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
