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How do you calculate plus minus in basketball

Basketball Statistics Definitions

Here are some explanations of various abbreviations and statistics that we track in our iPad/iPhone stats app...

2Pt the number of 2 point shots made
2PtA the number of 2 point shot attempts
2Pt% the percentage of 2 point shots made, 2Pt% = (2Pt / 2PtA) x 100
3Pt the number of 3 point shots made
3PtA the number of 3 point shot attempts
3Pt% the percentage of 3 point shots made, 3Pt% = (3Pt / 3PtA) x 100
FG the total number of field goals made, FG = 2Pt + 3Pt
FGA the total number of field goals attempted, FGA = 2PtA + 3PtA
FG% the percentage of 3 point shot made, FG% = (FG / FGA) x 100
EFG% the Effective Field Goal percentage gives more credit to made 3 point field goals since they yield 1.5 times the scoring of a 2 point field goal, EFG% = (2Pt + 1. 5 x 3Pt) / FGA
FT the number of free throws made
FTA the number of free throw attempts
FT% the percentage of free throws made, FT% = (FT / FTA) x 100
Pts the total number of points scored by field goals and free throws, Pts = 2 x 2Pt + 3 x 3Pt + FT
Layup the number of layups made. This is determined by tapping one of the layup buttons on the Track Stats screen after a 2 point basket has been made.
LayupA the number of layups attempted. This is determined by tapping one of the layup buttons on the Track Stats screen after a 2 point basket has been missed.
Layup% the percentage of layups made, Layup% = (Layup / LayupA) x 100
Paint Pt the number of points scored in the free throw lane (the paint)
PaintA the number of shot attempts taken from within the free throw lane (the paint)
TO Pts the number of points scored immediately after a turnover. This is determined by the user first selecting a turnover. Then if the next statistical event is a made basket of any type by the opposing team turnover points are recorded.
OReb the number of offensive rebounds
DReb - the number of defensive rebounds
Reb the total number of rebounds, Total Reb = Off Reb + Def Reb
Ast the number of assists
TO the number of turnovers
Force TO the number of turnovers that are forced by the defensive player or team
Dflc the number of deflections by a defensive player or team
Dflc Vic the number of times that an offensive player or team has a pass deflected. You must turn on Ask for Deflection Victim in Team Game Rules under Setup to track this statistic.
Stl the number of steals by a defensive player or team
Blk the number of blocks by a defensive player or team
Blk Vic the number of times that an offensive player or team has a shot blocked. You must turn on Ask for Block Victim in Team Game Rules under Setup to track this statistic.
Chrg the number of time a defensive player or team takes a charge
Recov the total number of steals, blocks and charges taken by a player or team, Recov = Stl + Blk + Chrg
Foul the number of personal fouls committed
Fouled the number of times a player is fouled. You must turn on Ask for Foul Victim in Team Game Rules under Setup to track this statistic.
Force Rush the number of times a defensive player forces an offensive player to rush his shot
Force Jmp the number of times a defensive player forces a jump ball. This is recorded whenever the Jump Ball button is tapped on the Track Stats screen.
Jmp Victim the number of times an offensive player is forced into a jump ball. You must turn on Ask for Jump Ball Victim in Team Game Rules under Setup to track this statistic.
Minutes the total number of minutes a player is in the game. To track this accurately you must make substitutions at the correct clock time.
VPS the Danny Miles Value Point System is a player ranking system developed by Coach Danny Miles of Oregon Tech, VPS = (Pts + Reb + 2 x Ast + 2 x Recov) / (2 x Field Goals Missed + Free Throws Missed + 2 x Fouls + 2 x TO)
+/- the plus/minus statistic is a measure of the point differential when players are in and out of a game. It is calculated by taking the difference in the score when the player enters the game and subtracting it from the score when the player exits the game. These differences are added up over the entire game to give the score. Thus, it is a measure of the impact a player has on the score of the game when he is in the game without measuring any specific statistic.
Effic a measure of a player's efficiency, Effic = Pts + Rebs + Ast + Stl + Blk (TO + FG Misses + FT Misses)
Bench Pt the number of points scored by the non-starters
Def Stop the number of possessions a team prevents the offense from scoring any points, Def Stops = DReb + Opponents TO
Pt/Possess the average number of points scored per possession
OReb% the percentage of available rebounds the offensive team gets, OReb% = OReb / (OReb + Opponents DReb)
DReb% the percentage of available rebounds the defensive team gets, DReb% = DReb / (DReb + Opponents OReb)

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How does plus-minus work? im confused : nba

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The NBA introduces a "plus-minus" indicator - Basketball

In the NBA regular season that has just started, official match reports now indicate a new statistical indicator "plus-minus".

As in other team sports (hockey, football), it shows how much more points the player's team scored (or conceded) in those moments when he was on the court.

For example, Andrey Kirilenko's plus-minus score was +18 in the match against Golden State, the third result in the team. And the leader in the league after the first day was his partner, point guard Daron Williams, "+24", writes "Sport-Express".

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sports resources, you can surprisingly often find lengthy publications on the NetRtg statistic (in common parlance - no rating). So, the other day, on one of the most visited resources of the Runet, with reference to a certain “Athletics”, a multi-ton “analysis” of the NetRtg indicators of Los Angeles Lakers players from a certain blogger was presented. To my reasonable question - about the relationship between the +/ and NetRtg indicators, the first advice was not to disgrace and learn the materiel, and then, after I requested the “super complex” NetRtg formula, a ban followed.

Surprisingly, quite a few users are ready to haw "analysis" about NetRtg and react extremely negatively to the use of the +/- indicator.

Why is that? The main reason is the absolute transparency of the +/- method and the turbidity of the NetRtg method.

Since the results of the analysis of the +/- method are easy to check, it is avoided by bloggers whose main goal is to please their hamsters, who are terrified of the revival of the mosquito. On the contrary, the NetRtg method allows you to lay out complete nonsense and represent the analysis with a smart look.

Descriptions of terms and formulas for some of them are available on the NBA website: https://stats.nba.com/help/glossary/. However, most often synthetic formulas are given there with an erroneous description. In the NBA glossary, you can read:

NetRtg - measures the difference in team points per 100 possessions. At the player level, this statistic is the team's point difference per 100 possessions while he is on the court. Formula:

NetRtg = OffRtg - DefRtg .

OffRtg - measures the team points scored in 100 possessions. At the player level, this statistic is the team points scored per 100 possessions while he is on the court. Formula:

OffRtg = 100*((Points)/(POSS) .

DefRtg is the number of points allowed per 100 possessions by the team. For a player, this is the number of points per 100 possessions that the team allows while that individual player is on the court Formula:

DefRtg = 100*((Opp Points)/(Opp POSS))

Poss is the number of possessions played by the player or team

firstly, the glossary was written by a rewriter hired on the text exchange, and secondly, you don’t make a report, for mistakes in which the employer will give you a fine in the amount of your salary, and half-lying in bed half-asleep reading materials about the NBA, so your moscow works at 10% Mosca Lucy

In simple terms, NetRtg is the same as +/- with the difference being the product of two (!) coefficients:

1) dividing the number of team possessions by 100,

2) dividing the number of average team minutes by 48

For example, for LeBron, the product of these coefficients during his career varied from 1. 131235 to 1.511382, not counting this season.

On the NBA offsite, the POSS parameter is not shown in public tables, instead there is the PACE parameter - the number of possessions per 48 minutes for a team or player. But if you average the number of minutes and possessions on the basis of publicly available tables, then you will not have NetRtg and +/- values, although their correlation will be close to 1.0.

NetRtg is a +/- rate of change type.

However, this “speed” can be high for slag players, in LAL the NetRtg value is now the highest for Bonga and Caruso, and many times more than for LeBron.

Watching an NBA video match, even under the threat of being shot, you will not be able to accurately measure the NetRtg of an individual player who has played several minutes in different quarters, because you will have to record all this time, in addition to score changes, also changes in time and number of possessions. Even a chronic alcoholic who is in a multi-day binge can measure +/-.

What does +/- (and NetRtg too) show?

The +/- indicator (and NetRtg too) shows how much the score has changed while player A is on the court.

Let's take a real example:

Chandler played only the last minute of the 1st quarter. He entered the court at a score of 29-28, left at a score of 35-28.
We consider:

(35-28) - (29-28) = +6.

So +/- Chandler is +6, while Chandler did not score a single point (all points were scored by his partners).

Chandler's NetRtg was probably +7.8 (too lazy to count the multiplier, because it has no physical meaning)

But if you write in a comment, they say, Chandler's indicator is +/- equal to +6, you will get 10 dislikes. But if you write on a hamster resource: Chandler's NetRtg is +7.8, you will get 10 likes. Why? Because to the question “ish bin das ist NetRtg”, you can safely answer “these are complex calculations, go learn the materiel”.

Let's take another example:

Player B of team C scored 25 points in the C-D match, but his +/- turned out to be -11.