## How do you make a 3D sphere in Matlab?

To draw the sphere using the returned coordinates, use the surf or mesh functions. [X,Y,Z] = sphere( n ) returns the x-, y-, and z- coordinates of a sphere with a radius equal to 1 and n -by- n faces. The function returns the x-, y-, and z- coordinates as three (n+1) -by- (n+1) matrices.

## How do you plot a sphere in Matlab using surf?

How to use surf to plot sphere function in matlab

- x1 = [-10:1:10];
- x2 = [-10:1:10];
- y = zeros(1,21);
- for i = 1:21.
- y(i) = sphere([x1(i) x2(i)]);
- end.
- Y = meshgrid(y);
- surf(x1,x2,Y);

**What is sphere function?**

The sphere function is one of many test functions that are being used in the literature. In applied mathematics, these test functions, or artificial landscapes, are useful to assess the performance of an algorithm, or a proposed modification of an algorithm.

**How do you plot a circle in Matlab?**

Direct link to this answer

- function h = circle(x,y,r)
- hold on.
- th = 0:pi/50:2*pi;
- xunit = r * cos(th) + x;
- yunit = r * sin(th) + y;
- h = plot(xunit, yunit);
- hold off.

### How to plot a sphere MATLAB?

The next step is to plot the sphere using ‘surf’. The code of the plotting line will read s1=surf(x*a(1,4)+a(1,1),y*a(1,4)+a(1,2),z*a(1,4)+a(1,3)); where s1 is the variable assigned to sphere 1, x, y and z are the variables x, y and z, a(1,4) represents the number in matrix ‘a’ in row 1 and column 4 and denotes the radius of the sphere.

### How to generate random points inside sphere using MATLAB?

radii = 3* (rand (1000,1).^ (1/3)); Convert to Cartesian coordinates and plot the result. [x,y,z] = sph2cart (azimuth,elevation,radii); figure plot3 (x,y,z, ‘.’ ) axis equal. If you want to place random numbers on the surface of the sphere, then specify a constant radius value to be the last input argument to sph2cart.

**How can I generate spheres from points in MATLAB?**

The Matlab function ‘sphere’ generates the x-, y-, and z-coordinates of a unit sphere for use with ‘surf’ and ‘mesh’. ‘Surf’ and ‘Mesh’ are two functions that generate plots in 3-d, where ‘surf’ will create a 3-d surface plot and ‘mesh’ will create a wireframe mesh in 3-d. For this example we will be using the ‘surf’ function.

**How to graph a sphere?**

(x − 2)2+(y − 3)2 = 16 x – 2 2+y – 3 2 = 16