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Thread: Basketball RPI

  1. #21
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    Default Re: Basketball RPI

    How far we drop is still connected more to how our opponents do (50%) than how we do (25%).

    And, a road loss hurts much less than a home loss. They are weighted differently.


  2. #22
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    Default Re: Basketball RPI

    Quote Originally Posted by talktomewillis View Post
    How far we drop is still connected more to how our opponents do (50%) than how we do (25%).

    And, a road loss hurts much less than a home loss. They are weighted differently.
    A loss is a loss, as far as the RPI is concerned. There is no location differential. Now, there is a difference in how it is perceived, but that does not affect the RPI.

  3. #23
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    Quote Originally Posted by VObserver View Post
    A loss is a loss, as far as the RPI is concerned. There is no location differential. Now, there is a difference in how it is perceived, but that does not affect the RPI.

    If it's like baseball, RPI calculation does not care WHO the loss comes to... only if it is home or road.

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    Default Re: Basketball RPI

    Quote Originally Posted by talktomewillis View Post
    How far we drop is still connected more to how our opponents do (50%) than how we do (25%).

    And, a road loss hurts much less than a home loss. They are weighted differently.
    I think the home loss actually hurts more than a road loss. The RPI definitely takes the home/road situation into consideration. While a loss tomorrow would definitely hurt, a loss at Georgia State probably would not be much of a factor as they are doing well right now.

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    Quote Originally Posted by VObserver View Post
    A loss is a loss, as far as the RPI is concerned. There is no location differential. Now, there is a difference in how it is perceived, but that does not affect the RPI.
    This is incorrect.

    For the team that's playing, location means a lot. For RPI purposes, a home win is worth .6 of a win, while a road win is worth 1.3. Conversely a road loss counts as .6 of a loss, but a home loss counts 1.3.

    It's been that way for about four years now.

  6. #26
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    Default Re: Basketball RPI

    Quote Originally Posted by talktomewillis View Post
    This is incorrect.

    For the team that's playing, location means a lot. For RPI purposes, a home win is worth .6 of a win, while a road win is worth 1.3. Conversely a road loss counts as .6 of a loss, but a home loss counts 1.3.

    It's been that way for about four years now.
    I thought the home/road RPI adjustments were in baseball only. I've never seen anything showing that for basketball.

  7. #27
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    Actually, I believe baseball is the one that copied basketball.


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    Default Re: Basketball RPI

    Quote Originally Posted by CajunAmos View Post
    I thought the home/road RPI adjustments were in baseball only. I've never seen anything showing that for basketball.
    This is correct. No home/road adjustments for basketball

  9. #29
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    Default Re: Basketball RPI

    Quote Originally Posted by talktomewillis View Post
    Actually, I believe baseball is the one that copied basketball.
    Thanks. I actually looked it up and found this description on Wikipedia which I assume is correct.

    https://en.wikipedia.org/wiki/Rating_percentage_index

    Basketball formula

    The current and commonly used formula for determining the RPI of a college basketball team at any given time is as follows.

    RPI = (WP * 0.25) + (OWP * 0.50) + (OOWP * 0.25)

    where WP is Winning Percentage, OWP is Opponents' Winning Percentage and OOWP is Opponents' Opponents' Winning Percentage.

    The WP is calculated by taking a team's wins divided by the number of games it has played (i.e. wins plus losses).

    For Division 1 NCAA Men's basketball, the WP factor of the RPI was updated in 2004 to account for differences in home, away, and neutral games. A home win now counts as 0.6 win, while a road win counts as 1.4 wins. Inversely, a home loss equals 1.4 losses, while a road loss counts as 0.6 loss. A neutral game counts as 1 win or 1 loss. This change was based on statistical data that consistently showed home teams in Division I basketball winning about two-thirds of the time.[3] Note that this location adjustment applies only to the WP factor and not the OWP and OOWP factors. Only games against Division 1 teams are included for all RPI factors. As an example, if a team loses to Syracuse at home, beats them away, and then loses to Cincinnati away, their record would be 12. Considering the weighted aspect of the WP, their winning percentage is 1.4 / (1.4 + 1.4 + 0.6) = 0.4117

    The OWP is calculated by taking the average of the WP's for each of the team's opponents with the requirement that all games against the team in question are removed from the calculation. Continuing from the example above, assume Syracuse has played one other game and lost, while Cincinnati has played two other teams and won. The team in question has played Syracuse twice and therefore Syracuse must be counted twice. Thus the OWP of the team is (0/1 + 0/1 + 2/2) / 3 (number of opponents Syracuse, Syracuse, Cincinnati). OWP = 0.3333

    The OOWP is calculated by taking the average of each Opponent's OWP. Note that the team in question is part of the team's OOWP. In fact, the most re-occurring opponent of your opponents is the team in question.

    The RPI formula also has many flaws. Due to the heavy weighting of opponents winning percentage, beating a team with a bad RPI may actually hurt your RPI. In addition, losing to a good RPI team can help your RPI.

  10. #30
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    Default Re: Basketball RPI

    Quote Originally Posted by VObserver View Post
    This is correct. No home/road adjustments for basketball
    I stand corrected

  11. #31
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    Default Re: Basketball RPI

    Quote Originally Posted by CajunAmos View Post
    Thanks. I actually looked it up and found this description on Wikipedia which I assume is correct.

    https://en.wikipedia.org/wiki/Rating_percentage_index

    Basketball formula

    The current and commonly used formula for determining the RPI of a college basketball team at any given time is as follows.

    RPI = (WP * 0.25) + (OWP * 0.50) + (OOWP * 0.25)

    where WP is Winning Percentage, OWP is Opponents' Winning Percentage and OOWP is Opponents' Opponents' Winning Percentage.

    The WP is calculated by taking a team's wins divided by the number of games it has played (i.e. wins plus losses).

    For Division 1 NCAA Men's basketball, the WP factor of the RPI was updated in 2004 to account for differences in home, away, and neutral games. A home win now counts as 0.6 win, while a road win counts as 1.4 wins. Inversely, a home loss equals 1.4 losses, while a road loss counts as 0.6 loss. A neutral game counts as 1 win or 1 loss. This change was based on statistical data that consistently showed home teams in Division I basketball winning about two-thirds of the time.[3] Note that this location adjustment applies only to the WP factor and not the OWP and OOWP factors. Only games against Division 1 teams are included for all RPI factors. As an example, if a team loses to Syracuse at home, beats them away, and then loses to Cincinnati away, their record would be 12. Considering the weighted aspect of the WP, their winning percentage is 1.4 / (1.4 + 1.4 + 0.6) = 0.4117

    The OWP is calculated by taking the average of the WP's for each of the team's opponents with the requirement that all games against the team in question are removed from the calculation. Continuing from the example above, assume Syracuse has played one other game and lost, while Cincinnati has played two other teams and won. The team in question has played Syracuse twice and therefore Syracuse must be counted twice. Thus the OWP of the team is (0/1 + 0/1 + 2/2) / 3 (number of opponents Syracuse, Syracuse, Cincinnati). OWP = 0.3333

    The OOWP is calculated by taking the average of each Opponent's OWP. Note that the team in question is part of the team's OOWP. In fact, the most re-occurring opponent of your opponents is the team in question.

    The RPI formula also has many flaws. Due to the heavy weighting of opponents winning percentage, beating a team with a bad RPI may actually hurt your RPI. In addition, losing to a good RPI team can help your RPI.
    Thanks for the clarification, Amos.

  12. #32
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    Default Re: Basketball RPI

    So does Marlin have more top 25 votes than HUD ever got? If so, dam, who'duh thunk that 3 years ago?


  13. #33
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    Default Re: Basketball RPI

    Quote Originally Posted by VObserver View Post
    I stand corrected
    We should probably play more road games against top 100 teams. A win is a three run homer. Road win, top 100 win, & a pay check.

  14. #34
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    Default Re: Basketball RPI

    Quote Originally Posted by CajunEXPRESS View Post
    We should probably play more road games against top 100 teams. A win is a three run homer. Road win, top 100 win, & a pay check.
    Not sure specifically about next year, but I believe that is the general plan going forward regarding scheduling. On the other hand, RPI is being deemphasized therefore this may not be as much of a factor in the future.

  15. #35
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    UL Basketball Re: Basketball RPI

    SOS & RPI are closely connected. Committee also highly values wins vs better competition and discounts losses to same. You've got to win some. That's why our at large hopes are just that hopes. Strangely if we win the final game we probably jump a P5 team or two in seeding.


  16. #36
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    Default Re: Basketball RPI

    This team isn't letting anyone derail them the Big Dance. I think they will slip up once before the tourney but they won't lose again until the Sweet 16. That's my story and I'm sticking to it.


  17. #37
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    Default Re: Basketball RPI

    Is this one of those scenarios where a loss right now would be good medicine for this team? Or should we just win?


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    Default Re: Basketball RPI

    Quote Originally Posted by Grantvb View Post
    Is this one of those scenarios where a loss right now would be good medicine for this team? Or should we just win?
    Just win. No loss is good medicine.

  19. #39
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    Quote Originally Posted by Grantvb View Post
    Is this one of those scenarios where a loss right now would be good medicine for this team? Or should we just win?
    I don't think these guys need a loss to keep their heads on straight. A lot of maturity and zero overconfidence. They play just as hard up 20 with time expiring as they do at the opening whistle. Absolutely not concerned about overconfidence.

  20. #40
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    Default Re: Basketball RPI

    Quote Originally Posted by Grantvb View Post
    Is this one of those scenarios where a loss right now would be good medicine for this team? Or should we just win?
    If they were straining to do what they are doing a loss would be companied by more losses and a loss of confidence.

    I don't see this team as straining to do what they are doing, I don't think a loss helps to relieve a pressure that isn't there.

    Just do what you been doing. Win!

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