scatter3 color projection

Question

Tsuwei Tan 2021-7-25

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/885309-scatter3-color-projection

评论： Tsuwei Tan 2021-7-25

采纳的回答： KSSV

test_data.mat

在 MATLAB Online 中打开

Please load the test_data.mat

load('test_data.mat','test')
x=test(:,1);
y=test(:,2);
z=test(:,3);
scatter3(x,y,z)

This gives me a 3D scatter plot, but how do I create a probability density function which looks like the pic below? The colorbar is normalized for z values and the min of z is shown as red, max is shown as blue. Thank you!

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Answer 1

KSSV 2021-7-25

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/885309-scatter3-color-projection#answer_753324

在 MATLAB Online 中打开

clc; clear all ;
load('test_data.mat')
x=test(:,1);
y=test(:,2);
z=test(:,3);
figure
scatter(x,y,1000,z,'s','filled');
xi = linspace(min(x),max(x)) ; 
yi = linspace(min(y),max(y)) ;
[X,Y] = meshgrid(xi,yi) ;
Z = griddata(x,y,z,X,Y) ;
figure
pcolor(X,Y,Z) ;shading interp ; colorbar