Advanced Stats for Basketball

March 27, 2008

Where Players Take and Make Shots

Posted by Eli in Raw Stats

I haven’t posted in a while, but I have a good excuse. I’ve been assembling a database of play-by-plays from the last five seasons. This will make it much easier to investigate many areas of the game. It’s not completely finished yet, but already there’s a lot of interesting stuff that I can pull from the database. For example, I can quickly calculate that in the four seasons from 2003-04 to 2006-07 (I’m missing a few games, but I have over 99% of games from that time period), there were 14,216 hook shots taken. 45.5% of those shots were made, 54% of those makes were assisted, and 4% of all hook shots were blocked. But that’s not what I really want to examine in this post. Instead I’m going to look at shot location data.

During all NBA games, diligent game charters sit courtside and mark the location of every shot taken on the court down to the square foot. I believe this is done by using a stylus on a touchscreen monitor with a replica of the court on it. This is the source of the shot charts you can see after a game on or CBS Sportsline, and of the compiled shot charts of’s Hot Spots (which I discussed in my first post). With the play-by-play database I’ve constructed it’s possible to look at this shot location data in a number of ways.

First, below is a picture showing where players shoot from. Again it’s based on data from 03-04 to 06-07. The court dimensions are to scale, and each one-foot by one-foot square on the court is color-coded based on the number of field goal attempts from that spot. The color scale runs from blue (few FGA) to yellow (some FGA) to red (many FGA). Obviously the charted locations aren’t 100% accurate, but there are still some very interesting patterns that emerge.

Where Players Take Shots - FGA by Location:

Next, below is a picture showing how well players shoot from different locations. The color-coding is based on the field goal percentage from each spot. Because some one-foot by one-foot squares had a very low number of shot attempts, I grouped the data into three-foot by three-foot squares to reduce the noise (so the shading for a single 1×1 ft square actually represents the FG% in the 3×3 ft square that it’s in the center of). Again, the color scale runs from blue (low FG%) to yellow (average FG%) to red (high FG%).

Where Players Make Shots - FG% by Location:

Finally, this last picture looks at what percent of the made shots from various locations were assisted. For this one I used the basic one-foot by one-foot squares, with the color indicating the percent of the made shots from that spot that were assisted. The color scale is the same - blue (low percentage of makes assisted) to yellow (medium percentage makes assisted) to red (high percentage of makes assisted).

Which Shots are Assisted - Assists/FGM by Location:

Obviously a lot could be said about all of these pictures, but I’ll leave it at that for now. I mainly just wanted to give a preview of some of the kinds of things I’ll be looking at in future posts using data from this new play-by-play database.

UPDATE: I’ve added a few more charts in a new post.


  1. Wow, neat stuff, Eli. Thanks for posting this!

    It certainly seems like an overlay based on the first two could be instructive in helping coaches find the optimal locations on the floor to focus their offense (and their defense).

    The last indicates to me that assists disproportionately are awarded for three point shots, which are often assisted via a relatively simple pass. Shots ‘created’ in the lane seem to be more likely to be made, but less likely to be assisted.

    Comment by Westy — March 27, 2008

  2. How come there’s such a high FG% for shots taken along the baseline (picture 2), in areas where shots are only taken rarely (picture 1)? According to that I’d have my team take more shots from behind the basket. What am I missing? Nice work, btw.

    Comment by Pete — March 27, 2008

  3. I guess it’s not in your data, but I’d love to see the difference zone defense makes here, compared to man-to-man. Maybe a comparison to Euroleague data could be useful here.

    Comment by Pete — March 27, 2008

  4. One thing I’d be interested to see is the efg from each spot. From the chart, it looks like shooting percentage goes down at the 3pt line, which is not very surprising. However, the 3 is worth that extra point. Great stuff, though.

    Comment by kjbMarch 27, 2008

  5. I agree with kjb, I’d like to see the chart with expected points as well

    Comment by kh — March 27, 2008

  6. I like all those assisted buzzer-beaters.

    Comment by silvtown — March 27, 2008

  7. Pete, I’m not sure what’s going on with those baseline shots. I’ll have to look at the data more closely.

    Kevin, I just posted an eFG% chart (and a blocks/FGA chart) in a new post.

    Comment by EliMarch 27, 2008

  8. Hey guys, not too sure the 3rd graph is all that useful.

    It’s fairly common knowledge that 3-point buckets are usually assisted (extremely difficult to “create” a 3 point shot off the dribble). Hence, it makes sense that would appear in red.

    However, (and there is a modest different between professional and college play) the majority of assisted shots come in the form of layups or short-range shots. Obviously, this is also where the majority of all shot attempts take place.

    The 3rd graph unfortunately can lead to incorrect conclusions, such as the one drawn by Henry Abbot of TrueHoop - “One thing that really stands out to me looking at these: if you want to get big assist numbers, play with good three-point shooters. That’s where the assists are.”

    I would venture to counter, “if you want to get big assist numbers, play with good finishers (e.g. the “big” in a pick-and-roll offense). That’s where the assists are.”

    Again, the 3-point shot is difficult to make unassisted, but also the majority of assits are difficult without layups/dunks.

    Comment by Calvin Y. — March 27, 2008

  9. That why people should stop talking about Lebron being a great passer. I hate to sound like I’m bashing the guy, but his passing does not impress me at all since most of his assists are to 3 pt shooters. If you want to impress me with Lebron, note the fact that he can get to the basket and finish any time he wants, that gives me nightmares.
    It’d be interesting to see how many possible assists turn into fouls. I’m a Laker fan and I get frustrated sometimes when Kobe makes a sweet pass to Ronny and then he gets fouled and doesn’t finish (understandably).

    Comment by Marty — March 28, 2008

  10. Dear Sir,

    I am the coach of the Dutch National under16 team men. I am interested if you also has a chart where the misses would have dropped on the floor in relation to the spot where the shot is taken?
    Im other words where are the most likely spots for the rebound? Is that the 70% offside or is it something else.

    With kind regards,

    Bert Samson

    Comment by Bert Samson — April 3, 2008

  11. Unfortunately I do not have data on the location of players when they grab rebounds, so I can’t construct a chart for that. You should check out this article though, which used video tracking to look at where rebounds end up on the court:

    Comment by EliApril 3, 2008

  12. Eli:

    Any way I can get some of you play-by-play data for the earlier seasons?…I have an NBA database going back to 1991-92, but am looking to get NBA play-by-plya data back to 2003-04 (or maybe even 2002-03) from anyone who has personal databases…I already have most of 05-06 and ALL of 06-07 to the present…

    Any help would be appreciated or if you can point me someone who does have it, that would be great and my email is…Thanx…


    Comment by Steve — January 13, 2011

  13. A cross between a tablet and a smartphone. Its extra large display lured away many phablet fans that only stuck with their Samsung or other Android smartphones because those were the only phablet options.

    Comment by Leather iPhone 6 CasesApril 20, 2015

  14. You can go to our Cellular Strike on-line hack tool to generate Mobile Strike unlimited Gold which can be instantly added to your Mobile Strike account, from the
    official Epic Warfare LLC server (Cool proper!).

    Comment by mobile strike cheatFebruary 21, 2016

  15. These recommendations are accomplished for you, so as you find
    out you earn.

    Comment by LatoshaMarch 12, 2016

  16. The good issues about this cruise are: the food,
    the possibility to see the fantastic Dubai Marina, the skyscrapers and lighting at night; and naturally, the great waiter’s

    Comment by dhow cruise dubai marinaMarch 15, 2016

  17. Our wrist wraps go above and beyond the decision of responsibility!

    Comment by JerrodMarch 30, 2016

  18. Throughout the entire wedding ceremony experience, from the engagement party, bridal
    shower, and bachelor social gathering, to the rehearsal dinner,
    marriage ceremony and publish marriage ceremony brunch, Giuseppe wedding catering is prepared to
    be with you every step of the best way.

    Comment by CarriApril 2, 2016

  19. Pro tip: If you do determine to print a calendar,
    please think about using recycled paper and reuse the paper once you not need the calendar.

    Comment by MarilouApril 8, 2016

  20. Plenty of room for sunning, relaxing, or just watching the waterfront mansions float by.
    This 3 stateroom yacht has all of the comforts of home.

    Comment by bareboat yacht charter los angelesApril 12, 2016

  21. In both case, there’s robust preliminary resistance to the
    discharge process.

    Comment by ByronApril 15, 2016

  22. Cancer is now the primary killer of most domestic

    Comment by RobbinApril 15, 2016

  23. We provide everything from limo service in Los Angeles to automotive service in Burbank, in addition to private hourly charters.

    Comment by FranklinApril 23, 2016

  24. For example, you’ve got most likely heard that carrots are good to your eyes.

    Comment by fermented foods listApril 24, 2016

  25. Francis Caldwell is a photographer specializing in world
    travel and stock images. Because he meets the needs of his shoppers,
    he has turn out to be well known and is used to receiving requests for strange topics.

    Comment by WilsonApril 26, 2016

  26. The secret is so obvious, so easy - that nobody really offers it any consideration.

    Comment by MerryApril 26, 2016

  27. In each lesson you watch a video that teaches the indicators while studying along with the given text.

    At the tip of each lesson you’ll be able to practice your
    new vocabulary after which take a quiz.

    Comment by CelindaApril 28, 2016

  28. Our experienced Macon bankruptcy lawyer may also help you
    perceive what chapter could be most helpful in your circumstances.

    Comment by MayMay 16, 2016

  29. Simply wish to say yur article is as astonishing.
    The clarity in your post is just great annd i can assume you’re an expert on this subject.
    Fine with yor permission allow me to grab your feed to keep updated with forthcomingg post.

    Thanks a million and please keesp uup the rewarding work.

    Also visit my weblog; Organisational Change

    Comment by leadership trainingAugust 20, 2016

  30. Hey! I know this is kinda off topic however I’d figured I’d
    ask. Would you be interested in trading links or maybe guest writing a blog post or vice-versa?
    My site addresses a lot of the same topics as yours and I feel we could greatly benefit from each other.
    If you’re interested feel free to shoot me an e-mail.
    I look forward to hearing from you! Wonderful blog by the way!

    my blog :: ShamikaIKurz

    Comment by ShamikaIKurzAugust 23, 2016

  31. I am sure this article has touched all the internet viewers, its really
    really good paragraph on building up new web site.

    Comment by 24, 2016

  32. The skin care that is right helps such that it is secured from excessive stresses, manage the perfect skin condition.

    my web page :: best anti aging skin care line 2014

    Comment by LoriAugust 24, 2016

  33. It’s a wonderful tool for both owners and those looking to buy or rent.
    On the exterior, be sure and mow and trim any overgrowth to
    provide the appearance of a nicely maintained property.
    These tech advances have had the added affect of killing off newspaper readership as
    more and more of the population migrates to the Internet to get their “newspaper fix”.

    Comment by The Creeks On KirkLevingtonAugust 25, 2016

  34. Being all alone is often a good way to have a feeling of self-reliance and freedom but occasionally it could possibly feel a little lonesome in addition to terrifying.
    Also if you can keep a binder that will hold all the information including brochures and online printouts, this
    will help you to stay organized. Whether the property is taken care of by the owner or a property manager, open a
    conversation about how maintenance is handled.

    Comment by lincolndouglasdebates.netAugust 25, 2016

  35. Being all alone is often a good way to have a feeling of self-reliance and freedom but occasionally it could possibly
    feel a little lonesome in addition to terrifying. Also if you can keep a binder that will hold
    all the information including brochures and online printouts,
    this will help you to stay organized. Pepper Spray is to be mounted next to one is
    bedroom bed where one sleeps in the event that someone enters into your personal space.

    Comment by MargartAugust 25, 2016

  36. Condo neighborhood associations generally charge
    dues and membership fees. Be it a visit to the library or grocery store, there
    is usually a helpful effect. Chances are you won’t walk into parties and many social gatherings to you may sometimes need
    to force the issue with others.

    Comment by blankchat.comAugust 25, 2016

  37. All you have to be committed to doing is lifting some items that
    may be a tad heavy and putting some elbow into it.
    If you are unable to see the property a second or third time you still have ways of ensuring you’re not walking into a lemon. But
    isolation is not healthy over long periods of time.

    Comment by 12, 2016

  38. Based on the footprints, that was a penguin wearing

    Comment by bridalshowerinviteOctober 17, 2016

RSS feed for comments on this post.

Leave a comment