Re: Directed rounding

[Eric Walter]

Dear Oliver,

Yes, this might be the way. In MATLAB I got around my rounding problem 
by using Sigfried Rump's interval toolbox INTLAB. Many thanks for your 
suggestion, and thanks to the Octave community for their amazing reactivity.

Best regards,

Eric

Le 17/09/2015 18:25, Oliver Heimlich a écrit :
> On 17.09.2015 18:21, Eric Walter wrote:
> > As I told you in my previous email, my goal was just to point out what
> > would, in my opinion, be a desirable Octave feature. I do not plan to
> > implement it myself.
> >
> > Many thanks for the time you took to answer me and for your suggestions.
> > Many somebody else will feel like doing the job.
> >
> > Best,
> >
> > Eric
>
> Eric,
>
> you may install the interval package with
>
> octave:1> pkg install -forge interval
> octave:2> pkg load interval
>
> Then you can access a function called “__setround__”. See “help 
> __setround__” for instructions.
>
> You might also be interested in the function @infsup/nextout to 
> produce the next higher and next lower floating point numbers.
>
> http://octave.sourceforge.net/interval/function/@infsup/nextout.html
>
> Best regards
> Oliver