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Clarify Speed Columns/Numbers

Posted: Sat Jul 11, 2015 7:33 pm
by jimonline
Hi Martin
Think I understand the speed ratings...,(hopefully)
If you could help with these bits. I've read and get muddled a bit on the explanations.
Are the speed numbers lengths per minute based on start to finish over the filters used.

Do the columns mean
Speed - Best 3 numbers on them filters
Multi - An average rating between the speed and official rating
OR - official rating on filters.
Ran To - last 3 race numbers?

Thanks

Re: Clarify Speed Columns/Numbers

Posted: Sat Jul 11, 2015 10:01 pm
by martinkil
All ratings are dependant on the filters selected, and they are the best three available - using the filters.

The Multi is a combination of the speed and ranto rating I was asked to create many years ago and since users have told me they find them useful I've left them alone. Personally I never use them.

The speed ratings are just that - speed ratings. Exactly how they are calculated are proprietary.

Re: Clarify Speed Columns/Numbers

Posted: Sun Jul 12, 2015 7:44 pm
by DrewH
Martin
Another question which might help - in cases where the Speed figure is negative or zero (eg Solway Dandy in the 12th July 14:00 Perth, which shows the Speed figure for the 2nd July race as -4.9), how reliable do you believe the RanTo figure will be? I've seen a few examples of this - in general I tend to base any decisions on other form indicators if it looks like any of the data is suspect.
Drew

Re: Clarify Speed Columns/Numbers

Posted: Mon Jul 13, 2015 8:07 am
by martinkil
Negative speed figures usually indicate that the race was run very slowly in relations to other races on the day and would definitely make that speed figure suspect. The RanTo is based on relative form of the runners against which he's racing and should still be fine