Comments on: More Shot Charts http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/ Advanced Stats for Basketball Fri, 24 May 2013 19:10:05 +0000 http://wordpress.org/?v=2.5 By: Mountain http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-153 Mountain Mon, 31 Mar 2008 16:05:16 +0000 http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-153 Given a shot chart and using a scale of feet left-right (assigned negative-positive) and away from basket you could calculate the central point of all of a player's or team's shots. That would give a first basis for comparing charts but maybe there is a middle ground between that and the original shot chart. Maybe you could find the average location of a shot in each of the 4 quartiles of the graph surrounding that central point and make simple visual comparisons with that. Or maybe go back up one step in detail and show the 3 average shot locations (using least distance from a point to actual shots or simply highest frequency) in each quartile of the chart to give the 12 most common shots of a player and display that as moderately detailed but more digestible representation of their pattern. Perhaps a higher level method could retain all the detail for the player similarity study but a visual would still have some appeal. Given a shot chart and using a scale of feet left-right (assigned negative-positive) and away from basket you could calculate the central point of all of a player’s or team’s shots. That would give a first basis for comparing charts but maybe there is a middle ground between that and the original shot chart. Maybe you could find the average location of a shot in each of the 4 quartiles of the graph surrounding that central point and make simple visual comparisons with that. Or maybe go back up one step in detail and show the 3 average shot locations (using least distance from a point to actual shots or simply highest frequency) in each quartile of the chart to give the 12 most common shots of a player and display that as moderately detailed but more digestible representation of their pattern. Perhaps a higher level method could retain all the detail for the player similarity study but a visual would still have some appeal.

]]> By: kjb http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-152 kjb Mon, 31 Mar 2008 15:45:22 +0000 http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-152 The shots by efg is exactly what I anticipated -- red around the hoop (for dunks & layups), and red at the 3pt line. Thanks for posting this. Very interesting stuff. The shots by efg is exactly what I anticipated — red around the hoop (for dunks & layups), and red at the 3pt line. Thanks for posting this. Very interesting stuff.

]]> By: Eli http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-151 Eli Mon, 31 Mar 2008 01:58:30 +0000 http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-151 Lefties vs. righties would be interesting to look at. I'll look into it. Lefties vs. righties would be interesting to look at. I’ll look into it.

]]> By: Mountain http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-149 Mountain Sun, 30 Mar 2008 18:37:33 +0000 http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-149 Well I should have thought about that a little further. You can't assign turnovers to shots that didnt happen and there are none when the shot did get off. Maybe from video you could in a general way though to 3 pt, midrange and inside takes. Well I should have thought about that a little further. You can’t assign turnovers to shots that didnt happen and there are none when the shot did get off. Maybe from video you could in a general way though to 3 pt, midrange and inside takes.

]]> By: Mountain http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-148 Mountain Sun, 30 Mar 2008 18:33:01 +0000 http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-148 On J1mmy's comment #9, eFG% isn't silly but TS% would be worthwhile, better for some things, and offensive rating by spot would be even better from an overall efficiency standpoint. On J1mmy’s comment #9, eFG% isn’t silly but TS% would be worthwhile, better for some things, and offensive rating by spot would be even better from an overall efficiency standpoint.

]]> By: Basketball http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-142 Basketball Sun, 30 Mar 2008 03:31:44 +0000 http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-142 I agree you really should make a chart of lefty vs. righty shooters. I agree you really should make a chart of lefty vs. righty shooters.

]]> By: G-Dog http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-141 G-Dog Sun, 30 Mar 2008 03:29:58 +0000 http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-141 That was great i loved it. But i think that you should make a chart of lefty shooters vs. righty shooters. See ya That was great i loved it. But i think that you should make a chart of lefty shooters vs. righty shooters. See ya

]]> By: Eli http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-140 Eli Sat, 29 Mar 2008 17:06:50 +0000 http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-140 Thanks for the suggestions, Mountain and Eric. I just put up a chart for offensive rebounding percentage by shot location in a <a href="http://www.countthebasket.com/blog/2008/03/29/rebounding-by-shot-location/" rel="nofollow">new post</a>. As for points from free throws, unfortunately the play-by-play data doesn't give shot locations for missed shots where players are fouled (presumably because these are not counted as official field-goal attempts). So a true shooting percentage (or points per shot) chart isn't possible. I think the extreme baseline jumpers are probably just charting errors on the part of the scorekeepers, but I will try to take a closer look. Thanks for the suggestions, Mountain and Eric. I just put up a chart for offensive rebounding percentage by shot location in a new post.

As for points from free throws, unfortunately the play-by-play data doesn’t give shot locations for missed shots where players are fouled (presumably because these are not counted as official field-goal attempts). So a true shooting percentage (or points per shot) chart isn’t possible.

I think the extreme baseline jumpers are probably just charting errors on the part of the scorekeepers, but I will try to take a closer look.

]]> By: j1mmy http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-134 j1mmy Sat, 29 Mar 2008 04:01:43 +0000 http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-134 "(excluding points from free throws)" reduces a truly promising post to just silly “(excluding points from free throws)”

reduces a truly promising post to just silly

]]> By: Eric http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-133 Eric Fri, 28 Mar 2008 19:56:56 +0000 http://www.countthebasket.com/blog/2008/03/27/more-shot-charts/#comment-133 Offensive rebound percentage from different shots on the floor. Offensive rebound percentage from different shots on the floor.

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