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Re^3: RFC: A Beginners Guide to Fuzzy Rules-Based Systems

by talexb (Canon)
on Oct 12, 2006 at 14:14 UTC ( #577846=note: print w/replies, xml ) Need Help??

in reply to Re^2: RFC: A Beginners Guide to Fuzzy Rules-Based Systems
in thread RFC: A Beginners Guide to Fuzzy Rules-Based Systems

    About your comment on the $fis->addRule, I am not sure if I understood it. Could you, please, rephrase it?

Your OP contained the following chunk of code:

$fis->addRule( 'quality=bad & speed=slow' => 'award=minimum', 'quality=ok & speed=slow' => 'award=minimum', 'quality=good & speed=slow' => 'award=small', 'quality=excellent & speed=slow' => 'award=small', 'quality=bad & speed=regular' => 'award=minimum', 'quality=ok & speed=regular' => 'award=small', 'quality=good & speed=regular' => 'award=small', 'quality=excellent & speed=regular' => 'award=excellent', 'quality=bad & speed=fast' => 'award=small', 'quality=ok & speed=fast' => 'award=good', 'quality=good & speed=fast' => 'award=good', 'quality=excellent & speed=fast' => 'award=excellent', 'quality=bad & speed=fastest' => 'award=small', 'quality=ok & speed=fastest' => 'award=good', 'quality=good & speed=fastest' => 'award=excellent', 'quality=excellent & speed=fastest' => 'award=excellent', );
and I was wondering if that could be replaced with just an array (in my original post), for prevention of errors and maintainability.

Just a thought.

Alex / talexb / Toronto

"Groklaw is the open-source mentality applied to legal research" ~ Linus Torvalds

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Re^4: RFC: A Beginners Guide to Fuzzy Rules-Based Systems
by lin0 (Curate) on Oct 12, 2006 at 16:55 UTC

    Hi talexb,

    Now, I got it!

    It will be hard to change that particular chunk of code for an array because of the way those statements are treated in the AI::FuzzyInference module (please, see the code below). However, I will think about your idea and see if I can suggest some improvements to the module

    thank you


    # sub addRule() - public method. # # Adds fuzzy if-then inference rules. # # $obj->addRule('x=medium' => 'z = slow', # 'x=low & y=small' => 'z = fast', # 'x=high & y=tiny' => 'z=veryfast'); # spaces are optional. The characters [&=|] are special. sub addRule { my ($self, %rules) = @_; for my $k (keys %rules) { my $v = $rules{$k}; s/\s+//g for $v, $k; push @{$self->{RULES}} => [$k, $v]; } return 1; }

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