Re: Re: PLS Advise, Highlighted Text from a Query

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what about the percentage how much accurate the result returned??

I'm not sure what kind of keywords or text you're searching, but here's the algorithm i used a while back, for plain-text search: given: $query $text /* curve() maps values between 0 and 1 to.. a curve: 0% -> 0% 25% -> 43% 50% -> 75% 75% -> 93% 100% -> 100% */ function curve($x){ $x = 1 - $x; $x = $x * $x; return 1 - $x; } /* given a number between 0 and +INFINITY, strength returns a value between 0 and 1 (0% and 100%) the higher $n is, the closer to 1 the result.

0 ->   0%       6 -> 85.7%
1 ->  50%       7 -> 87.5%
2 ->  66.6%     8 -> 88.8%
3 ->  75%       9 -> 90%
4 ->  80%      19 -> 95%

5 -> 83.3% 100 -> 99% */ function strength($x){ return ($x / ($x + 1)) } $count = 0 $keywords = (split $query into array of whole words) for (each word in $query) { $n = (number of times $word found in $text); // add the size of $word to $count, or more depending on $n $count += (length of $word) * (1 + strength($n)); } $score = ($count + $count) / (length of $query + length of $text ); $score = curve($score); // repeat a few times if needed, to get decent scores and there you have it. ------------------------------------- mikon