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Re: How Come My Program Won't Work?

From: Carlo de Falco
Subject: Re: How Come My Program Won't Work?
Date: Sun, 13 Mar 2016 11:52:59 +0100

Il 12 mar 2016 11:37 AM, "Doug Stewart" <address@hidden> ha scritto:
> On Sat, Mar 12, 2016 at 5:27 AM, Doug Stewart <address@hidden> wrote:
>> yes with your numbers it is now at 5 min. and still going.
>> try putting in a small number for your zeros
> that did not change  the time!!!!!  wow this is the ode45 doing its work.

There has been a significant improvement in ode45 performance after the move to Octave core.

Can you try comparing this between odepkg under Octave stable and ode45 in the development branch?

That said, when ode45 performs poorly it is often due to a stiff problem being solved, can you try solving with a stiff equation solver?


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