3D Figure from Excel (x,y,z)

Question

Isabella 2024-6-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2130146-3d-figure-from-excel-x-y-z

评论： Star Strider 2024-6-20

Screenshot 2024-06-19 at 11.10.09 AM.png

I have been trying to create a 3D representation of my data for an ellipsoid-shaped measurement. I have x (length), y (width), and z (intensity) data and have been able to create plots in the past for a variation of this data (y was time). The data is 300x3 (100x1 for each value). For this project, I am struggling to create a 3D figure for my data. I have tried using surf, ellipsoid, fimplicit3, and a bunch of different functions. I'm attaching an image of the desired shape.

Does anyone have any ideas for what code or function I should try instead?

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Answer 1

Star Strider 2024-6-19

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2130146-3d-figure-from-excel-x-y-z#answer_1474446

在 MATLAB Online 中打开

Screenshot 2024-06-19 at 11.10.09 AM.png

It always helps to have your data. A picture may be worth a thousand words, however on MATLAB Answers, data is worth a thousand pictures.

imshow(imread('Screenshot 202....10.09 AM.png'))

Perhaps something like this —

N = 25;

r = linspace(0, 1, N).';

[X,Y,Z] = cylinder(r.^2-1);

X = 5*X;

figure

surfc(Z, X, Y)

grid on

axis('equal')

colormap(turbo)

xlabel('X')

ylabel('Y')

zlabel('Z')

view(-40,30)

ylim([min(ylim) 0])

I use surfc here because I want to be certain what the surface does. Use surf tto plot without the contour lines. Use the view function to orient it the way you want it.

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