sphere
Create sphere
Description
[X,Y,Z] = sphere returns the x-,
y-, and z- coordinates of a sphere
without drawing it. The returned sphere has a radius equal to
1 and consists of 20-by-20 faces.
The function returns the x-, y-, and
z- coordinates as three
21-by-21 matrices.
To draw the sphere using the returned coordinates, use the
surf or mesh functions.
Examples
Display Unit Sphere
Create and plot a sphere with a radius equal to 1. Use axis equal to use equal data units along each coordinate direction.
sphere
axis equal
Specify Sphere Radius and Location
Specify the radius and location of a sphere by modifying the returned X, Y, and Z coordinates.
Define X, Y, and Z as coordinates of a unit sphere.
[X,Y,Z] = sphere;
Plot the unit sphere centered at the origin.
surf(X,Y,Z)
axis equal
Define X2, Y2, and Z2 as coordinates of a sphere with a radius of 5 by multiplying the coordinates of the unit sphere. Plot the second sphere, centering it at (5,-5,0).
hold on
r = 5;
X2 = X * r;
Y2 = Y * r;
Z2 = Z * r;
surf(X2+5,Y2-5,Z2)
Display Sphere with Different Numbers of Faces
Call the tiledlayout function to create a 2-by-2 tiled chart layout. Call the nexttile function to create the axes. Then, use the sphere function to plot three spheres with different numbers of faces into different tiles of the chart by specifying the axes.
tiledlayout(2,2); ax1 = nexttile; sphere(ax1); axis equal title('20-by-20 faces (Default)') ax2 = nexttile; sphere(ax2,50) axis equal title('50-by-50 faces') ax3 = nexttile; sphere(ax3,100) axis equal title('100-by-100 faces')
