Hello,
I am Koushik Aravalli from Clemson University. I am using CLAPACK for my
research and trying to decode the resultant matrices formed from the
subroutines dgeqr2.c, dgetrf.c. For example the final matrix formed out from
the dgetrf subroutine is a combination of a matrix produced from a scalar
and a vector. The below message is from the subroutine mentioned.
FROM CLAPACK dgetrf subroutine.
Further Details
===============
The matrix Q is represented as a product of elementary reflectors
Q = H(1) H(2) . . . H(k), where k = min(m,n).
Each H(i) has the form
H(i) = I  tau * v * v'
where tau is a real scalar, and v is a real vector with
v(1:i1) = 0 and v(i) = 1; v(i+1:m) is stored on exit in A(i+1:m,i),
and tau in TAU(i).
=============
So if I solve for a linear equation set using QR decomposition, the final
matrix obtained is a product of reflectors. Comparing with the MATLAB
results I am not able to figure out a way to decode the matrix obtained from
"dgetrf" subroutine. By the way I am using MS Visual studio to do these
matrix computations.
Can you please help me out in obtaining the decoded matrix results.
Thank you,
Koushik Aravalli
 next part 
An HTML attachment was scrubbed...
URL:
http://lists.cs.utk.edu/private/lapack/attachments/20060828/e2c37b44/attachment.htm
