 36662978") > [1] "6195624596620653502" > >> library(Ryacas) >> yacas("168988580159 * 36662978", retclass = "character") > 6195624596620653502 > >> library(gmp) >> as.bigz("168988580159") * as.bigz("36662978") > Big Integer ('bigz') : > [1] 6195624596620653502 > > > On Sun, May 4, 2014 at 12:50 PM, Ted Harding <ted.hard...@wlandres.net> wrote: >> On 04-May-2014 14:13:27 Jorge I Velez wrote: >>> Try >>> >>> options(digits = 22) >>> 168988580159 * 36662978 >>># [1] 6195624596620653568 >>> >>> HTH, >>> Jorge.- >> >> Err, not quite ... ! >> I hitch my horses to my plough (with help from R): >> >> options(digits=22) >> 168988580159*8 = 1351908641272 (copy down) >> 168988580159*7 = 1182920061113 ( " " ) >> 168988580159*9 = 1520897221431 ( " " ) >> 168988580159*2 = 337977160318 ( " " ) >> 168988580159*6 = 1013931480954 ( " " )^3 >> 168988580159*3 = 506965740477 ( " " ) >> >> 1351908641272 >> 11829200611130 >> 152089722143100 >> 337977160318000 >> 10139314809540000 >> 101393148095400000 >> 1013931480954000000 >> 5069657404770000000 >> ====================== >> 6195624596620653502 >> [after adding up mentally] >> >> compared with Jorge's: >> 6195624596620653568 >> >> ("02" vs "68" in the final two digits). >> >> Alternatively, if using a unixoid system with 'bc' present, >> one can try interfacing R with 'bc'. 'bc' is an calculating >> engine which works to arbitrary precision. >> >> There certainly used to be a utility in which R can evoke 'bc', >> into which one can enter a 'bc' command and get the result >> returned as a string, but I can't seem to find it on CRAN now. >> In any case, the raw UNIX command line for this calculation >> with 'bc' (with result) is: >> >> $ bc -l >> [...] >> 168988580159 * 36662978 >> 6195624596620653502 >> quit >> >> which agrees with my horse-drawn working. >> >> Best wishes to all, >> Ted. >> >>> On Sun, May 4, 2014 at 10:44 PM, ARTENTOR Diego Tentor < >>> diegotento...@gmail.com> wrote: >>> >>>> Trying algorithm for products with large numbers i encountered a difference >>>> between result of 168988580159 * 36662978 in my algorithm and r product. >>>> The Microsoft calculator confirm my number. >>>> >>>> Thanks. >>>> -- >>>> * Gráfica ARTENTOR * >>>> >>>> de Diego L. Tentor >>>> Echagüe 558 >>>> Tel.:0343 4310119 >>>> Paraná - Entre Ríos >> >> ------------------------------------------------- >> E-Mail: (Ted Harding) <ted.hard...@wlandres.net> >> Date: 04-May-2014 Time: 17:50:54 >> This message was sent by XFMail >> >> ______________________________________________ >> R-help@r-project.org mailing list >> 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. > > > > -- > Statistics & Software Consulting > GKX Group, GKX Associates Inc. > tel: 1-877-GKX-GROUP > email: ggrothendieck at gmail.com > > ______________________________________________ > R-help@r-project.org mailing list > 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 mailing list 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.
