[ViennaCL-devel] Test matrices for iterative solvers and preconditioners
Hi all, Is there a set of test matrices I could / should use for testing the iterative solvers and preconditioners? Clearly, the matrices should satisfy the conditions required of the algorithms; I've tried to find matrices on MatrixMarket, but there are far fewer results than I was expecting, and (for instance) it seems hard to find there a real symmetric positive definite system matrix with an associated RHS (or such that you could generate a feasible RHS). I was hoping to be able to run my tests on various real-world data, because I know that results can often be input-dependent! Ciao, Toby -- Toby St Clere Smithe http://tsmithe.net -- Infragistics Professional Build stunning WinForms apps today! Reboot your WinForms applications with our WinForms controls. Build a bridge from your legacy apps to the future. http://pubads.g.doubleclick.net/gampad/clk?id=153845071iu=/4140/ostg.clktrk ___ ViennaCL-devel mailing list ViennaCL-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/viennacl-devel
Re: [ViennaCL-devel] Test matrices for iterative solvers and preconditioners
Hi Toby, Is there a set of test matrices I could / should use for testing the iterative solvers and preconditioners? Clearly, the matrices should satisfy the conditions required of the algorithms; I've tried to find matrices on MatrixMarket, but there are far fewer results than I was expecting, and (for instance) it seems hard to find there a real symmetric positive definite system matrix with an associated RHS (or such that you could generate a feasible RHS). I was hoping to be able to run my tests on various real-world data, because I know that results can often be input-dependent! I suggest to use the same strategy as for the GUI, i.e. use an internal on-the-fly generation of symmetric, positive definite matrices. They can be used with all the relevant algorithms for testing purposes. The on-the-fly generator will be pushed (hopefully) tonight. Best regards, Karli -- Infragistics Professional Build stunning WinForms apps today! Reboot your WinForms applications with our WinForms controls. Build a bridge from your legacy apps to the future. http://pubads.g.doubleclick.net/gampad/clk?id=153845071iu=/4140/ostg.clktrk ___ ViennaCL-devel mailing list ViennaCL-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/viennacl-devel
Re: [ViennaCL-devel] Test matrices for iterative solvers and preconditioners
Hi Karli, Karl Rupp r...@iue.tuwien.ac.at writes: I suggest to use the same strategy as for the GUI, i.e. use an internal on-the-fly generation of symmetric, positive definite matrices. They can be used with all the relevant algorithms for testing purposes. The on-the-fly generator will be pushed (hopefully) tonight. OK, I've done that. I wrote such a routine in Python; it's only 25 (verbose) lines. Cheers, Toby -- Toby St Clere Smithe http://tsmithe.net -- Infragistics Professional Build stunning WinForms apps today! Reboot your WinForms applications with our WinForms controls. Build a bridge from your legacy apps to the future. http://pubads.g.doubleclick.net/gampad/clk?id=153845071iu=/4140/ostg.clktrk ___ ViennaCL-devel mailing list ViennaCL-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/viennacl-devel
Re: [ViennaCL-devel] Test matrices for iterative solvers and preconditioners
Hi Toby (and Namik), finally the on-the-fly matrix generation is pushed: https://github.com/viennacl/viennacl-dev/commit/7237e71f5b8b45f1403331cbed6cd1e49fa7b7d3 calling generate_fdm_laplace(A, points_x, points_y) fills the matrix A (can be a ublas::compressed_matrix (slow) or a ViennaCL matrix) such that it is symmetric, positive definite and has (points_x * points_y) columns and rows. Slight adjustments or extensions of the API are possible, but overall it is ready for use. Best regards, Karli On 08/04/2014 03:15 PM, Toby St Clere Smithe wrote: Hi Karli, Karl Rupp r...@iue.tuwien.ac.at writes: I suggest to use the same strategy as for the GUI, i.e. use an internal on-the-fly generation of symmetric, positive definite matrices. They can be used with all the relevant algorithms for testing purposes. The on-the-fly generator will be pushed (hopefully) tonight. OK, I've done that. I wrote such a routine in Python; it's only 25 (verbose) lines. Cheers, Toby -- Infragistics Professional Build stunning WinForms apps today! Reboot your WinForms applications with our WinForms controls. Build a bridge from your legacy apps to the future. http://pubads.g.doubleclick.net/gampad/clk?id=153845071iu=/4140/ostg.clktrk ___ ViennaCL-devel mailing list ViennaCL-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/viennacl-devel
