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Questions on the algorithmic/computational aspects of linear algebra, including the solution of linear systems, least squares problems, eigenproblems, and other such matters.

1 vote

Eigenvectors: MATLAB vs LAPACK DGGEV or DGGEVX

The best way to find the answer to this question was to experiment: We calculated the Eigen values & vectors of two badly-conditioned matrices with MATLAB R2013b by using eig command like eig(a,b,'qz …
Megidd's user avatar
  • 165
4 votes
2 answers
3k views

Eigenvectors: MATLAB vs LAPACK DGGEV or DGGEVX

If we call LAPACK DGGEV or DGGEVX routines for two badly-conditioned matrices in a C++ code, will we get the same eigen-values & vectors as MATLAB's eig command with 'qz' algorithm like: eig(a,b,'qz') …
Megidd's user avatar
  • 165