[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
ode45 gives solution in the "Dark Side," but not in Octave
|
From: |
John W. Eaton |
|
Subject: |
ode45 gives solution in the "Dark Side," but not in Octave |
|
Date: |
Tue, 1 Sep 2009 18:00:18 -0400 |
On 1-Sep-2009, John B. Thoo wrote:
| Hi. I have a question about using ode45 in Octave 3.2.2 (and OdePkg
| on Mac OS X 10.4.11) vs. in the "Dark Side" 7.4.0 (R2007a) (on a
| server ... Linux?). My code can be found here at the moment:
|
| <http://ms.yccd.edu/~jb2/PickUp/twoway.zip>
|
| "run_twoway.m" executes the code.
|
| Both Octave and the Dark Side solve the problem (i.e., do not return
| an error) to produce a solution u, and both give
|
| > size (u)
| ans =
|
| 8192 102
|
| However, while I can plot the solution in the Dark Side, in Octave I
| can plot only the first four frames. In fact, in Octave I get NaN +
| 0.00000i from u(:,5) on. Why is that?
|
| I would appreciate any hints. Thanks.
Have you tried using lsode in Octave instead of ode45 (which is not
part of Octave, BTW).
jwe