On 12/01/2010 06:00 AM, Isak Delberth Davids wrote:
Dear all,
Do we have a tool that computes error propagation (given "initial"
errors) as variables get computed. I read about a class @meas in
Matlab, but since I do not have Matlab I cannot even teach myself
its use. I am trying to avoid first writing down some tedious
error propagation formulae and then coding them --- or is that my
ultimate choice?
Regards,
Isak
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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.
Thomas Shores
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