Make Random Walk into 3D
显示 更早的评论
I have a code set up for a randomwalk already, but how would I alter it to make a 3D Random Walk?
steplenght = .01;
positions = zeros(2,100000);
currentPosition = [0;0];
currentTimeStep = 2;
while currentPosition(1,1)^2 + currentPosition(2,1)^2 < 1
randomDirection = 2*pi*rand();
unitDisplacementVector = [cos(randomDirection); sin(randomDirection)];
displacementVector = stepLength*unitDisplacementVector;
currentPosition = currentPosition + displacementVector;
positions(:,currentTimeStep) = currentPosition;
currentTimeStep = currentTimeStep + 1;
end
positions = positions(:,1:currentTimeStep-1);
hold on;
scatter(positions(1,:),positions(2,:),2,'filled');
theta = linspace(0,2*pi);
plot(cos(theta),sin(theta));
1 个评论
Walter Roberson
2019-9-18
It is confusing that you have
steplenght = .01;
but your code refers to stepLength . Someone reading the code would be wondering whether there was the intention that the two different variables are related somehow.
采纳的回答
darova
2019-9-18
I do this
dt = .01;
[x, y, z] = deal( 0 );
[X,Y,Z] = sphere(30);
surf(X,Y,Z,'edgecolor',[1 1 1]*0.8,'Facecolor','none')
hold on
k = 0;
while norm([x y z])^2 < 1 && k < 1000
t = 180*(rand-1);
p = 180*(rand-1);
% spherical system of coordinates
x = x + dt*cosd(t)*cosd(p);
y = y + dt*cosd(t)*sind(p);
z = z + dt*sind(p);
k = k + 1;
pause(0.1)
plot3(x,y,z,'.b')
end
hold off
2 个评论
ST
2020-8-27
Can you update the code for the Random Waypoint Mobility in 3D? I want to add different velocities, directions and pause times for each node within the boundaries of 3D cube.
Bruno Luong
2020-8-27
编辑：Bruno Luong
2020-8-27
The code by danova is flawed in the sense that create an anisotropic walk. The particle ends up systematcally near the pole. Generate direction with uniform spherical angle coordinates will condense the direction to north/south.
I call this climatic walk. ;-)
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Creating and Concatenating Matrices 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
