How to create 3d solid cylinder in matlab with help of meshgrid with each of its coordinates fetchable

% Define the parameters of the cylinder

radius = 1; % Radius of the cylinder

height = 2; % Height of the cylinder

num_points = 100; % Number of points along the circumference

% Generate the grid for the x, y, and z coordinates

theta = linspace(0, 2*pi, num_points); % Angles along the circumference

z = linspace(0, height, num_points); % Heights along the axis

theta_indeg = rad2deg(theta); %converting radians to degree

A=ones(100) %making a unit 100x100 matrix

% converting to cartesian coordinates

x= A.*cos(theta_grid)

y= A.*sin(theta_grid)

surf(x,y,z_grid)

Answer 1

[Naman]

Hi Sakshi,

There are some changes required in your code to create a 3d solid cylinder in MATLAB with the help of meshgrid and with each of its coordinates fetchable.

Below is the updated code :

% Define the parameters of the cylinder
radius = 1;         % Radius of the cylinder
height = 2;         % Height of the cylinder
num_points = 100;   % Number of points along the circumference

% Generate the grid for the x, y, and z coordinates
theta = linspace(0, 2*pi, num_points);   % Angles along the circumference
z = linspace(0, height, num_points);     % Heights along the axis

% Convert to cartesian coordinates
[theta_grid, z_grid] = meshgrid(theta, z);
x = radius * cos(theta_grid);
y = radius * sin(theta_grid);

% Visualize the cylinder
surf(x, y, z_grid);
axis equal;
xlabel('X');
ylabel('Y');
zlabel('Z');
title('3D Solid Cylinder');

% Store the coordinates in a structure for easy access
coordinates.x = x;
coordinates.y = y;
coordinates.z = z_grid;

% Fetch a specific coordinate
x_value = coordinates.x(10, 20);  % Fetch x-coordinate at index (10, 20)
y_value = coordinates.y(10, 20);  % Fetch y-coordinate at index (10, 20)
z_value = coordinates.z(10, 20);  % Fetch z-coordinate at index (10, 20)

% Display the fetched coordinates
disp(['Fetched Coordinates: (', num2str(x_value), ', ', num2str(y_value), ', ', num2str(z_value), ')']);

Fetched Coordinates: (0.35689, 0.93415, 0.18182)

I have taken indices (10,20) for example. You can modify the indices (10, 20) to fetch the desired coordinate.

Hope it helps!