2D histogram for field distribution

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Sérgio Querido 2015-4-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/210404-2d-histogram-for-field-distribution

评论： Image Analyst 2015-4-19

I have a problem with the 2d histogram attach file. I have the coordinates (x,y) of a lot of soccer players and i want to know their field distribution and how many times each palyer is in each "N" bens of the field. Using the 2d histogram code, i have a quetions?

- table size: 120m x 90m (same of soccer field) - bens size: 1m2 - N bens= 10800

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Answer 1

Image Analyst 2015-4-19

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https://ww2.mathworks.cn/matlabcentral/answers/210404-2d-histogram-for-field-distribution#answer_175849

在 MATLAB Online 中打开

See my answer in your duplicate question: http://www.mathworks.com/matlabcentral/answers/204004#answer_175547

I said to use hist3:

fontSize = 20;
numberOfPeopleOnField = 1000;
% Make up some X coordinates for numberOfPeopleOnField people.
x = 120 * rand(numberOfPeopleOnField, 1);
% Make up some Y coordinates for numberOfPeopleOnField people.
y = 90 * rand(numberOfPeopleOnField, 1);
xy = [x, y];
hist3(xy,[120, 90])
xlabel('X', 'FontSize', fontSize);
ylabel('Y', 'FontSize', fontSize);
zlabel('Count (# of People)', 'FontSize', fontSize);

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Sérgio Querido 2015-4-19

And for using 2D histogram code?

Image Analyst 2015-4-19

That is a 2D histogram, despite their poor choice of a name hist3(). It's really a 2D histogram but when they display it, they use a perspective view so it looks 3D-ish so I guess that's why they called it hist3().

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