
Ublas : 
From: Richard_Harding_at_[hidden]
Date: 20070212 18:28:06
Hello,
I have a very sparse matrix (<= 6 nnz entries per row with potentially
thousands of columns) which I need to premultiply by its transpose in
order to solve the normal equations associated with a leastsquares
computation: (A'A)x = A'b. I may have missed them, but I did not find any
builtin matrixtransposematrix or matrixtransposevector operations in
uBLAS. Iwas wondering if anyone has had any experience implementing these
efficiently? I need the end result in a columnmajor, compressed_matrix in
order to utilize the bindings to UMFPACK.
Thanks!