Re: Matlab to Octave - precision and differential equations

[Sergei Steshenko]

--- On Fri, 10/1/10, Doug Stewart <address@hidden> wrote:

> From: Doug Stewart <address@hidden>
> Subject: Re: Matlab to Octave - precision and differential equations
> To: "fork" <address@hidden>
> Cc: address@hidden
> Date: Friday, October 1, 2010, 11:57 AM
> On Fri, Oct 1, 2010 at 2:06 PM, fork
> <address@hidden>
> wrote:
> > Doug Stewart <doug.dastew <at> gmail.com>
> writes:
> >
> >>
> >>
> >> What do you mean by "double  precision limitation
> of Matlab" ???
> >
> > I assume the OP meant how many bits are stored in a
> double (53 according to the
> > wiki article: 
> > http://en.wikipedia.org/wiki/Floating_point#Internal_representation)
> >
> > Perhaps the question should be "does octave have a
> quad datatype?"
> >
> > Additionally, I would wonder if the OP's data is ill
> conditioned.
> >
> > _______________________________________________
> > Help-octave mailing list
> > address@hidden
> > https://www-old.cae.wisc.edu/mailman/listinfo/help-octave
> >
> 
> >From :   Rampal Etienne
> Dear Doug,
> 
> I mean that Matlab is only precise up to 16 digits. I need
> higher precision
> for my purposes.
> 
> Kind regards,
> 
> Rampal Etienne
> 
> _______________________________________________
> Help-octave mailing list
> address@hidden
> https://www-old.cae.wisc.edu/mailman/listinfo/help-octave
> 

You rather probably need a different numerical method.

Regards,
  Sergei.