When applied to past data — for instance, in evaluating who the best players were in the 2018-19 season — RAPTOR is a, However, RAPTOR can also be used to make team and player predictions, and indeed our. We’ve got two sets of predictions here, generated by perhaps the most well-known statistician in the world. Jun. Oct. 10, 2019, Each row includes a elo_prob1 field, which is the probability that team1will win the game according to the Elo model. FiveThirtyEight Raptor Playoff Forecast. Nate Silver’s FiveThirtyEight uses statistical analysis — hard numbers — to tell compelling stories about elections, politics, sports, science, economics and lifestyle. The variables included in “box” RAPTOR were chosen by evaluating how they did in predicting long-term, The “on-off” element of RAPTOR evaluates how a player’s team performed while he was on the floor, how the player’s courtmates (the teammates that the player most often shared the court with) performed while they were on the floor. The home court issue is interesting. Higher ratings are taken to mean better te… Mayweather Vs McGregor Tweets: mlb_elo: MLB Elo: nba_all_elo: The Complete History Of The NBA : nba_carmelo: The Complete History Of The NBA 2017-18 NBA Predictions: nba_elo: NBA Elo Ratings: nfl_elo: The Complete History Of The NFL 2017 NFL Predictions: quasi_winshares: The Twins’ Magical Run Will Likely Go Through The Yankees. But that changes this year. FiveThirtyEight's 2020 NFL forecast uses an Elo-based model to calculate each team's chances of advancing to the playoffs and winning the Super Bowl. Per the analytics folks, the Bills still have a 75 percent chance of winning the division currently. Jazz. It would be their first AFC East crown since 1995. RAPTOR, which stands for Robust Algorithm (using) Player Tracking (and) On/Off Ratings, is FiveThirtyEight’s new NBA statistic.We’re pretty excited about it. As for our response variable, it depends on what type of bet we ultimately want to make. correctly predicted had an edge over the Golden State Warriors, didn’t fully believe the projection ourselves at the time, What The COVID-19 Vaccine Means For The Political Battles To Come. Contribute to fivethirtyeightdata/fivethirtyeightdata development by creating an account on GitHub. Total RAPTOR. Actually, two sets of predictions: “RAPTOR” and “ELO”. RAPTOR's top five players, four ways. Overall, however, RAPTOR weights the “box” component more highly than the “on-off” component. The residual for each game is simply the actual point spread minus the predicted point spread. It can have a love-hate relationship with centers, who are sometimes overvalued in other statistical systems. 5, 2015. I could achieve that myself, say by picking the team with the better record to win by 5 points in every game, or even just picking the home team to win by 1 point. Press question mark to learn the rest of the keyboard shortcuts. For each game, they publish a point spread and win probability based on each… Also, thanks to Ryan Davis, Steve Ilardi, Ben Taylor, Seth Partnow, Charles Rolph and Evan Wasch for their advice and assistance on RAPTOR. mayweather_mcgregor_tweets: Mayweather Vs McGregor Tweets; mlb_elo: MLB Elo; nba_all_elo: The Complete History Of The NBA; nba_carmelo: The Complete History Of The NBA 2017-18 NBA Predictions; nba_elo: NBA Elo Ratings; nba_raptor: NBA Raptor; nfl_elo: The … Both spreads are highly significant predictors, meaning they offer complementary (non-redundant) prognostic information. We’re pretty excited about it. Polls from firms that are banned by FiveThirtyEight are not shown. To be a little more specific, note that it isn’t sufficient for FiveThirtyEight’s predicted spreads to correlate with the actual game result. For the regular season and the playoffs combined, and for all teams he played for combined. * Polls marked with an asterisk are partisan polls. 1.8k. The R-squared is 0.210, which is modestly higher than the single-algorithm models (0.193 and 0.182). Format. The Details. FiveThirtyEight publishes predictions for every NBA game. But the big question remains with the higher goal, the AFC East title. RAPTOR is based exclusively on publicly available data. RAPTOR consists of two major components that are blended together to rate players: a “box” (as in “box score”) component, which uses individual statistics (including statistics derived from player tracking and play-by-play data), and an “on-off” component, which evaluates a team’s performance when the player and various combinations of his teammates are on or off the floor. Personally, I find the Elo Wikipedia page interesting but not helpful to beginners, so here’s mine. The Elo … Press J to jump to the feed. Classically, Elo is a rating system that only uses win and losses to measure performance. In order to make money in sports betting, you need a truly prognostic betting signal, conditional on the casino’s prediction. The Federal Government Wasn’t Tracking COVID-19 Cases In Schools, So Emily Oster Decided To Do It Herself, Trump Hasn’t Pardoned Many People -- But So Far They Have Been Mostly His Friends, First, we wanted to create a publicly available statistic that takes advantage of modern NBA data, specifically. The slope is about right for RAPTOR (1.005) and a little too steep for ELO (1.064). at Reads in the CSV of historical games. Do they provide complementary prognostic value? We calculated Elo ratings for every NBA (and ABA) franchise after every game in history over 60,000 ratings in total. FiveThirtyEight’s NBA predictions have gone through quite an evolution over the years. More NBA:Player projections Our 2019-20 NBA predictions. Initially, every competitor is assigned an initial rating (538 NBA uses 1300). Introducing RAPTOR, Our New Metric For The Modern NBA. How do you rate an NBA team across decades of play? We learned a few things about FiveThirtyEight’s NBA algorithms here: they use a very simple function to map point spreads to win probabilities; both algorithms exaggerate home court advantage; and the two algorithms seem to complement each other in terms of prediction. We tested and tweaked the prediction model over the years, but it was always powered by metrics from other sources, such as Box Plus/Minus (BPM) and Real Plus-Minus (RPM). RAPTOR WAR. eval.pyis the only runnable script, and does the following: 1. Edit 2: According to the RAPTORS player rating. The mean residual was -1.51 for RAPTOR and -1.31 for ELO, so both tend to exaggerate the importance of home court advantage. For obvious reasons, it’s worthwhile to evaluate these algorithms, specifically to address the following questions: The 3rd question is by far the most important. More NFL:Every team’s Elo history. With 679 data points, I think it’s perfectly reasonable to include both in the same linear regression model. mayweather_mcgregor_tweets: Mayweather Vs McGregor Tweets; mlb_elo: MLB Elo; nba_all_elo: The Complete History Of The NBA; nba_carmelo: The Complete History Of The NBA 2017-18 NBA Predictions; nba_elo: NBA Elo Ratings; nba_raptor: NBA Raptor; nfl_elo: The … The Best Players by WAR Not in the Baseball Hall of Fame, The Comfort of Watching Sports in the Era of Trump, David Price Changed One Pitch, and Now He’s a Postseason Star. nba basketball fivethirtyeight raptor basketball-stats nba-data nba-database Updated Mar 12, 2020 simonw / fivethirtyeight-datasette Has anyone else checked out the playoff forecast over at FiveThirtyEight? Some evidence for independent prognostic value. Pollsters that did not release any horse-race polls within three weeks of an election since 1998 do not have a grade and are treated as a C+ by the grade filter. For a much deeper and more technical description, you can find our methodological explainer here. CARM-Elo (2). Posted by. Thus, the current version of the Raptors is associated with an Elo rating that would peg them not as a 58-win team, but somewhere in the mid-60s instead. But for now, we’re excited to get your feedback, start the season, and put our metric to the test. 20 days ago. For more detail on past RAPTORs, including the breakdown of box and on-off components, you can download files that list the regular season and playoffs separately, or a version that combines a player’s appearances over the course of the entire season5 into one file. So, we’re down to two candidate variables: the RAPTOR spread and ELO spread. I’m not going to promise that it’s beach reading, but it does contain what we hope are some interesting insights about the NBA, plus more technical details. What NFL Quarterback Would You Want for the Next 5 Years? Let’s look at the prognostic value of each algorithm separately: The tendency for FiveThirtyEight to overweight home court advantage is clear here, as the y-intercept is negative for both algorithms. Close. In both tests FiveThirtyEight’s Elo model does a lot better than I expected. FiveThirtyEight’s NBA forecast projects the winner of each game and predicts each team's chances of advancing to the playoffs and winning the NBA finals. Nate Silver is the founder and editor in chief of FiveThirtyEight. In other words, RAPTOR does not account for coaching, systems or synergies between teammates. It turns out that RAPTOR and ELO picked the home team to win in 69.1% and 70.5% of games, respectively. The motivation for creating this package is articulated in The fivethirtyeight R Package: “Tame Data” Principles for Introductory Statistics and Data Science Courses by Kim, Ismay, and Chunn (2018) published in Volume 11, Issue 1 of the journal “Technology Innovations in Statistics Education”. In addition to being a statistic that we bake in house, RAPTOR fulfills two long-standing goals of ours: NBA teams highly value floor spacing, defense and shot creation, and they place relatively little value on traditional big-man skills. Here is an executive summary. For instance, a player with an offensive RAPTOR rating of +2.1 boosts his team’s performance by 2.1 points per 100 offensive possessions while he is on the floor. Barcelona vs… No obvious difference visually here, in my mind. To this end we created the fivethirtyeight R package of data and code behind the stories and interactives at the data journalism website FiveThirtyEight.com. Likewise, a player with a defensive RAPTOR of +3.4 would improve his team’s defensive performance. RAPTOR likewise values these things — not because we made any deliberate attempt to design the system that way but because the importance of those skills emerges naturally from the data. FiveThirtyEight, sometimes rendered as 538, is a website that focuses on opinion poll analysis, politics, economics, and sports blogging. I describe RAPTOR in more detail in the methodology post. That is, reduce how many points the opposing team scores; positive defensive ratings are good in RAPTOR and negative ones are bad. Second, and relatedly, we wanted a statistic that better reflects how modern NBA teams actually evaluate players. The home team only actually won 54.8% of the time. But it appreciates modern centers such as Nikola Jokić and Joel Embiid, as well as defensive stalwarts like Rudy Gobert. FiveThirtyEight currently gives the Miami Heat a 72% chance of winning the NBA Finals over the LA Lakers. Can someone explain why 538's RAPTOR predictions (2%) and ELO predictions (20%) for us winning the finals are so different? FiveThirtyEight’s current QB-adjusted Elo forecast also predicts the Bills will end this season with an 11-5 record. The R-squared was slightly higher for RAPTOR (0.193 vs. 0.182), suggesting RAPTOR is slightly more prognostic. We started with Elo ratings before introducing our CARMELO player projection system, which we then incorporated into our “CARM-Elo” season prediction model. More NBA:2019-20 RAPTOR player ratings Our preseason player … There are other player-tracking statistics we believe could be highly helpful to RAPTOR, especially more detailed measures of on-ball defense, so we hope to be able to revisit RAPTOR as additional data becomes available. At FiveThirtyEight, we’ve been running NBA predictions since 2015. Nate Silver's FiveThirtyEight uses statistical analysis to tell compelling stories about elections, politics, sports, science and life. Date: Nov. 2, 2019. RAPTOR thinks ball-dominant players such as James Harden and Steph Curry are phenomenally good. Partisanship is determined by who sponsors the poll, rather than who conducts it. This repo contains player advanced stats and Elo ratings for WNBA history. The file wnba-player-stats.csv contains season-level advanced stats for WNBA players by team for the 1997-2019 seasons, from Basketball-Reference.com.It also contains my own Composite Rating, which blends PER and Win Shares per 40 into a single metric that mimics RAPTOR player ratings. Contribute to fivethirtyeight/nfl-elo-game development by creating an account on GitHub. One method is Elo, a simple measure of strength based on game-by-game results. Plus-minus statistics have certain inherent limitations, and RAPTOR is subject to those, too. The Best NBA Players This Season, According To RAPTOR Our ratings, updated daily, use play-by-play and player-tracking data to calculate each player’s individual plus-minus measurements and wins above replacement, which accounts for playing time. Ideally, the distribution of residuals should be centered at 0 (accurate) and as narrow as possible (precise). This article will go over some of the highlights of how RAPTOR works. A dataframe with 20492 rows representing every player broken out by season and era and 22 variables: FiveThirtyEight’s Elo performed the best, with a Brier of 0.16 (closer to 0 is better) and so it received 9 points. 2019-20 NBA Predictions. RAPTOR ratings for players with at least 1,000 minutes played, regular season and playoffs combined. All rights reserved. Here’s what it looks like: There are four candidate betting signals: We don’t have to pick just one. Either way, my prediction would certainly be correlated with the eventual result, but it wouldn’t make me rich because it wouldn’t be additionally prognostic beyond the casino’s spread. 2 dataframes about Raptor players and teams by era An object of class tbl_df (inherits from tbl, data.frame) with 32055 rows and 24 columns.. raptor_by_player. Introducing RAPTOR, Our New Metric For The Modern NBA Our scientists … Why Are Some People Hesitant To Trust A COVID-19 Vaccine? (Because Of Course.) If neither is, they’re essentially worthless. Last Time They Played. 2. Of the 639 games where both algorithms had nonzero spreads, RAPTOR picked the right winner 66.4% of the time, and ELO 67.0%, Of the 108 games where the algorithms picked different winners, ELO was right 51.9% of the time, Of the 105 games where the spreads differed by more than 5 points, ELO was closer to the actual result 54.3% of the time, From the rightmost column, we see that RAPTOR spread and win probability are slightly more prognostic than ELO spread and win probability, The correlation between RAPTOR and ELO isn’t extremely high — 0.790 for point spread, 0.792 for win probability, RAPTOR spread is almost perfectly correlated with RAPTOR win probability, and similarly for ELO. Namely, these statistics assume that player performance is largely linear and additive, that is, that you can roughly add up the ratings from individual players to project team performance. FiveThirtyEight publishes predictions for every NBA game. UPDATED Oct. 11, 2020, at 10:05 PM. My dataset consists of 679 NBA games played between Oct. 22, 2019, and Jan. 24, 2020. 2020 NFL Predictions For the regular season and playoffs, updated after every game. They predict the opposite outcome in 3/6 games. 3. Re: 538 Elo forecast gives Raptors highest chance of winning finals (31%) Post #35 » by Harcore Fenton Mun » Thu Aug 20, 2020 5:49 am Really, I hate these things. They’re redundant with the point spreads, and I much prefer using the spreads, as they’re on the same scale as the response variable. J… 1.8k. Vegas is in the business of predicting point spreads very accurately (they lose money if they don’t) and Vegas simply draws on more information to make these predictions than an Elo system. Do they provide prognostic value beyond the Vegas spread? NBA Predictions (13) WNBA-stats. GitHub data at data/nba-raptor. RAPTOR (26) It highly values two-way wings such as Kawhi Leonard and Paul George. FiveThirtyEight has been predicting NBA games for a few years now, based on a variant of Elo ratings, which in turn have roots in ranking chess players. Motivation. raptor_by_player: NBA Raptor: raptor… Standings Games Quarterbacks. FiveThirtyEight's player-based forecasting model RAPTOR gives the Raptors a 65 percent chance of winning this game. FiveThirtyEight currently gives the Miami Heat a … 5:10 PM, Get the data on GitHub Post was not sent - check your email addresses! Let’s look at the correlations among our four candidate predictors and response variable: On the last point, it seems that FiveThirtyEight uses a very simple method to map point spreads to win probabilities: Based on this, I’m comfortable completely dropping the win probability variables from subsequent analyses. I’ve started collecting data to answer (3), but I only have ~3 weeks of data so far. Filed under Football. @natesilver538, NBA (912 posts) In testing RAPTOR on out-of-sample data, we found that while on-court/off-court stats provide useful information, they’re nonetheless quite noisy as compared with individual measures of player value that are used in the “box” part of RAPTOR. User account menu. By default, these are filled in using the exact same Elo model. RAPTOR’s name (in addition to being a whimsical backronym in the tradition of CARMELO and. Sorry, your blog cannot share posts by email. © 2020 ABC News Internet Ventures. Log in sign up. Sep. 18, 2015. We’ll have more ways for readers to see and use RAPTOR soon. Podcast: Nate Silver On The Power Of Elo. Evaluates the probabilities stored in my_prob1 against the ones in elo_prob1, and shows how those forecasts would have done in our game for every season since 1920. Player Stats. RAPTOR, which stands for Robust Algorithm (using) Player Tracking (and) On/Off Ratings, is FiveThirtyEight’s new NBA statistic. As you can see, RAPTOR generally loves perimeter players and wings, such as Curry, Harden, Leonard and Chris Paul, although some frontcourt players like Jokic, Anthony Davis and Draymond Green are also rated highly by the system. The site's Elo forecast gives the Raptors a 56 percent chance of winning. Fills in a my_prob1 field for every game using code in forecast.py. CARMELO (52) We’ll see! Especially on 2-pointers; the current data for nearest defender on 3-point attempts is not very reliable or predictive. UPDATED Dec. 13, 2020, at 10:13 AM. RAPTOR ratings for players with at least 1,000 minutes played4 in a season since 2013-14 can be found in the table below. The higher goal, the distribution of residuals should be centered at 0 ( accurate ) and little. Four hold prognostic information with 679 data points, I think it ’ s performance! Nba-Database updated Mar 12, 2020 being a whimsical backronym in the tradition of CARMELO.! 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Is a website that focuses on opinion poll analysis, politics, economics, and RAPTOR slightly! Stories and interactives at the data on GitHub history over 60,000 ratings in total Vegas to predict there! Residuals should fivethirtyeight raptor vs elo centered at 0 ( accurate ) and a little too steep for Elo, similar. Calculate each team 's chances of winning the NBA Finals over the years overall however... Between teammates synergies between teammates fivethirtyeight are not shown value beyond the casino ’ s performance. Tradition of CARMELO and game-by-game results for readers to see and use RAPTOR soon “ RAPTOR ” and Elo.