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Old Sep 29, 2011, 12:40 PM
Don Harban
Don Harban
Guest
n/a Posts
Re: F3J Flight Matrix Calculations

I've been looking at a glider scoring program developed by an Aussie
and widely used for nearly every kind of comp there and in Europe. I
am on the road right now, and cannot remember the source. But it has
Avery sophisticated matrix routine which appears to be effective for
nearly any number of contestants and flight groups. It is a complete
scoring program, facilitating such things as throw outs, reflies and,
of course frequency conflicts.

It will generate flight matrices, score cards and round-by-round
results. It will score teams and resolve team conflicts within
rounds. It is a stand alone, not requiring excel or anything like
that.

In dealing with matrices it will not only create the matrices, but it
will furnish a ton of statistical information on the matrices that it
forms and allow unlimited retries (with statistical breakdowns) until
you are satisfied.

If you are interested I will furnish more information when I get home.

Happy Landings,

Don

On Sep 29, 12:22 pm, <m...@themapsmith.com> wrote:

> Jim, try gliderscore here... http://absupply.net/hafele-29002701-...uspension.aspx
>
>  
>
> Joe Wurts says it does a pretty good job of getting a non random, evenly distributed flight matrix developed.  He says that it uses a program similar to one he designed to do just what you are attempting to do.  Goal should be to get each pilot to fly against other pilots an even amount of times.  So the software has to check for previous pilot matches and throw out recurrances.
>
>  
>
> Hope this helps.  You could contact Joe directly, but I only have his RCGroups contact.
>
>  
>
> Cheers,
>
>  
>
> Mike 
>
>  
>
> -------- Original Message --------
> Subject: [RCSE] F3J Flight Matrix Calculations
> From: "Jim Monaco" <jimsoars@earthlink.net>
> Date: Thu, September 29, 2011 10:15 am
> To: <rcse@googlegroups.com>As many of you know I regularly run F3J events and handle all the matrix and scoring tasks.  In the past I have always generated the flight matrix using a random assignment and rarely have any complaints.  However, I am now looking at generating the fairest possible matrix for the US F3J Team Selections and have run a number of tests and often see anomalies in the matrix where a pilot flies against another an inordinate number of times or very few times.  I ain't the sharpest pencil in the box, so I could use some suggestions on how to improve the matrix from some of the smart math people in the group.  I am a programmer so if I understand the algorithm I can program it.. :)
>
>  
>
> Here are the constraints:
>
> 1.      There are 10 teams
>
> 2.      Each team consists of 4 pilots (if there are less than 4 pilots a BYE will fill the empty slots).
>
> 3.      Each pilot will fly once in a round (so there are 4 groups in a round)
>
> 4.      Pilots on the same team are protected and will never fly against another team member.
>
> 5.      We will schedule 24 total rounds in the matrix
>
>  
>
> Here is what I have attempted so far:
>
> 1.      Pure random – for each round I process each team.  On each team every pilot has a fixed pilot number between 1 and 4 (including BYES). I then compute a random sequence of the position numbers 1-4 and assign the flight group based on that sequence. Repeat for each team.  When all teams have been computed for a round I go on to compute the next round.
>
> 2.      Random with statistical preference – I do the above, but I calculate a factor to use in determining the variance in the matrix and run 1000 trials and select the one with the least variance.  To do this I compute and record how many time each pilot flies against the other pilots.  For each pilot I compute the standard deviation of these numbers.  I then add all the pilots standard deviations together and compute the average standard deviation for the entire matrix.  I pick the matrix that generates the lowest standard deviation in 1000 trials.  Generally I see a minimum standard deviation of about 1.28.  Some individual matrix SDs are 1.9 or so.
>
> ...
>
> read more »


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