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GeezerVison is showing github.com — improve forced_response and its documentation by bnavigator · Pull Request #588 · python-control/python-control

improve forced_response and its documentation #588

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Merged
bnavigator merged 12 commits into python-control:master from bnavigator:timeresp-doc
Apr 2, 2021

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Merged

improve forced_response and its documentation #588

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1f51526
update parameter doc and error message for forced_response
bnavigator Mar 24, 2021
2870432
allow T=None with sys.dt=None in forced_response
bnavigator Mar 24, 2021
517b1eb
timeresp: add test system with dt=None
bnavigator Mar 25, 2021
52a3fd4
more docstring fixups
bnavigator Mar 25, 2021
f0d764f
test forced_response omitting parameters as documented
bnavigator Mar 25, 2021
9cac9fa
ensure dlsim output length
bnavigator Mar 26, 2021
7be508b
rework fixture setup for timeresp_test
bnavigator Mar 26, 2021
a72441b
specify tolerance and add comment for markov test
bnavigator Mar 26, 2021
177290c
reactivate the the fast forced_response(U=0) algorithm and test it
bnavigator Mar 26, 2021
ce51d34
cover TF initial condition warning in forced_response
bnavigator Mar 27, 2021
4404169
reallow non zero timevector start
bnavigator Mar 27, 2021
a8b72f5
avoid different realizations with and without slycot
bnavigator Mar 27, 2021
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10 changes: 5 additions & 5 deletions 10 control/tests/modelsimp_test.py
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Original file line number Diff line number Diff line change
Expand Up @@ -65,8 +65,6 @@ def testMarkovSignature(self, matarrayout, matarrayin):
markov(Y, U, m)

# Make sure markov() returns the right answer
# forced response can return wrong shape until gh-488 is merged
@pytest.mark.xfail
@pytest.mark.parametrize("k, m, n",
[(2, 2, 2),
(2, 5, 5),
Expand All @@ -81,7 +79,7 @@ def testMarkovResults(self, k, m, n):
# m = number of Markov parameters
# n = size of the data vector
#
# Values should match exactly for n = m, otherewise you get a
# Values *should* match exactly for n = m, otherewise you get a
# close match but errors due to the assumption that C A^k B =
# 0 for k > m-2 (see modelsimp.py).
#
Expand All @@ -108,7 +106,10 @@ def testMarkovResults(self, k, m, n):
Mcomp = markov(Y, U, m)

# Compare to results from markov()
np.testing.assert_array_almost_equal(Mtrue, Mcomp)
# experimentally determined probability to get non matching results
# with rtot=1e-6 and atol=1e-8 due to numerical errors
# for k=5, m=n=10: 0.015 %
np.testing.assert_allclose(Mtrue, Mcomp, rtol=1e-6, atol=1e-8)

def testModredMatchDC(self, matarrayin):
#balanced realization computed in matlab for the transfer function:
Expand Down Expand Up @@ -219,4 +220,3 @@ def testBalredMatchDC(self, matarrayin):
np.testing.assert_array_almost_equal(rsys.B, Brtrue, decimal=4)
np.testing.assert_array_almost_equal(rsys.C, Crtrue, decimal=4)
np.testing.assert_array_almost_equal(rsys.D, Drtrue, decimal=4)

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