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Re: ode "Mass" and "Jacobian" options


From: Rik
Subject: Re: ode "Mass" and "Jacobian" options
Date: Tue, 4 Feb 2020 16:10:09 -0800

On 02/04/2020 03:54 PM, Bill Greene wrote:
What is an "N-D array"? Do you mean 3 or more dimensions?

Yes, that is the general usage of N-D array in Octave documentation.

As far as I am aware, the Mass matrix must be a 2-D full or sparse matrix.

Okay.  Is the matrix also required to be real and square? 

Thanks,
Rik


On Tue, Feb 4, 2020 at 5:26 PM Rik <address@hidden> wrote:
The ode solver options "Mass" and "Jacobian" can be either a function
handle or a matrix according to odeset().  If it is a matrix, does that
mean a numeric 2-D matrix or just a numeric N-D array?

The input validation for ode15i and ode15s has to be re-done because of a
change in the behavior of str2func, and I'm taking the opportunity to
improve it.

Thanks,
Rik



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