Yes - I found it and put it up on the wiki. I entered and updated the first section of code - enough to satisfy my curiosity about the mystery functions "ip" (Inner Product) and "ia" (Indices for Amend). It's at http://www.jsoftware.com/jwiki/DevonMcCormick/JacobiByMcIntyre .
I should notify Vector so they can grab it for their archive. On Fri, Jan 15, 2010 at 5:32 PM, Devon McCormick <[email protected]> wrote: > I see - I'd only started the article and wanted to jump right it. > Fortunately, I probably have a paper copy of that issue of Vector. I'll > check this evening. > > Thanks... > > > On Fri, Jan 15, 2010 at 5:29 PM, Sherlock, Ric > <[email protected]>wrote: > >> From my reading of this article I don't think that it is Eugene's >> intention is for these lines to be executable. He is referring to two lines >> that are part of a larger program for calculating Eigenvalues previously >> published in another article. They are simply there (along with his detailed >> explanation of what they do) to frame the ideas discussed in the rest of >> article. >> >> If you want Donald McIntyre's original code then they should be available >> in Vector 9, 3, January 1993. Unfortunately there doesn't seem to be an >> online version of this but perhaps you have a copy? >> >> > -----Original Message----- >> > From: [email protected] [mailto:programming- >> > [email protected]] On Behalf Of Devon McCormick >> > Sent: Saturday, 16 January 2010 10:51 >> > To: J-programming forum >> > Subject: [Jprogramming] "At Play with J" - missing fns? >> > >> > I opened my newly-received copy of "At Play With J" today to the >> > article on >> > Jacobi's method. Imagine my dismay at reading the first two lines of J >> > code >> > which I am unable to run as they depend on (at least) two definitions >> > not >> > given. In >> > >> > r=. ((cos,-sin),sin,cos) (ia R)} I >> > Q=. q ip |:r [ R=. r ip R ip |:r >> > >> > what are "ip" and "ia"? Am I missing something here in terms of a >> > reference? >> > >> > >> > -- >> > Devon McCormick, CFA >> > ^me^ at acm. >> > org is my >> > preferred e-mail >> > ---------------------------------------------------------------------- >> > For information about J forums see http://www.jsoftware.com/forums.htm >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm >> > > > > -- > Devon McCormick, CFA > ^me^ at acm. > org is my > preferred e-mail > > -- Devon McCormick, CFA ^me^ at acm. org is my preferred e-mail ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
