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You also need to make sure that you understand what the data represents, and the RPR is a perfect example of this. When looking at the RPR for todays race, it represents what the racing post ratings method considers to be the horses ability for the race conditions today. When looking at the previous runs, it gets adjusted to reflect the actual performance in the race.

Taking Ginny's Destiny as an example, the last race shows a rating of 142. However, the card produced on the day had Ginny's Destiny rated at 172 and the lower rating applied now reflects the fact that GD came 3rd and was beaten by 13.5 lengths.

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It doesn't mean to say that you can't use the historic data, just that you need to make sure the use case makes sense. If I wanted to identify a difference in RPR that suggested horse A would beat horse B, I wouldn't be able to use the historic data. But if I wanted to calculate an average performance over past runs, the rating being changed to reflect actual performance would be useful in that case.

<blockquote data-quote="NumberCruncher" data-source="post: 2691111" data-attributes="member: 67972">You also need to make sure that you understand what the data represents, and the RPR is a perfect example of this.&nbsp; When looking at the RPR for todays race, it represents what the racing post ratings method considers to be the horses ability for the race conditions today.&nbsp; When looking at the previous runs, it gets adjusted to reflect the actual performance in the race.Taking Ginny&#039;s Destiny as an example, the last race shows a rating of 142.&nbsp; However, the card produced on the day had Ginny&#039;s Destiny rated at 172 and the lower rating applied now reflects the fact that GD came 3rd and was beaten by 13.5 lengths.[ATTACH=full]23840[/ATTACH]It doesn&#039;t mean to say that you can&#039;t use the historic data, just that you need to make sure the use case makes sense.&nbsp; If I wanted to identify a difference in RPR that suggested horse A would beat horse B, I wouldn&#039;t be able to use the historic data.&nbsp; But if I wanted to calculate an average performance over past runs, the rating being changed to reflect actual performance would be useful in that case.</blockquote>

[QUOTE="NumberCruncher, post: 2691111, member: 67972"] You also need to make sure that you understand what the data represents, and the RPR is a perfect example of this. When looking at the RPR for todays race, it represents what the racing post ratings method considers to be the horses ability for the race conditions today. When looking at the previous runs, it gets adjusted to reflect the actual performance in the race. Taking Ginny's Destiny as an example, the last race shows a rating of 142. However, the card produced on the day had Ginny's Destiny rated at 172 and the lower rating applied now reflects the fact that GD came 3rd and was beaten by 13.5 lengths. [ATTACH type="full" size="1115x707"]23840[/ATTACH] It doesn't mean to say that you can't use the historic data, just that you need to make sure the use case makes sense. If I wanted to identify a difference in RPR that suggested horse A would beat horse B, I wouldn't be able to use the historic data. But if I wanted to calculate an average performance over past runs, the rating being changed to reflect actual performance would be useful in that case. [/QUOTE]

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