OpenEuphoria

Re: Calculating with imprecise values

• Posted by Juergen Luethje <j.lue at gmx.de> Dec 14, 2005
• 619 views

Matt Lewis wrote:

> Juergen Luethje wrote:
> > 
> > Matt Lewis wrote:
> > 
> > <snip>
> > 
> > > It sounds like fuzzy numbers and fuzzy arithmetic.  I've thought about
> > > writing something to do this, but haven't yet...
> > 
> > I'm not sure whether I understand the meaning of the expressions "fuzzy
> > numbers" and "fuzzy arithmetic" correctly. 
> > I do not mean what is called "Fuzzy Logic" (according to Lotfi Zadeh and
> > others) -- although I considers that very useful. 
> > 
> > What I mean ATM is something that I think has got to do with "error
> > propagation". Please see my reply to "jxliv7" for details.
> 
> I think that Fuzzy numbers and arithmetic could be used for this, 
> although it could be overkill.  Here are a couple of so-so links to
> get you started:
> 
> <a
> href="http://whatis.techtarget.com/definition/0,,sid9_gci283979,00.html">http://whatis.techtarget.com/definition/0,,sid9_gci283979,00.html</a>
> 
> Mathematica documentation on fuzzy arithmetic, which gives some
> visuals that might help:
> <a
> href="http://documents.wolfram.com/applications/fuzzylogic/Manual/9.html">http://documents.wolfram.com/applications/fuzzylogic/Manual/9.html</a>
> 
> 
> If you have good tolerance for reading math, this looks like a good 
> paper that covers the basics, and has other interesting stuff:
> 
> <a
> href="http://www.nist.gov/msidlibrary/doc/pfn-fss.pdf">http://www.nist.gov/msidlibrary/doc/pfn-fss.pdf</a>

Very interesting, thank you!
If I were able to write an Eu library for Fuzzy Arithmetic, I probably
could/would/should ask my boss tommorrow to double my salary. 

Regards,
   Juergen