3D plot a function f(x,y,z)

26 次查看（过去 30 天）

Omar Keele 2022-10-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1824273-3d-plot-a-function-f-x-y-z

编辑： DGM 2023-4-20

I have a function of the coordinates x,y and z like the following :

function f= f(x,y,z)
    if (x>0) & (y<1)    % this is just an example, do whatever you want with the variables
        f= 1;           
    else 
        f= x-y+2*z;
    end
end

That I want to plot like by using the fimplicit3() function :

syms f(x,y,z)
f(x,y,z) = x^2 + y^2 - z^2;
fimplicit3(f)

The problem is fimplicit3 deals with the symbolic variables but fails to take as argument a function that I 'manually' specified above.

Is there another way to plot such a function ?

I just wanna draw some balls in space.

回答（2 个）

David Hill 2022-10-13

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1824273-3d-plot-a-function-f-x-y-z#answer_1073063

在 MATLAB Online 中打开

g=fimplicit3(@f);

function g = f(x,y,z)

g=1./x.^2 - 1./y.^2 + 1./z.^2;

end

6 个评论
显示 4更早的评论隐藏 4更早的评论

Omar Keele 2022-10-13

I mentioned the fimplicit to illustrate, do you know a matlab command to do this ? Maybe scatter3D?

Something that plot values of f(x,y,z) with different colors, the space should be filled ! (or maybe empty if the value is 0)

David Hill 2022-10-13

https://www.mathworks.com/help/matlab/visualize/visualizing-four-dimensional-data.html

请先登录，再进行评论。

Drc 2023-4-20

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1824273-3d-plot-a-function-f-x-y-z#answer_1219723

guys i need this shape code

Start a new question at the "Ask" link at the top of the page. Include enough information so that other people know specifically what you want. Considering that specific details were intentionally omitted from the image, I have to wonder why you're making it difficult.

Otherwise, see cylinder(), patch(), surf()

请先登录，再进行评论。

请先登录，再回答此问题。