Dear Jed, Thanks a lot!
R Quoting Jed Brown <jed at 59A2.org>: > On Sun, 11 Jul 2010 00:50:30 -0400, "(Rebecca) Xuefei YUAN" > <xy2102 at columbia.edu> wrote: >> Dear all, >> >> If testing the hand coded Jacobian, the ratio is 1e-10, but the >> difference is 1e-4, would this be some mistakes in Jacobian? > > This is fine, it just means that your matrix hasn't been scaled to O(1). > > Jed > > -- (Rebecca) Xuefei YUAN Department of Applied Physics and Applied Mathematics Columbia University Tel:917-399-8032 www.columbia.edu/~xy2102
