Re: How to use GNU MP in octave?

[Paul Kienzle]

Octave-forge has a symbolic toolbox with arbitrary precision arithmetic.

  symbols;
  x=v=one=vpa("1");
  for k=1:1000, v=v*x; x=x+one; end

  v

v =

402387260077093773543702433923003985719374864210714632543799910429938512 
398629020592044208486969404800479988610197196058631666872994808558901323 
829669944590997424504087073759918823627727188732519779505950995276120874 
975462497043601418278094646496291056393887437886487337119181045825783647 
849977012476632889835955735432513185323958463075557409114262417474349347 
553428646576611667797396668820291207379143853719588249808126867838374559 
731746136085379534524221586593201928090878297308431392844403281231558611 
036976801357304216168747609675871348312025478589320767169132448426236131 
412508780208000261683151027341827977704784635868170164365024153691398281 
264810213092761244896359928705114964975419909342221566832572080821333186 
116811553615836546984046708975602900950537616475847728421889679646244945 
160765353408198901385442487984959953319101723355556602139450399736280750 
137837615307127761926849034352625200015888535147331611702103968175921510 
907788019393178114194545257223865541461062892187960223838971476088506276 
862967146674697562911234082439208160153780889893964518263243671616762179 
168909779911903754031274622289988005195444414282012187361745992642956581 
746628302955570299024324153181617210465832036786906117260158783520751516 
284225540265170483304226143974286933061690897968482590125458327168226458 
066526769958652682272807075781391858178889652208164348344825993266043367 
660176999612831860788386150279465955131156552036093988180612138558600301 
435694527224206344631797460594682573103790084024432438465657245014402821 
885252470935190620929023136493273497565513958720559654228749774011413346 
962715422845862377387538230483865688976461927383814900140767310446640259 
899490222221765904339901886018566526485061799702356193897017860040811889 
729918311021171229845901641921068884387121855646124960798722908519296819 
372388642614839657382291123125024186649353143970137428531926649875337218 
940694281434118520158014123344828015051399694290153483077644569099073152 
433278288269864602789864321139083506217095002597389863554277196742822248 
757586765752344220207573630569498825087968928162753848863396909959826280 
956121450994871701244516461260379029309120889086942028510640182154399457 
156805941872748998094254742173582401063677404595741785160829230135358081 
840096996372524230560855903700624271243416909004153690105933983835777939 
410970027753472000000000000000000000000000000000000000000000000000000000 
000000000000000000000000000000000000000000000000000000000000000000000000 
000000000000000000000000000000000000000000000000000000000000000000000000 
000000000000000000000000000000000000000000000000


- Paul

On May 23, 2005, at 10:43 PM, lming_44 wrote:

> Hi!
>     I have a problem in calculating 1000! in octave. By default, octave
> will return "ans=Inf". So I have to write a C program with GNU MP lib.
> It is much more difficult to write a C program. Is there a method to
> calculate very large/small numbers in octave? I mean can I force Octave
> to do all its operators with high precision? No matter whether it use
> GNU MP or other libs or built-in ones. Thanks!
>     Regards.
>      lming
>
>
>
> -------------------------------------------------------------
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>
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-------------------------------------------------------------
Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
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