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Post by joetrinsey on Nov 21, 2014 13:42:27 GMT -5
Hi VT Peeps, I know there's a lot of coaches on here, so I figured I would put up a post on this, since some of you might be interested in this. I've written a couple articles and been asked about creating Heat Maps to show hitter or server tendencies. Here's an example: www.heatmapapps.com/heat-map-analysis-of-2014-world-championships/Before this was done by a fairly clunky self-written PC program that involved a lot of mouse-clicking. Well, I was finally able to find a good programmer to translate that into an iPad app and it just hit the App Store. I'm pretty excited about it and have been getting some good feedback from other coaches. If any of you guys are interested, here's the link: itunes.apple.com/us/app/volleymaps/id931856009?mt=8Check it out if you want, or if anybody already has it, I'd love to hear some feedback on how to make it better.
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Post by Sidd Finch on Nov 21, 2014 15:07:58 GMT -5
Looks great, but no Android version!
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Post by shotcaller on Nov 25, 2014 14:14:23 GMT -5
Joe, it has a nice clean look to it. What is the nature of inputting? Does it truly read the heat signature of a serve or attack? Or does in require manual input and you are simply using the heat map as a description of the end product?
If it does use heat signatures can this be done off film? Or does it have to be done live?
Look forward to your responses
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Post by hebrooks87 on Nov 25, 2014 15:39:52 GMT -5
Joe, it has a nice clean look to it. What is the nature of inputting? Does it truly read the heat signature of a serve or attack? Or does in require manual input and you are simply using the heat map as a description of the end product? If it does use heat signatures can this be done off film? Or does it have to be done live? Look forward to your responses Heat maps are simply descriptions of the spatial distributions of an event. The colors indicate the frequency of the event happening somewhere, so in this case, where do the balls land. There's no "heat signature." See en.wikipedia.org/wiki/Heat_map
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Post by hegotgame on Nov 25, 2014 17:07:52 GMT -5
Joe, when you create a heat map do you make it more diffuse if it's from a small number of attacks or serves? I'm wondering if what you've done is just assembled the attack or serve outcomes, or if you've also attempted to take into account the statistical uncertainty and produce something representative of the underlying statistical distribution which would therefore be predictive. Either way, I think it's cool stuff.
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Post by mikegarrison on Nov 25, 2014 17:55:58 GMT -5
Joe, when you create a heat map do you make it more diffuse if it's from a small number of attacks or serves? I'm wondering if what you've done is just assembled the attack or serve outcomes, or if you've also attempted to take into account the statistical uncertainty and produce something representative of the underlying statistical distribution which would therefore be predictive. Either way, I think it's cool stuff. That's a great question. I was wondering the same thing. How precise and accurate was the input? I can take 100 data spots and fit a heat map to them, or I can take six data spots and fit a heat map to them. The maps might look very similar, especially if I decide to smooth out all the variation for graphical prettiness.
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Post by c4ndlelight on Nov 25, 2014 18:05:44 GMT -5
Are they charting where the ball hit the floor, or where it was contacted, or differentiating between the two? I also find it strange there's nothing outside of the 30x30. Not one ball deflected off the block out of bounds?
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Post by shotcaller on Nov 25, 2014 19:02:35 GMT -5
Joe, it has a nice clean look to it. What is the nature of inputting? Does it truly read the heat signature of a serve or attack? Or does in require manual input and you are simply using the heat map as a description of the end product? If it does use heat signatures can this be done off film? Or does it have to be done live? Look forward to your responses Heat maps are simply descriptions of the spatial distributions of an event. The colors indicate the frequency of the event happening somewhere, so in this case, where do the balls land. There's no "heat signature." See en.wikipedia.org/wiki/Heat_mapThanks for the clarification about the nature of heat maps! So it's safe to assume that there is a manual input of sorts? If so is this done live or post match? Is it compatible with any of the other stats programs out there? I.e data volley? Other than the clean look is there any other benefit to heat maps over what else already exists? faster or even automatic input? Increased accuracy? Looking for answers
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