Many questions about LAPACK are answered at http://www.netlib.org/lapack/faq.html
There are prebuilt binaries for some architectures at http://www.netlib.org/lapack/archives/ Whether these need additional tweaking to work with J, I don't know: if not, it is probably better to let the netlib people do the work. Best wishes, John Eric Iverson wrote: > Quick comment: the lapack distributed with J Windows was built from lapack > source from several years ago. There have been serveral updates to the > source since then. Unix Lapack tends to be part of of the distribution and > is likely more current. Perhaps we (Jsoftware) should distribute a more > current windows lapack, but this is probably an area where user > contribution > would be a better route. That is, someone with interest and knowledge > should > build a current Windows Lapack (assuming this isn't simply a matter of > providing a pointer to someone else who already does this) and provide the > links and downloads. > > ----- Original Message ----- > From: "John Randall" <[EMAIL PROTECTED]> > To: "Programming forum" <[email protected]> > Sent: Friday, March 03, 2006 7:16 AM > Subject: Re: [Jprogramming] LAPACK question: principal eigenvector > > >> There do seem to be slight variations between results from the Windows >> and >> Linux versions of LAPACK. They are mathematically insignificant, but >> have >> an effect if you are erroneously relying on order of results. Here's my >> revised code for calculating a principal eigenvector using LAPACK. >> >> require '~addons/lapack/lapack.ijs' >> require '~addons/lapack/dgeev.ijs' >> la=:3 : 0 >> 'l c r'=.dgeev_jlapack_ y. >> ({. \: c){"1 r >> ) >> >> und=: >(1,1,5);(1,1,3);((%5),(%3),1) NB. "Understandability >> (%+/)power und >> 0.48064 0.405388 0.113972 >> %+/)la und >> 0.48064 0.405388 0.113972 >> >> Best wishes, >> >> John >> >> >> >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
