Was margin of error of shots ever charted?
- Thread starter CueAndMe
- Start date
Wouldn't that be impossible to do due to wouldn't it be different for every person?
Have you ever checked out Jack Koehler's Science of Pocket Billiards?
https://www.amazon.com/Science-Pocket-Billiards-Jack-Koehler/dp/0962289019
https://www.amazon.com/Science-Pocket-Billiards-Jack-Koehler/dp/0962289019
I totally forgot about that book. I had a copy probably 20 years ago. I forget what was in it. I forget a lot of things these days. Did he rank the shots by pocketing odds?
I guess so, but I'm mainly interested in margin of error.
Yes, I did a simple calculation of required aiming accuracy versus cue ball and object ball placement. For a spot shot your hand placement has to be correct within about 1mm.
Dr. Dave has a plot of corner pocket size versus approach angle and has incorporated that into his plots of relative accuracy required to pocket a ball from various locations and angles. This is table dependent, of course. I'm sure he has plots up somewhere.
So what do you to include the variance from player to player?
Does the pocket size change from player to player?
No but a dozen or so other things do.
Yes. With theory and with experiments. Everything can be found here:
cut shot margin for error resource page
Enjoy,
Dave
What concept of "margin of error" are you talking about that would vary from player to player?
Awesome! Thanks, Dr. Dave and Bob Jewett!
Check out the Pool Shot Analyzer java app, you can get it from the Downloads page of www.cue-md.com.
It give you lots of stats about a shot including error margin. It uses Dr. Dave's plots for pocket size from various approach angles in its calculations.
It give you lots of stats about a shot including error margin. It uses Dr. Dave's plots for pocket size from various approach angles in its calculations.
x2 amazing amount of technical stuff here. if you can gather it all in, more power to you.
I think you are confusing margin of error with error rate. Margin of error is "how much can you "miss" by and still make the shot" while error RATE will incorporate the skills of the player because it is more "how often do you "miss" by enough to miss the shot"
You and I have exactly the same margin for error on the spot shot, for example, but I'd bet your error rate is way way smaller than mine.
Does that help at all?
It is same thing. Koehler just use different term because he want to be as accurate possible. That book is the best!
Cool. Thanks!
Edit: Wow! Excellent little app! It shows how accurate we can be as shooters when we're on. I was practicing a shot the other day that I eventually was making half the time that according to the app has a 0.1 degree cue-ball-to-object-ball margin of error.
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Since the "margin of error allowed" is so small... I find it amazing that players have become so very talented, to overcome that obstacle. Shooting a ball 80 inches away, at a target of 20 thousands of an inch, is so gratifying. Gives us all hope to someday play that well.