plotting a sphere using isonormal

How can you plot a 3D sphere using the command "isonormals" with a color of my choice? Thanks!!!! Any help would be appreciated.

Answer 1

[Anudeep Kumar]

Hello Oanh,

Below is the code that produces a 3D sphere using isonormals:

% Define the grid 
[x, y, z] = meshgrid(linspace(-1, 1, 50)); 

% Define the equation of the sphere 
v = x.^2 + y.^2 + z.^2; 

% Create the figure 
figure; 

% Plot the isosurface for the sphere 
h = patch(isosurface(x, y, z, v, 1)); 

% Apply isonormals to improve the rendering 
isonormals(x, y, z, v, h); 

% Set the color of the sphere 
% Replace [0.5, 0.5, 0.8] with your desired RGB color 
h.FaceColor = [0.5, 0.5, 0.8];   
h.EdgeColor = 'none'; 

% Adjust lighting and view for better visualization 
camlight;  
lighting gouraud; 
axis equal; 
xlabel('X-axis'); 
ylabel('Y-axis'); 
zlabel('Z-axis'); 
title('3D Sphere with Isonormals'); 

Here is the link for isnormals() function for your reference:

https://www.mathworks.com/help/matlab/ref/isonormals.html

I hope this works!