how to generate random point inside a sphere
27 views (last 30 days)
Show older comments
I am trying to generate random points inside a sphere given the radius and the center. If anyone has a sample code or can help me with this, thanks for the help.
0 Comments
Accepted Answer
More Answers (2)
Najwa Yaminah
on 17 Jan 2020
Edited: Ashish
on 13 May 2020
I have an assignment so I try the following code :
function getPoint() {
var d, x, y, z;
do {
x = Math.random() * 2.0 - 1.0;
y = Math.random() * 2.0 - 1.0;
z = Math.random() * 2.0 - 1.0;
d = x*x + y*y + z*z;
} while(d > 1.0);
return {x: x, y: y, z: z};
}
This works well as you can see
1 Comment
John D'Errico
on 28 Jan 2020
Sigh. Of course, you posted this answer as Python code, when MATLAB code was needed.
Patricia Sperry
on 21 Sep 2019
Edited: Ashish
on 13 May 2020
Floow this method for generating the random points on sphere. I have also used this method for doing my work for the project.
Do try this code:
TH = 2*pi*rand(1,1e4);
PH = asin(-1+2*rand(1,1e4));
[X,Y,Z] = sph2cart(TH,PH,1);
plot3(X,Y,Z,'.','markersize',1)
axis equal vis3d
2 Comments
darova
on 21 Sep 2019
I like how it looks like but all points are on sphere surface (not inside)
I think random radius should be added
DGM
on 23 Feb 2024
Considering that I just deleted 8 other junk answers used for spam links, something tells me that these answers were also spam but have since had their links removed. That might explain why they're not relevant to the question.
See Also
Categories
Find more on Surface and Mesh Plots in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!