Can anyone please put literature about UDU' factorization of P matrix, i need it to write RLS code. Thanks, muchas gracias!
- posted
15 years ago
Can anyone please put literature about UDU' factorization of P matrix, i need it to write RLS code. Thanks, muchas gracias!
If you really need to write RLS (I assume Recursive Least Square identification) code, you can use this resource:
Do you understand how RLS works at all? Are you sure you need to use UDU' decomposition? If I remember correctly, UDU factorization is needed if RLS algorithm is applied to ill conditioned matrix. If matrix P is ill conditioned, then numerical problem can arise when calculating new iterative parameter estimation. In such cases, matrix inversion P^(-1) become problematic. Anway, in the above link you can find code for UDU' factorization.
Best regards, Asim Vodencarevic
Thanks for answering and puting that link. yes i understand how RLS works, but i don't know how UDU' factorization helps solving numerical problem. i was looking for literature which could explain it. How did someone come on idea to decompose matrix on one diagonal and other upper-triangular. it didn't fall from the sky . Best regards (Pozdrav)!
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