|
|
| *SportsComet>>>Fantasy Sports |
What is the formula used to derive the fantasy player rankings in yahoo! fantasy basketball? |
What is the formula used to derive the fantasy player rankings in yahoo! fantasy basketball? The two ranks: "O-rank" is not formula based; it is more like expert opinion. "Rank" is determined by a hard formula, based purely on current stats. Some geek made an attempt to crack the "Rank" formula, and result was 99% good. Though the formula is not straight-forward.... Read on to formula if you're statiscally inclined, but here are the conclusions derived: 1) 9 catagories are counted of course (FG%, FT%, 3ptm, pts, reb, ast, st, blk, to). 2) FG% and FT% are NOT adjusted to the number of attempts. So that means: - Player like Ben Wallace may be underrated; his poor FT% gets penalized in the formula, but in reality he doesn't shoot a lot so it doesn't hurt that much. - some bench guy who shot 100% (like 1 for 1) gets way overrated. 3) FG% and FT% are weighed less to dampen the error mentioned above. That means: - A guy with high percentages and actually takes many FGA and FTA (i.e. Nash) may be underrated a bit. The ranking does not reward enough for his contributions in these two categories. 4) The other 7 categories are weighed roughly equal (though blk, ast, and 3ptm might count slightly more). So other than fg% and ft% extremes, Yahoo ranking can be fairly accurate. --------- Formula - for the stats-inclined (R-square = 99%) All 9 categories are 'normalized' by mean and standard deviation of that category. So you CANNOT plug in the stats directly.... but the coefficients represent how much each cat is weighed. Fantasy production (Note: All cats use standard deviation; not actual stat!!) = 0.43FG% + 0.46 FT% + 1.13(3ptm) + 0.98pts + 0.91reb + 1.10ast + 0.90stl + 1.18blk - 1.00to they dont release the formula. But they have two different ranking, the o-rank and the normal rank. O-rank is the official yahoo rank while normal rank is the rank corresponding with your league stats and how many games they have played. usually the o-rank will take into consideration that a player is good but they are injured. BUt normal rank totals all numbers consistently. From what i'm seeing is a point system. They rank each player that's in fantasy on a 1-XXXXX (how many players are in fantasy). Then they add that all up and they average it over the categories available and you get a total number. Then they rank that total number from the largest number to the smallest. that's why you'll see marion be #1 with 3's/fg/boards/steals/blocks but dirk will be #2 with less 3's/steals/blocks/boards but more assists a significantly higher ft and tons of points they take a combination of all positive and negative stats, work them into games played on packed and slow nights, and average them out. Good Luck!! Hope That Helps!!! they do use a super secret formula. But, if you ask me it's got some problems and I use a variety of sites to rank players. One problem is that 3's seem to be weighted way too heavily. You'll have guys ranked way too high due to the number of 3's made. My other big problem with their rankings is that they don't take into account field goal attempts or free throw attempts. They only consider the percentage itself. In other words, a player who goes 1-1 (100%) gets the same consideration as a player who goes 10-10 (100%). the 10-10 guy will impact your fg% WAY more than the guy that goes 1-1, but yahoo doesn't consider that when ranking. |
| Tags |
| Rugby Union General - Football (Australian) Football (American) Fantasy Sports Cycling Cricket |
Sports Categories--Copyright/IP Policy--Contact Webmaster |