2D histogram and/or 2D Kernel Density

Question

Devinya Herath 2011-10-15

0
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https://ww2.mathworks.cn/matlabcentral/answers/18361-2d-histogram-and-or-2d-kernel-density

I have two series of data (of type double). I want to create a 2D histogram plot and a 2D kernel density estimate plot. Please help. Below is my coding

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
curs1 = exec(conn, 'select sp_x, sp_y from road_part6_trajectories_oneway2_new_segments_cartesian2');
format long;
curs1 = fetch(curs1);
AA = curs1.Data;
x = [AA{:,1}]';
y = [AA{:,2}]';
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Pls let me know how to create a 2D histogram from x and y (both of type double)

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Answer 1

Wayne King 2011-10-15

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https://ww2.mathworks.cn/matlabcentral/answers/18361-2d-histogram-and-or-2d-kernel-density#answer_24664

在 MATLAB Online 中打开

Are you sure you don't mean you want a 3-d histogram of a bivariate random variable, x and y? A histogram of one random variable is a 2-D histogram.

See hist3

load carbig
X = [MPG,Weight];
hist3(X,[7 7]);
xlabel('MPG'); ylabel('Weight');
set(gcf,'renderer','opengl');
set(get(gca,'child'),'FaceColor','interp','CDataMode',...
'auto');