Go Back   Pace and Cap - Sartin Methodology & The Match Up > General Discussion
Mark Forums Read
Google Site Search Get RDSS Sartin Library RDSS FAQs Conduct Register Site FAQ Members List Search Today's Posts

General Discussion General Horse Racing Discussion

Reply
 
Thread Tools Display Modes
Old 10-31-2021, 09:49 PM   #81
ranchwest
Grade 1
 
Join Date: Mar 2010
Posts: 3,489
If I might ask, what does "CSR" stand for?
ranchwest is offline   Reply With Quote
Old 10-31-2021, 10:18 PM   #82
Lt1
Grade 1
 
Lt1's Avatar
 
Join Date: Apr 2012
Location: Valley Stream NY
Posts: 9,041
RW it stands for composite speed rating and is comprised of the last 4 sr weighted regardless of dist or surface. You can find more info in Micks' RDSS Documentation Section.
Tim
__________________
Trust but verify
Lt1 is offline   Reply With Quote
Old 10-31-2021, 10:23 PM   #83
ranchwest
Grade 1
 
Join Date: Mar 2010
Posts: 3,489
Thanks!
ranchwest is offline   Reply With Quote
Old 11-01-2021, 12:21 AM   #84
Ted Craven
Grade 1
 
Ted Craven's Avatar
 
Join Date: Jun 2005
Location: Nanaimo, British Columbia, Canada
Posts: 8,853
Here you go:

"CSRComposite Speed Rating. A weighting of the RDSS Adjusted Speed Rating from the last 4 usable lines, regardless of distance, surface, race conditions or finish. The weighting is as follows: 100% of the last line SR + 62% of the average of the last 2 lines SR + 38% of the average of the last 3 lines SR + 24% of the average of the last 4 lines SR. Thus the last line SR has a major weighting in the CSR, with the weighting declining for older lines. "

Also - " if you use CSR, and you judge that it is compromised by clearly troubled or excusable low Speed ratings in the last 4 lines (more affected by the last 2 lines), you can recompute the CSR by clicking on its value in the Horse Header screen. The LOWEST rating in the last 4 is removed and the remaining Top 4 are used in a recalculation. (There are better ways to accomplish this, and will be in future, AND if you do more than 1 horse in a race, previous recalculations are lost – but that said, if you use CSR for a measure of consistency, and Top 5 rankings matter, and it is a component in Rx – then feel free to touch up CSR by hand if you like)."

RDSS Documentation -

http://rdss2.com/V2.1-docs-pdf
http://paceandcap.com/forums/showthread.php?t=13336

Ted
__________________

R
DSS -
Racing Decision Support System™
Ted Craven is offline   Reply With Quote
Old 11-01-2021, 01:24 AM   #85
ranchwest
Grade 1
 
Join Date: Mar 2010
Posts: 3,489
What if a horse has fewer than 4 starts?
ranchwest is offline   Reply With Quote
Old 11-01-2021, 03:33 PM   #86
Ted Craven
Grade 1
 
Ted Craven's Avatar
 
Join Date: Jun 2005
Location: Nanaimo, British Columbia, Canada
Posts: 8,853
We use the same progressive weighting described above for however many lines there are (up to 4 last usable lines, unless skipping the lowest of the last 4 as described).


Ted
__________________

R
DSS -
Racing Decision Support System™
Ted Craven is offline   Reply With Quote
Old 11-01-2021, 05:46 PM   #87
ranchwest
Grade 1
 
Join Date: Mar 2010
Posts: 3,489
Quote:
Originally Posted by Ted Craven View Post
We use the same progressive weighting described above for however many lines there are (up to 4 last usable lines, unless skipping the lowest of the last 4 as described).


Ted
So, you sort of extend it out as if there were the same number of races as the other horses? Or does the horse with, say, two races show a lesser number based on his inexperience?
ranchwest is offline   Reply With Quote
Old 11-01-2021, 06:20 PM   #88
Ted Craven
Grade 1
 
Ted Craven's Avatar
 
Join Date: Jun 2005
Location: Nanaimo, British Columbia, Canada
Posts: 8,853
I was probably not too clear, sorry! For geeks and formula wranglers -


CSR:
For 4+ races, we use 100% of line 1 SR + 62% of (line1+line2)/2 + 38% of (line1+line2+line3)/3 + 24% of (line1+line2+line3+line4)/4

For 3 races, we use 100% of line 1 SR + 62% of (line1+line2)/2 + 38% of (line1+line2+line3)/3 + 24% of (line1+line2+line3)/3

For 2 races, we use 100% of line 1 SR + 62% of (line1+line2)/2 + 38% of (line1+line2)/2 + 24% of (line1+line2)/2

For 1 race, we use 100% of line 1 SR + 62% of line1 + 38% of line1 + 24% of line1

100-62-38-24% is a Fibonacci progression (an organization of natural and mathematical phenomena). Works for me ...

It's a smoothing and averaging of recent lines which conceptually depends on how useful the Adjusted Speed Rating concept itself is - i.e. the distance equalization adjustments, the daily-track and inter-track adjustments and the surface to surface adjustments turf/dirt/poly (which is really just another track to track adjustment).

Of course no set of adjustments is perfect, hence the minimal ability to exclude one low rating (especially in Top 2) which disproportionately affects CSR. But this concoction seems to have pretty good legs, especially when married with other ratings, and especially with other non-correlated ratings (e.g. an oddsline built of not only speed/pace/deceleration factors, but also positional pace, class, public ratings like Prime Power/Profit Line/Morning Line -- and public tote odds --> hence Rx).

Hope that helps.

Ted
__________________

R
DSS -
Racing Decision Support System™

Last edited by Ted Craven; 11-01-2021 at 07:55 PM. Reason: clarify re excluding 1 low rating & 'non-correlated' importance
Ted Craven is offline   Reply With Quote
Old 11-01-2021, 07:04 PM   #89
ranchwest
Grade 1
 
Join Date: Mar 2010
Posts: 3,489
Yes, it does help. That's pretty much how I envisioned it should be done based on your basic premise. Okay, I have admitted my geek. lol
ranchwest is offline   Reply With Quote
Old 11-06-2021, 04:33 PM   #90
derrick24948
AlwNW1X
 
Join Date: May 2021
Posts: 15
Thanks Tim, I appreciate the info!
derrick24948 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Rmath's contender elimination using CSR rankings lone speed RDSS2 / FAQ's 7 08-28-2022 03:00 AM
Race using Rmath's method shoeless Previous 'Handicapping Discussion' Forum 23 12-31-2012 04:30 PM


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.

All times are GMT -4. The time now is 06:18 PM.