3D image - how to delete some domain

Hello !

I have the question ,

I try to plot the graph , but I don't know how to erase those part of the graph that lies outside my domain , what should I do ?

Thank You !

Answer 1

[Tridib]

Hello @abc def,

The “fimplicit3” function is designed to plot 3-D implicit functions defined by “f(x, y, z) = 0” over specified intervals for “x” , “y”, and “z”. While it does not directly allow for plotting a cylinder between two planes (two functions), similar results can be achieved by using the following code:

r = 3; x0 = 3; y0 = 3; 

% Angular range 
theta = linspace(0, 2*pi, 100); 

% x and y coordinates of the cylinder 
x = x0 + r * cos(theta); 
y = y0 + r * sin(theta); 

% z range 
z_min = zeros(size(theta)); 
z_max = 18 - x - y; 

figure; 
hold on; 

%Plotting between the given limits 
surf([x; x], [y; y], [z_min; z_max], 'FaceColor', [1 0.5 0]); 
view(60, 20); 
grid on; 
axis equal; 
hold off; 

For more details, please consult the documentation for the functions utilized:

“fimplicit3”: https://in.mathworks.com/help/matlab/ref/fimplicit3.html

“surf”: https://in.mathworks.com/help/matlab/ref/surf.html

Hope this helps!