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Author Topic: • Plus Minus Rating: The Right Definition and Applicability • Evaluación Plus Minus: La Correcta Definición y Aplicación  (Read 435453 times)
BGA Roberto Azar
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« Reply #3 on: Sep 17, 2018, 01:08:44 AM »

Plus Minus Rating: The Right Definition and Applicability
Evaluación Plus Minus: La Correcta Definición y Aplicación


• Plus Minus IS NO Related to Minutes to Play
• Plus Minus NO ESTÁ Relacionado a los Minutos a Jugar


( for the English translation= See Below )

No, NO ES POSIBLE establecer dicha conclusión de ninguna manera: en la misma exposición que Usted leyó en eBA EN-LINEA ( 'El Análisis de la Evaluación Plus Minus' ), está claramente indicado lo siguiente: "Una situación cuando un jugador tiene una calificación NEGATIVA en el campo y POSITIVA mientras está en el banco, NO DEBE  ser ligeramente analizada como que ese jugador debiera haber jugado MAS minutos.

Debemos tener en cuenta, utilizando la Calificación de Plus / Minus que la discusión general sobre esta marca no ha considerado el efecto de la fuerza del oponente, porque la calificación + / - no mide las combinaciones de jugadores oponentes.

Por el otro lado, no existe una forma de distinguir entre jugadores con buenos números individuales pero malos números de equipo, en oposición a jugadores con malas estadísticas individuales pero buenas calificaciones de plus / minus.

Este método estadístico mide como cambia la diferencia de puntos cuando un jugador en particular está en juego en oposición a cuando no lo  está, evaluando la performance del equipo en ambas situaciones.

UNC's Roy Williams is well known by his mass substitutions in the game.
Roy Williams, de los UNC Tar Heels, bien conocido por sus sustituciones en masa en el juego

El Sistema de Calificación puede ser leido y estudiado en mi artículo en la Enciclopedia eBA del Baloncesto.

Retorne a Enciclopedia eBA a leer la exposición una vez más....
Y recuerde: el 'Plus Minus en Baloncesto' es una métrica que analiza cómo los equipos se desempeñan con un jugador determinado en la cancha, cómo ellos se desempeñan con un jugador en la cancha y calcula el impacto general que tiene el jugador en el éxito del equipo. Esto también se refiere a veces como el número de dentrol/fuera del campo de juego.

El Sistema de Análisis Creativo de las Estadísticas del Baloncesto trata de comparar el éxito del equipo con la performance individual, aplicando métodos razonablemente simples.
 
Si queremos aplicar la Calificación de Plus / Minus para sugerir cómo una determinada combinación de jugadores podría actuar en el campo frente a un adversario promedio, nosotros debemos determinar la suma de cada uno de los cinco jugadores. Debemos realizar la suma total de todos ellos y no promediarlos. Entonces al promedio de plus / minus de equipo será necesario agregarle un ajuste, el que es explicado en el Sistema eBA.  
 
Esta temática está ampliamente expuesta en el Libro del Sistema eBA de Estadísticas del Baloncesto con los siguientes ítems:

Tom Izzo and Coachtube


Sobre los Fundamentos;
Sobre la Fórmula;
Sobre los Números;
Comentario;
Libro de Casos de Estudio;
y Fuentes Relacionadas.


Mensaje Actualizado y Aumentado el 17 de Septiembre, 2018

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Plus/Minus Performance Analysis In this image from Winning Hoops presented by eBA Stats Basketball Statistics Analysis .
Image: Winning Hoops

Plus/Minus Performance Analysis

ON THIS CHART: Plus/Minus Performance Analysis Game 7 2001 Eastern Conference Finals. Here is a chart that details the individual plus/minus performances for Game 7 of Milwaukee’s Eastern Conference finals series vs. Philadelphia in which the Bucks lost 108-91.

Examining the plus/minus data for the game several interesting observations can be made:

– As a rule of thumb with plus/minus numbers your star players will generally have a plus/minus rating that mirror the team’s number as a whole. This is usually due to the fact that star players play a lot of minutes per game.

As an example this chart shows that Glenn Robinson’s plus/minus for this game was -17 in 46 minutes of playing time. You’ll notice that Robinson played almost the entire game (48 minutes in a game) and the team lost by 17 points. So in this case Robinson’s plus/minus number is more a reflection of the team’s score (The final game score was 108-91 and the scoring for the time that Robinson played was 106-89).

– When your team gets beaten by a solid margin your team as a whole will probably have very few players with a positive rating.

This chart shows that in this game (a 17 point loss) only three out of the 10 players who played had a positive plus/minus rating and that two out of those three players logged fewer than 2 1/2 minutes of playing time.

– In this game we were missing our power forward Scott Williams from the lineup. It’s interesting to note that Williams happened to be one of the top rated plus/minus guys in the entire NBA in 2001. In the 2000-2001 NBA season there were only five or six players in the entire league who averaged double-digit plus ratings per 48 minutes a game for the season. Williams Portland’s Arvidas Sabonis three players from San Antonio and John Stockton who led the league. (On a side note players on poor teams have a hard time getting good plus numbers due to the fact that their teams are usually behind. In that case you’d want to look at the plus/minus ratings of those players or lineups within the context of their own team.)

We lost four games in the seven-game series and our worst loss came when Williams was out of the lineup (Game 7 108-91). By Terry Stotts, Assistant Coach Milwaukee Bucks Milwaukee Wis


No, it's NO POSSIBLE to state that conclusion at all: in the same exposition you read at eBA ONLINE ( 'The Plus Minus Rating Analysis' ), it is clearly indicated the following: "A situation when a player have a NEGATIVE rating ON court and a POSITIVE while on bench, MUST NOT be lightly analyzed as this player should have been played MORE minutes."

We must take into account, using the Plus / Minus Ratings that the overall debate about this rate has dismissed the effect of opponent strength, because + / - rate doesn't measure player combinations for the opponents.

On the other hand, there is no way to recognize between players who have good individual but bad team numbers, opposed to players with bad individual statistics but good + / - ratings.

This statistical method measure how point differentials change when a particular player is in game versus when he is not, evaluating how the team is performing in both situations.

UNC's Roy Williams is well known by his mass substitutions in the game.
Photograph by Kevin C. Cox

North Carolina Tar Heels's Roy Williams is well known by his mass substitutions in the game

You can read and study this rating system in my artícle in the eBA Basketball Encyclopedia.

Go Back to eBA Emcyclopedia to read the exposition once again...
And remember: the 'Basketball Plus Minus' is a metric that looks at how teams perform with a certain player on the court, how they perform with a certain player off the court, and calculates the overall impact that player has on team success. This is also sometimes referred to as the on court/off court number.

The eBA Basketball Statistics Creative Analysis System tries to compare team success to individual performance, applying reasonably simple methods.
 
If we want to apply the Plus / Minus Ratings to suggest how a certain sequence of players would perform on the floor against an average opponent, we must determine the sum of each of the five players. We must perform the total sum of all of them and no average them. So the team's average plus / minus needs an adjustment be added, which is explained at the eBA System.
 
This topic is fully exposed at the eBA Basketball Statistics System Book with the following items:


About the Fundamentals;
About the Formula;
About the Numbers;
Commentary;
Case Study Book;
and Related Sources.


Message Updated and Enhanced on September 17th, 2018

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Magee Click
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« Reply #2 on: Apr 08, 2013, 03:13:15 AM »

Plus Minus Rating: The Right Definition and  Applicability
Evaluación Plus Minus: La Correcta  Definición y Aplicación


• Plus Minus Rating Cases Study
• Evaluación Plus Minus: Casos de Estudio


( English Translation= See Below )

Una pregunta sobre el ejemplo de números de la última exposición en la clínica de las estadísticas sobre la evaluación plus / minus:

El partido es perdido por un punto ( 87/88 ) y el jugador 1 juega 31 minutos con un tanteador neto de 75/72 en el campo y un plus / minus de +3, mientras que el jugador 2 juega 9 minutos con un tanteador neto de 12/16 en el campo y un plus / minus de -4.

Es posible analizar que el jugador 1 debió haber estado 1 minuto más en el campo para ganar el partido ?





A question about the numbers example at the last exposition at the statistics clinic about the plus minus / rating:

The game was a one point lose ( 87/88 ) and player 1 plays 31 minutes with a net score of 75/72 on court and a plus / minus of +3, meanwhile player 2 plays 9 minutes with a net score of 12/16 and a plus minus of -4.

It is possible to analyze that player 1 would be on court for another minute to win the game ?


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Lorenzo311
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« Reply #1 on: Feb 12, 2006, 04:33:27 PM »

Plus Minus Rating: The Right Definition and  Applicability
Evaluación Plus Minus: La Correcta  Definición y Aplicación


• About Plus Minus Numbers Weight
• Sobre el Valor de los Números del Plus Minus


( para Traducción al Español= Ver a Continuación )

I think we have to to give the on-court and off-court numbers the same weight. If he did not do so, I am not sure how we would interpret the plus / minus rating.

Making the measure a per 100 possessions measure it's better rather than per 48 minutes: that's means, it's a very good thing anytime we are able to remove the effect of pace.


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Creo que se debe dar el mismo peso a los números en-el-campo y fuera-del-campo. Si él no hizo así, no estoy seguro de que podamos interpretar el rating plus / minus .

Haciendo la medición per 100 posesiones es más conveniente que por 48 minutos: eso significa, que es muy bueno remover los efectos del ritmo de juego toda vez que sea posible.


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horace_131
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« on: Feb 12, 2006, 01:29:07 PM »

Plus Minus Rating: The Right Definition and Applicability
Evaluación Plus Minus: La Correcta Definición y Aplicación


• Doing basketball analysis and not only stats-numbers
• Haciendo análisis del baloncesto y no sólo números estadísticos


( para Traducción al Español: Ver a Continuación )

Something about the Plus Minus Rating you refers to at the eBA Method section:
I understand this definition of rating: (on-court +/-) minus (off-court +/-)
These are all per-48 minutes measures. Don't you think it be better if the definition were the following?

Plus Minus Rating= (on-court +/-) minus (off-court +/-) plus (20% of average team +/-)

Alternatively, doing basketball analysis and not only stats-numbers, one could just normalize the Plus Minus Rating so that the average minutes-weighted rating for a given team was equal to the team's average plus/minus.

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The eBA-Stats.com® Group is becoming a primary source of information and services for basketball coaches at the game statistical analysis area. In our last two years of professional life, the Site eBA-Stats.com® became the quickest and modern road to that information. eBA Stats Group is also in Google +, Facebook and Twitter, and in 3 Basketball Video Channels ! Enjoy it ! In this photograph presented by #eBAStatsGroup #BasketballStatistics Analysis .


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All our sites, eBA-Stats.com ~ eBAforums.com ~ eBAwords.com ~ eBAclinics.com ~eBAsystem.com & eBAblogs.com, has been built as a Basketball in general and Statistics in particular labor of love.
The eBA-Stats.com® Group is becoming a primary source of information and services for basketball coaches at the game statistical analysis area. In our last two years of professional life, the Site eBA-Stats.com® became the quickest and modern road to that information.
eBA Stats Group is also in Google +, Facebook and Twitter, and in 3 Basketball Video Channels ! Enjoy it !

Alguna reflexión sobre el  Plus Minus Rating que Ustedes describen en la sección Método eBA:
entiendo esta definición del rating= ( +/- en juego ) menos ( +/- en banco ).
Son todas mediciones per -48 minutos. No piensan que sería mejor una definición como la que sigue ?

Rating Plus Minus= ( +/- en juego ) - ( +/- en banco ) + (20% del +/- del promedio de equipo)

Alternativamente, haciendo análisis del baloncesto y no sólo números estadísticos, se podría solo normalizar el Rating Plus Minus de manera tal que el promedio de minutos que influencia sobre el rating para un determinado equipo sea igual al promedio plus/minus del equipo.


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