Re: strange problem

[Christoph Dalitz]

On Fri, 28 Nov 2003 02:34:07 -0600 (CST)
Mike Miller <address@hidden> wrote:
>
> > > The number -2.0817e-17 is -0.000000000000000020817, which is very, very
> > > close to zero.
> >
> > Is there an Octave function that truncates/rounds such small numbers to
> > zero (like the Scilab function "clean")?
> >
> > I have tried "help round" and "help trunc", but found nothing
> > appropriate.
> 
> Why not use 'round' but first multiply by a large number, then divide by
> that same number after round.
> 
For some strange reason I believed that there was no "round" function because
it is not documented ("help round" gives "help: sorry, `round' is not 
documented").

> You could write a function that performs that operation on matrices.
> 
Tried this with:

        function y = round(x,n)
          y = round(x*10^n)/10^n;
        endfunction

It seems however that Octave does not support function overloading, because
I obtain the error

        octave:3> round(5.4,0)
        error: round: too many arguments

I am using Octave 2.1.35. Is function overloading supported in some later 
version?

Thanks,

Christoph



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