Plotting points in 3D with mesh

Question

AFRAZ SALIM 2020-4-26

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/520784-plotting-points-in-3d-with-mesh

评论： AFRAZ SALIM 2020-4-26

I have three vectors (X,Y,Z) of equal size. I want to plot them in 3D and interpolate the points. I use following code to plot the points but the figure that i get is not good enough. The plot that i get is also attached. Can someone explain kindly, what i am doing wrong. if more information is needed then kindly let me know.

Note that one vector represents x-coordinate while second represents y-coordinate and third one z-coordinate. If there is any better to visualize this scatter plot(interpolated) that will be also great.

plot3(first_test_vector,second_test_vector,test_label,'.'),hold on
title('1000 points selected for training data & interpolation of test data')
xlabel('x'), ylabel('y'), zlabel('Values')
legend('Sample data','Interpolated test data','Location','Best')
x = meshgrid(first_test_vector);
y = meshgrid(second_test_vector);
z = meshgrid(test_label);
mesh(x,y,z)
colorbar
title('Interpolated test data')
legend('Sample Points','Interpolated test data','Location','NorthWest')

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Rik 2020-4-26

Do you want to create a surface? And can you share your data or write code that will generate plausible data?

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Answer 1

J. Alex Lee 2020-4-26

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/520784-plotting-points-in-3d-with-mesh#answer_428493

编辑：J. Alex Lee 2020-4-26

在 MATLAB Online 中打开

For just visualizing the chosen data in a surface, does this look like what you want?

clc;
close all;
clear;
N = 500;
X = rand([N,1])*2*pi;
Y = rand([N,1])*2*pi;
Z = sin(X).*cos(Y);
scatter3(X,Y,Z,'.')
T = delaunay(X,Y)
hold on
trimesh(T,X,Y,Z,"FaceAlpha",0)