3D plotting with three input an one output.

Question

Osman AKYUREK 2023-5-10

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1960849-3d-plotting-with-three-input-an-one-output

回答： Cris LaPierre 2023-5-22

Hi All,

I have three variables to compute new data like Dt=x^2+y^2+z^2. I want to get a 3D plot to see how Dt change with three variable. My case study is below. Any help will be appreciated.

Best,

OA

clear

close all

Wq=0.55272; % torsional frequency in Hz

Wx=0.50914; % Lateral frequency in x direction (Hz)

Wy=0.51109; % Lateral frequency in w direction (Hz)

Qx=Wq/Wx; % frequency ratio

Qy=Wq/Wy; % frequency ratio

ex=0.204; % geometric eccentricity in x direction

ey=0.204; % geometric eccentricity in y direction

e=sqrt(ex^2+ey^2); % absolute eccentricty

Lx=35; % building dimension in x direction in meter

Ly=35; % building dimension in x direction in meter

rx=Lx/sqrt(12); % radius of gyration in x direction

ry=Ly/sqrt(12); % radius of gyration in y direction

r=sqrt(rx^2+ry^2); % absolute radius of gyration

ref=r+e; % effective radius of gyration

nt=1.134; % nt=(delta max/delta avg)

Ax=(nt/1.2)^2; % torsional irregularity coefffcient Ax=(delta max/1.2delta avg)^2

Lamda=(1.2*sqrt(Ax)-1)/(0.6*sqrt(Ax)); % proposed torsional coeffcient

j=1;

k=1;

l=1;

Lx=1;

Ly=1;

e=0;

for As=0.2:0.1:5

for Ax=0.7:0.1:4;

for e=0:0.1:2;

edx(k,j,l)=(((Qy*(sqrt(((As^-2+1)*(Lx)^2)/12)+e))^2)/Lx)*((1.2*(Ax^0.5)-1)/(0.6*(Ax^0.5)));

edy(k,j,l)=(((Qx*(sqrt(((As^2+1)*(Ly)^2)/12)+e))^2)/Ly)*((1.2*(Ax^0.5)-1)/(0.6*(Ax^0.5)));

ed(k,j,l)=sqrt(edx(k,j,l).^2+edy(k,j,l).^2);

Ass(k,j,l)= As;

Axx(k,j,l)=Ax;

ee(k,j,l)=e;

l=l+1;

end

l=1;

k=k+1;

end

k=1;

j=j+1;

end

figure (1)

isosurface(Ass,Axx,ee,ed,1)

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Nirupama Nagarathinam 2023-5-22

Hi @Osman AKYUREK,

What kind of 3D plot are you looking for?

You have used "isosurface" function here and how is the obtained result different from what you are expecting?

Osman AKYUREK 2023-5-22

Hi,

My variable vectors are 'Ass', 'Axx', and 'ee'. I want to see the change in the 'ed' with colorbar. Can you please help me with that.

Best

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Answer 1

Cris LaPierre 2023-5-22

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1960849-3d-plotting-with-three-input-an-one-output#answer_1241669

If I understand isosurface correctly, you are showing a surface that represents where ed=1 in your volumetric data. For this surface, there will be no variation in color due to ed because the value of ed is the same everywhere on this surface.

Are you instead trying to view the value of ed across your entire volume? If so, that is a 4D problem. You might find this answer helpful.

https://www.mathworks.com/matlabcentral/answers/1960964-how-to-plot-5d-in-matlab#answer_1232454