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fix complex -> real error messages #1086

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Merged
merged 1 commit into from
Dec 31, 2024
Merged

fix complex -> real error messages #1086

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7 changes: 3 additions & 4 deletions control/xferfcn.py
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Original file line number Diff line number Diff line change
Expand Up @@ -991,8 +991,6 @@ def _common_den(self, imag_tol=None, allow_nonproper=False):

denorder: array of int, orders of den, one per input



Examples
--------
>>> num, den, denorder = sys._common_den() # doctest: +SKIP
Expand Down Expand Up @@ -1076,7 +1074,7 @@ def _common_den(self, imag_tol=None, allow_nonproper=False):
# create the denominator matching this input
# coefficients should be padded on right, ending at maxindex
maxindex = len(poles[j])
den[j, :maxindex+1] = poly(poles[j])
den[j, :maxindex+1] = poly(poles[j]).real
denorder[j] = maxindex

# now create the numerator, also padded on the right
Expand Down Expand Up @@ -1106,7 +1104,8 @@ def _common_den(self, imag_tol=None, allow_nonproper=False):

# numerator polynomial should be padded on left and right
# ending at maxindex to line up with what td04ad expects.
num[i, j, maxindex+1-len(numpoly):maxindex+1] = numpoly
num[i, j, maxindex+1-len(numpoly):maxindex+1] = \
numpoly.real
# print(num[i, j])

if havenonproper:
Expand Down
54 changes: 11 additions & 43 deletions examples/cruise.ipynb
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