Thanks Stefano! I figured out that |. would reverse matrices too, about 5 minutes after posting!
But hey, that's why you ask questions on a public forum, so that the embarrassingly simple answer pops into your head as soon as you've posted. Thanks to everyone for the usual many suggestions re the id matrix, plenty of food for thought there. On Fri, 2010-08-20 at 12:49 +0200, Stefano Lanzavecchia wrote: > Once you know how to build the identity matrix [...] you reverse it > and that's it. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
