Hi All, I have been trying to get J to compute the eigen values & vectors of a matrix. I've come across http://www.jsoftware.com/jwiki/Essays/Eigenvaluesbut none of the algorithms there seem stable on my input matrix and the lapack package doesn't seem to work on 64-bit J. I laboriously exported the matrix to a .csv and then hacked up a C++ program that computes the eigen values using eigen ( http://eigen.tuxfamily.org/index.php?title=Main_Page) which had no problem with computing the eigen values.
What is the current state-of-the-art in eigen values in J? Should I just downgrade to 32-bit J and use the lapack package? Cheers, Mike Ps. There is nothing I like better than generating random input data using J. What took pages of Haskell and TCL was boiled down to 7 clear lines of J. WOW =) ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
