[caballero]

I'll reply here DCEBB, Blazelore's thread (http://www.operationsports.com/forum...rs-ps3-32.html) isn't really appropriate for that.

Quote: Originally Posted by DCEBB2001

I take great offense to be lumped into the same sentence as Donny Moore, who I am sure took no effort to incorporate kinematics and calculus into finding out how fast NFL players really are

huh, did you forget who I am, DCEBB? you DID use SPD=40 time, and only when PGaither and I pointed out to you Donny used that too (at least to a degree), you decided to search other methods, see red part below.

Quote: Originally Posted by DCEBB2001

take a new approach to how players are rated. You can thank caballero and PGaither for getting on my case about that. The whole thing that limited it in the first place was the lack of data to show a true acceleration curve and top velocity. However, once I found out that ALL players in Madden regardless of SPD/ACC stop accelerating at 45 yards I found that I was able to use the split times for each player to measure the change in velocity (ACC) and predict the top instantaneous velocity (SPD) at 45 yards using a cubic function. Now it is just a matter of finding an easy way of doing it for some 20000 players, which should take a few weeks to complete

(post 936 page 94 of this thread)

Quote: Originally Posted by DCEBB2001

I do NOT use the 40 yard dash time to calculate the SPD rating. The SPD and ACC ratings work together to get the desired outcomes. All players have been rated according to the cubic functions of the runs and compared to the entire population regardless of position. I take great offense to be lumped into the same sentence as Donny Moore, who I am sure took no effort to incorporate kinematics and calculus into finding out how fast NFL players really are. From all of the time I spent this offseason trying to find the best way to get these numbers accurate with the available data, the result you find on the website is the best I can do with only a finite number of data points. I am certain that the methodology, which can be easily repeated, is sound and anyone studying kinematics with the same data would yield the same results. I used my connections from grad school to get the best opinions I could, sometimes using my own funds (time for some of these people was not cheap) to get the most logically valid and sound results I could. If someone can do it better, that's great because it will progress the science behind understanding the game. As for now, however, this seems to be the best we can do with what we presently have. I don't recall ever using Bolt's data to use against the population of NFL players as well. I do recall attempting to figure out how fast he would cover his splits, but I never used that as a comparison against the rest of the NFL population in the ratings. Once Bolt becomes and NFL player and runs a 40 with all of the split times accounted for, then we will see how he matches up. Bolt, however, is a different runner than that of an NFL player. Most NFL players reach their maximum velocity around the 30-35 yard mark of the 40 yard dash. Bolt reaches his maximum velocity around the 60-80m mark of his 100m dash. Football players and 100m sprinters require very different running techniques. For football players, you want to go as fast as you can as quickly as you can. For the 100m, it is about maintaining the top velocity for as long as you can (speed endurance). All I ask is that you ask me first about what I did/didn't/forgot to do before simply assuming that I did/didn't/forgot. It comes off as a tad presumptuous and slightly unfair, in my humble opinion.

I'm just going by what you said to me here, man...

a) you never followed up on the SPD thread so I didn't know you choose cubic functions.

b) you talked yourself of a 1 pt regression in SPD each 4 years:

Quote: Originally Posted by DCEBB2001

Using my scale for the 40 and correlating SPD ratings, a player will typically lose 1 SPD point over the course of every 4 seasons after being drafted.

post 66: http://www.operationsports.com/forum...post2043946314

c) As for Bolt, you remember we calculated his splits and approximate 40 time and he timed at 4.10/4.11.
I would have liked (even though he'll probably never play in the NFL) to have the SPD attribute be ranked based on his cubic function.
Now I understand you won't incorporate him, but could you please let me know if he was a 99 SPD, what would the next NFL player be or follow up on this thread: http://www.operationsports.com/forum...-flawed-3.html
?