How to extend this code to 3 dimension to get a sphere and how to visualize it?

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Trim Dim 2023-5-15

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https://ww2.mathworks.cn/matlabcentral/answers/1963514-how-to-extend-this-code-to-3-dimension-to-get-a-sphere-and-how-to-visualize-it

评论： Shaik 2023-5-15

I have a code with 2 dimension: Nx and Ny. With the following condition i can get the circle of radius 5. Now i want to extend it into 3 dimension Nx, Ny and Nz. The purpose is to get the sphere. How to extend it and which commands should i used to see the output?

Note: I am not looking into any inbuilt function to generate the sphere. Just looking for the extension of this code segment

The code is:

Nx = 64;
Ny = 64;
p = zeros(Nx,Ny);
for i=1:Nx
    for j=1:Ny
        if ((i-Nx/2)*(i-Nx/2)+(j-Ny/2)*(j-Ny/2) < 10)
            p(i,j) = 1.0;
        end
    end
end

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回答（2 个）

Shaik 2023-5-15

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https://ww2.mathworks.cn/matlabcentral/answers/1963514-how-to-extend-this-code-to-3-dimension-to-get-a-sphere-and-how-to-visualize-it#answer_1235124

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To extend the code to generate a sphere in 3D, you can introduce an additional dimension Nz and modify the condition inside the nested loops. Here's an extended version of the code:

Nx = 64;

Ny = 64;

Nz = 64;

p = zeros(Nx, Ny, Nz);

for i = 1:Nx

for j = 1:Ny

for k = 1:Nz

if ((i-Nx/2)*(i-Nx/2) + (j-Ny/2)*(j-Ny/2) + (k-Nz/2)*(k-Nz/2) < 10^2)

p(i, j, k) = 1.0;

end

slice(p, [], [], 1:Nz);

axis equal;