: Yes, actually: 1 / sqrt((1 - Slope) * Pivot + (Slope) * Doclen) interesting ... it doesn't really seem like there is any direct relationship between your average length (Pivot) and your Doclen -- on the surface when i first read your example it seemed like it has more to do with the shifting of the curve then any intrinsic property of the docs themselves and how their lengths related to the pivot.
in my mind the key question is how the length norms of docs are afected when they are equal distant from the pivot (one high one low) ... in theory you want the relative differnece in length norm to be the same regardless of what the average length (ie: if the pivot is 100 the lengthNorm ratio of a 90 word doc vs 110 word doc should be the same as between a 900 word doc and a 1100 word doc if the pivot is 1000 right .. and once you actually do the path, this equation seems to satisfy it. (which really confused me for about 10 minutes, but i'll go with it) However ... i still think that if you realy want a length norm that takes into account the average length of the docs, you want one that rewards docs for being near the average ... it doesn't seem to make a lot of sense to me to say that a doc whose length is N% longer longer then the average length is significantly worse the docs whose length is N% shorter then the average length. -Hoss --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
