MATLAB 3D Sphere()

The MATLAB 3D sphere() function is a useful tool for generating three-dimensional spheres. This function creates an array of points that can be used to generate a graphical representation of a sphere. The parameters of the function can be used to generate spheres of various sizes, colors, and textures.

Syntax

sphere
sphere(n)
sphere(x)
sphere(x,y)
sphere(x,y,z)
sphere(...,r)
sphere(...,'PropertyName',PropertyValue,...)
h = sphere(...)

Description

The sphere() function generates a unit sphere centered at the origin. To generate a sphere of a particular size, the sphere() function can be scaled by a constant factor. For example, the following code generates a sphere of radius 2:

r=2;
[x,y,z] = sphere;
x = r*x;
y = r*y;
z = r*z;
surf(x,y,z)

In addition to scaling the sphere, the sphere() function can be customized by changing the color, opacity, texture, and lighting properties. For example, the following code generates a yellow sphere:

[x,y,z] = sphere;
surf(x,y,z,'FaceColor','y','EdgeColor','none')

Parameters

The sphere() function can be called with the following parameters:

n: Specifies the number of points used to generate the sphere. This parameter defaults to 20.

x: Specifies the x-coordinate of the center of the sphere. This parameter defaults to 0.

y: Specifies the y-coordinate of the center of the sphere. This parameter defaults to 0.

z: Specifies the z-coordinate of the center of the sphere. This parameter defaults to 0.

r: Specifies the radius of the sphere. This parameter defaults to 1.

'PropertyName': Specifies the name of a property that can be set for the sphere. For example, 'FaceColor' sets the color of the surface of the sphere.

PropertyValue: Specifies the value to set for the property. For example, 'y' sets the color of the surface to yellow.

Example

The following code generates a red sphere of radius 3:

[x,y,z] = sphere(40);
r = 3;
x = r*x;
y = r*y;
z = r*z;
surf(x,y,z,'FaceColor','r','EdgeColor','none')

Conclusion

The sphere() function in MATLAB is a useful tool for generating three-dimensional spheres. By adjusting the parameters of the function, programmers can create spheres of different sizes, colors, and textures.