René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"testMimoW123 fails when compiled from source","articleBody":"Hi,\r\n\r\nI've installed Slycot and python-control from source and have run the provided test script:\r\n`python setup.py test`\r\nI get one failed test:\r\n```\r\n======================================================================\r\nFAIL: testMimoW123 (control.tests.robust_test.TestAugw)\r\nMIMO plant with all weights\r\n----------------------------------------------------------------------\r\nTraceback (most recent call last):\r\n  File \"/home/akum036/lib/python-control/control/tests/robust_test.py\", line 303, in testMimoW123\r\n    self.siso_almost_equal(w3g[0,0], p[4,2])\r\n  File \"/home/akum036/lib/python-control/control/tests/robust_test.py\", line 59, in siso_almost_equal\r\n    raise AssertionError('systems not approx equal; max num. coeff is {}\\nsys 1:\\n{}\\nsys 2:\\n{}'.format(maxnum,g,h))\r\nAssertionError: systems not approx equal; max num. coeff is 5.244462877690618e-08\r\nsys 1:\r\nA = [[-1. -2.  0.  0.]\r\n [-3. -4.  0.  0.]\r\n [ 2.  3. -4. -5.]\r\n [ 5.  7. -6. -7.]]\r\n\r\nB = [[1.]\r\n [0.]\r\n [2.]\r\n [5.]]\r\n\r\nC = [[23. 29. 11. 13.]]\r\n\r\nD = [[23.]]\r\n\r\nsys 2:\r\nA = [[-2.  0.  0.  0.  0.  0. -2.  0.]\r\n [ 0. -2.  0.  0.  0.  0.  0. -2.]\r\n [ 0.  0. -3.  0.  0.  0.  0.  0.]\r\n [ 0.  0.  0. -4.  0.  0.  0.  0.]\r\n [ 0.  0.  0.  0. -4. -5.  2.  3.]\r\n [ 0.  0.  0.  0. -6. -7.  5.  7.]\r\n [ 0.  0.  0.  0.  0.  0. -1. -2.]\r\n [ 0.  0.  0.  0.  0.  0. -3. -4.]]\r\n\r\nB = [[-2.]\r\n [ 0.]\r\n [ 3.]\r\n [ 0.]\r\n [ 2.]\r\n [ 5.]\r\n [ 1.]\r\n [ 0.]]\r\n\r\nC = [[ 0.  0.  0.  0. 11. 13. 23. 29.]]\r\n\r\nD = [[23.]]\r\n```\r\n\r\nThe difference is fairly small (~5e-8)between the two systems, but exceeds the testing threshold (1e-8). Would anyone have ideas as to why this test is now failing, assuming it used to pass in earlier releases?\r\n\r\nThanks,\r\n\r\nAvi","author":{"url":"https://github.com/akum036","@type":"Person","name":"akum036"},"datePublished":"2018-01-31T10:56:59.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/190/python-control/issues/190"}