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Title: Addressing #84 and #85 by mp4096 · Pull Request #91 · python-control/python-control · GitHub

Open Graph Title: Addressing #84 and #85 by mp4096 · Pull Request #91 · python-control/python-control

X Title: Addressing #84 and #85 by mp4096 · Pull Request #91 · python-control/python-control

Description: Compute poles of a state-space system using numpy.linalg.eigvals as suggested in #84 Replaced matrix inversion in the feedback computation by numpy.linalg.solve as suggested in #85 Also replaced the singularity check with a more stable one. numpy.linalg.matrix_rank uses a reasonable numerical threshold, so that we don't need to check abs(det(F)) by hand. Determinant is actually very sensitive to matrix scaling, so better not use it. Both the determinant and the SVD required for matrix_rank are cubic, so there should be no slowdown.

Open Graph Description: Compute poles of a state-space system using numpy.linalg.eigvals as suggested in #84 Replaced matrix inversion in the feedback computation by numpy.linalg.solve as suggested in #85 Also replaced th...

X Description: Compute poles of a state-space system using numpy.linalg.eigvals as suggested in #84 Replaced matrix inversion in the feedback computation by numpy.linalg.solve as suggested in #85 Also replaced th...

Opengraph URL: https://github.com/python-control/python-control/pull/91

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217ccf6 Merge remote-tracking branch 'refs/remotes/python-control/master' mp4096 May 20, 2016 https://github.com/python-control/python-control/pull/91/commits/217ccf62725b3162f0b95fadb95a5e5af06b7dfe
2959df8 Working towards #84 and #85 mp4096 May 20, 2016 https://github.com/python-control/python-control/pull/91/commits/2959df89df338a24b7ef420da0c920c7e883f3d1
6aee194 Added sorting of poles to the state-space unit test mp4096 May 20, 2016 https://github.com/python-control/python-control/pull/91/commits/6aee19452adfdb4059d8d48e396ee6b66dac8020
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