[Boost-users] Re: ublas and matrix expression

Russell Hind wrote:

Thanks, where are these methods defined? I'm using 1.30.2 and have searched the ublas directory for files with lu_factorize in and can't find it.

I do not know when these routines arrived, but they are certainly present in boost 1.31. Example usage: #include // On return from lu_factorize, // A contains the LU factorization and pm the row pivots. ublas::permutation_matrix pm(A.size1()); lu_factorize(A, pm); // Initialise el so that it contains the 'b' of Ax = b ublas::vector<double> el(zero); el(el.size() - 1) = total_length; // On return from lu_substitute, // el contains the 'x' of Ax=b. lu_substitute(A, pm, el); -- Angus