I should also mention that the timings can be quite different (probably worse) for an sprand matrix than for a matrix that comes from discretizing a mesh, even with the same number of nonzeros. How well sparse-direct algorithms work depends a lot on the structure of the sparsity pattern.
- [julia-users] Why does QR beat LU for sparse, square m... Jonas Kersulis
- [julia-users] Re: Why does QR beat LU for sparse,... Miles Lubin
- [julia-users] Re: Why does QR beat LU for sparse,... Steven G. Johnson
- [julia-users] Re: Why does QR beat LU for spa... Steven G. Johnson
- [julia-users] Re: Why does QR beat LU for sparse,... Kristoffer Carlsson
- [julia-users] Re: Why does QR beat LU for spa... Kristoffer Carlsson
- [julia-users] Re: Why does QR beat LU for spa... Steven G. Johnson