Re: Matlab to Octave - precision and differential equations

[Ben Barrowes]

On Friday 01 October 2010 05:59:33 am R.S. Etienne wrote:
> Dear users,
> 
> I have a Matlab code which has problems with the double precision
> limitation of Matlab. I am therefore looking for alternatives,
> particularly those where I don't have to change my code too much, and
> therefore I stumbled upon Octave. Before installing it, I would like to
> know whether Octave has this double precision limitation, or not. Can
> someone please tell me? If it does not have this limitation, then can
> Octave handle ordinary differential equations? I am using Matlab's
> ode45; is there an Octave equivalent, preferably one where the Jacobian
> does not need to be specified?
> 
> Kind regards,
> 
> Rampal Etienne
> 

You could try the multiple precision toolbox at the file exchange. Right now it 
only works with ML 
(just a collection C-mex files, haven't had time to port/test to Octave), but 
if you redefine your 
variables to the new mp class with this toolbox, you can have as much precision 
as you need... at 
the cost of execution speed.

http://www.mathworks.com/matlabcentral/fileexchange/6446