topic Hi, in Intel® oneAPI Math Kernel Library

Calculate determinant for matrix using MKL

nguyen_k_ — Mon, 14 Mar 2016 09:33:32 GMT

Hi, I need to calculate the determinant of a square matrix with MKL(ipp 9.0 - parallel_studio_xe_2016). I searched solution for whole day but still not find the solution.

Which approach should I follow?

Thank you.

One way is to perform the

mecej4 — Mon, 14 Mar 2016 12:20:17 GMT

One way is to perform the permuted LU decomposition using ?getrf(). Those routines replace the input matrix A by L and U, with L having a unit diagonal. Therefore, the determinant is simply evaluated as Π_i=1..n(a_ii) after the call to ?getrf() has returned.

Hi,

Alexander_K_Intel2 — Mon, 14 Mar 2016 15:08:26 GMT

Hi,

Are you interested in determinant of sparse or dense matrix? If dense than mecej4 is correct - dgetrf is the way to find it. For sparse matrix dss routine return determinant value

Thanks,

Alex

Quote:mecej4 wrote:

nguyen_k_ — Tue, 15 Mar 2016 07:53:00 GMT

Thank you all, I'll try ?getrf()