Re: propagating errors

[Francesco Potortì]

>There is a methodology for this kind of problem called "interval 
>arithmetic".  It calculates intervals in which a computed answer must 
>lie.  There are software packages that implement interval arithmetic, 
>e.g., libraries in C++ and Fortran, extensions and toolboxes in Matlab 
>and capabilities in CASs like Maple.  Also, a free language similar to 
>Octave  called the Euler Math Toolbox has interval arithmetic 
>capabilities.  But, AFAIK, there is no such implementation in Octave.  
>You might check these options before coding your own formulas, which 
>could be a *lot* of work and reinventing the wheel anyway.

Calc, an Emacs package, does interval arithmetic as well.

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