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Old Sep 29, 2011, 03:26 PM
Jim Monaco
Jim Monaco
Guest
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RE: Re: F3J Flight Matrix Calculations

Thanks for this pointer. I downloaded the program and I can probably make
it work. I generated a matrix from the test data that he has in there and
the STDDEV is much smaller than the ones I was seeing. Now the magic is to
export the registration and team data from my DB, reformat it to import into
his DB, run the matrix and then export his data and reformat it to import
back into my program. Then I'll run my stats and see if it still looks as
good.



Piece of cake. J



Jim



From: rcse@googlegroups.com [mailto:rcse@googlegroups.com] On Behalf Of
mike@themapsmith.com
Sent: Thursday, September 29, 2011 12:05 PM
To: rcse@googlegroups.com
Subject: RE: [RCSE] Re: F3J Flight Matrix Calculations



And F3J comps as well. It will work for you Jim.



Mike



-------- Original Message --------
Subject: [RCSE] Re: F3J Flight Matrix Calculations
From: Don Harban <misterharban@cox.net>
Date: Thu, September 29, 2011 11:00 am
To: RCSE <rcse@googlegroups.com>



Go to gliderscore.com. I just shook the synapses loose and remembered
the site. The program is already set up to generate the matrices you
described and to specifically score F3K comps.

I've been evaluating it for other uses and will publish an article
about it soon.

Happy Landings,

Don


On Sep 29, 12:40 pm, Don Harban <misterhar...@cox.net> wrote:

> 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-...cabinet-hanger...

>

> >

>

> > 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" <jimso...@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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