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Re: Stiff ODEs?

From: Ross Vandegrift
Subject: Re: Stiff ODEs?
Date: Mon, 26 Apr 2004 08:28:25 -0400
User-agent: Mutt/1.3.28i

On Fri, Apr 23, 2004 at 10:18:05AM -0500, John W. Eaton wrote:
> |     Has anyone already implemented ode15s?  How about a stiff DE
> | solver?  A search on google mostly turned up lists of functions Octave
> | is missing.
> Did you think to look in the section of the Octave manual that covers
> differential equations?  There you would find the documentation for a
> fairly complete interface for LSODE, which has a stiff solver option
> and can take advantage of a user-supplied Jacobian or, if it is not
> supplied, compute that information using finite differences.

Ah, no, I actually didn't.  Was depending on Google to find relevent bits
in the manual.  Thanks for the tip.

Would it be valuable to have an lsode wrapper for ode15s?  I was
thinking this morning that it'd be easy to implement, and I may go that
route for the project code I have to write anyhow.  If you'd rather just
keep it at lsode though, then I'll forgo that approach

Ross Vandegrift

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