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[Octave-bug-tracker] [bug #49408] ode{23, 45} option "Refine" has no eff
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From: |
Carlo de Falco |
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Subject: |
[Octave-bug-tracker] [bug #49408] ode{23, 45} option "Refine" has no effect |
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Date: |
Sat, 17 Dec 2016 20:33:39 -0000 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:49.0) Gecko/20100101 Firefox/49.0 |
Follow-up Comment #3, bug #49408 (project octave):
Some experiments with Matlab show that 'Refine'
is ignored also in the following two cases
* only one output is requested (this case is related to bug #49417 )
* tspan has more than two entries
Matlab test for first case:
>> sol = ode45 (@(t, x) -10 * x, [0 1], 1, odeset ('Refine', 3))
sol =
solver: 'ode45'
extdata: [1x1 struct]
x: [0 0.0201 0.1023 0.1807 0.2593 0.3380 0.4166 0.4953 0.5739 0.6525
0.7312 0.8098 0.8950 1]
y: [1 0.8180 0.3598 0.1642 0.0748 0.0341 0.0155 0.0071 0.0032 0.0015
6.6905e-04 3.0481e-04 1.3005e-04 4.5600e-05]
stats: [1x1 struct]
idata: [1x1 struct]
Matlab test for second case:
>> [t, x] = ode45 (@(t, x) -10 * x, [0 .5 1], 1, odeset ('Refine', 3))
t =
0
0.5000
1.0000
x =
1.0000
0.0067
0.0000
>>
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