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  #1  
Old September 1st, 2011, 12:45 AM
runnaman
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Default New Rating System

First off, I just ask that if you share this with anyone, please give me credit. I've spent a long time working on it and it still isn't done.

But I would like to share what I have done so far.

If you have any questions or comments please let me know.

Thanks

For Foliage/Difficulty think

1.5: Horning's Highlands
2.5: Willamette Park
3: Adair
4: Milo West
5.5: Trojan ORDGC Layout
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File Type: xls ratings_tweek.xls (15.0 KB, 19 views)
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Last edited by runnaman; September 1st, 2011 at 10:59 PM.
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  #2  
Old September 1st, 2011, 01:38 PM
runnaman
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If you have checked this out, please let me know what you think.

Thanks
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  #3  
Old September 1st, 2011, 03:52 PM
jeverett
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Hi Runnaman,

It looks interesting, although the 'difficulty' field is a bit subjective. You'll probably want to better-define what specifically makes a course a '2' difficulty, for example (e.g. use a rubric or scoring guide), so users of the system can be normed. Also, it doesn't directly take into account a few (in my opinion) important variables. 'Par', for example, is only a rough measurement of the more important hole length and intended number of throws to reach putting range (which is different depending on intended player skill level). It also looks like your rating point increment is directly based off of the 'par' metric.. or roughly what the PDGA does with its Scratch Scoring Average to rating point increment calculation too. What that is only minimally capturing, though, is the scoring spread. Higher SSA (or Par, in your case) is assuming a direct relationship with larger scoring spread, which is not necessarily true. Why not instead actually directly use something derived from the standard deviation of round scores to determine the value of each throw in terms of a rating?
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  #4  
Old September 1st, 2011, 04:01 PM
runnaman
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I understand that the difficulty field is subjective, but I wanted to make a rating system that is based off of the difficulty of the course, not based on what people shoot on it. I feel like basing ratings off of what people shoot can down play good rounds if more than one person shoots it or if the person that shoots it isn't highly rating.

I will work on making the difficulty field less subjective
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  #5  
Old September 1st, 2011, 04:49 PM
Lund
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what would be some local examples of what you might call difficulty/foliage 1-6?
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  #6  
Old September 1st, 2011, 07:11 PM
runnaman
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2 would be like Greenway and 5 is like Milo BSF East. I'm not sure what a 6 would be. Maybe Trojan for the ORDGC.

It still needs work. :P
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  #7  
Old September 1st, 2011, 07:30 PM
NWDiscer
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maybe RR east would rate a 6??

maybe the foliage at Hagg?

those 2 are pretty nasty if you get off the fairway
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  #8  
Old September 1st, 2011, 10:59 PM
runnaman
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I made a couple of changes to the formulas and added a scale on the OP to give you an idea of how to rate courses.

Enjoy and please let me know if you have any comments.
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  #9  
Old September 2nd, 2011, 11:19 AM
runnaman
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Default Projected ratings for the Vibram Open

67 944.62
66 952.89
65 961.15
64 969.42
63 977.68
62 985.95
61 994.21
60 1002.48
59 1010.74
58 1019.01
57 1027.27
56 1035.53
55 1043.80
54 1052.06
53 1060.33
52 1068.59
51 1076.86
50 1085.12
49 1093.39
48 1101.65
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  #10  
Old September 2nd, 2011, 12:19 PM
Hohman
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I'm a little confused as how to use your table, after plugging in the numbers how do I get the rating?
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  #11  
Old September 2nd, 2011, 12:22 PM
runnaman
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strokes are on the left and ratings are on the right.
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  #12  
Old September 2nd, 2011, 12:27 PM
Hohman
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My question is how do I plug numbers in to find my rating for a round

right now it looks as though your ratings are about 4 strokes off.
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  #13  
Old September 2nd, 2011, 12:39 PM
runnaman
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You enter the number of holes and the par. Then you have to enter the difficulty. I gave a few examples in the first post.
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  #14  
Old September 2nd, 2011, 12:55 PM
Hohman
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i figured it out thanks
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