如何在 MATLAB 中将 3D 动画线保存为视频或 gif

Question

我想在 3d 中模拟粒子的轨迹，所以我使用以下代码创建了这个小型模拟：

nP=100;
N=100;

z=rand(nP,N);
y=rand(nP,N);        % Compute coordinates of particles for each iteration NS
z=rand(nP,N);  
f = figure

view(3);
for i=N
    
    h = animatedline('MaximumNumPoints', 1.e4,'color',rand(1,3));
    for k = 1:length(x)
   
    addpoints(h,x(i,k),y(i,k),z(i,k));
    
    drawnow
   
   end
     
end
hold on
hold off


 numpoints = 500; 

y2 = 3 +square(x+1);
f = figure 
h = animatedline('Color','b','LineWidth',2); 
h2 = animatedline('Color','r','LineWidth',2);
grid on;
%axis([0,12,-3,+6]) 
for k = 1:N 
  addpoints(h,x(k),y(k),z(k)) 
  %addpoints(h2,x(k),y2(k)) 
  drawnow  

  % Capture the plot as an image 
  frame = getframe(f); 
  im = frame2im(frame); 
  [imind,cm] = rgb2ind(im,256); 
  % Write to the GIF File 
  if k == 1 
      imwrite(imind,cm,'test.gif','gif', 'Loopcount',inf); 
  else 
      imwrite(imind,cm,'test.gif','gif','WriteMode','append'); 
  end 
end

我正在尝试将其保存为 gif 或 mp4。一切正常，但最终保存的是二维粒子的轨迹。关于如何使这项工作有任何想法吗？

Answer 1

您的代码有误：

z=rand(nP,N);
y=rand(nP,N); 
z=rand(nP,N);

应该是（见第一行）：

x=rand(nP,N);
y=rand(nP,N);        % Compute coordinates of particles for each iteration NS
z=rand(nP,N);

在第二部分把view(3)放在drawnow

之前

...
for k = 1:N 
  addpoints(h,x(k),y(k),z(k)) 
  %addpoints(h2,x(k),y2(k)) 
  view(3);
  drawnow  
...

完整代码，对我有用：

nP=100;
N=100;

x=rand(nP,N);
y=rand(nP,N);        % Compute coordinates of particles for each iteration NS
z=rand(nP,N);  
f = figure

view(3);
for i=N
    
    h = animatedline('MaximumNumPoints', 1.e4,'color',rand(1,3));
    for k = 1:length(x)
   
    addpoints(h,x(i,k),y(i,k),z(i,k));
    
    drawnow
   
   end
     
end
hold on
hold off


 numpoints = 500; 

y2 = 3 +square(x+1);
f = figure 
h = animatedline('Color','b','LineWidth',2); 
h2 = animatedline('Color','r','LineWidth',2);
grid on;
%axis([0,12,-3,+6]) 
for k = 1:N 
  addpoints(h,x(k),y(k),z(k)) 
  %addpoints(h2,x(k),y2(k)) 
  view(3);
  drawnow  

  % Capture the plot as an image 
  frame = getframe(f); 
  im = frame2im(frame); 
  [imind,cm] = rgb2ind(im,256); 
  % Write to the GIF File 
  if k == 1 
      imwrite(imind,cm,'test.gif','gif', 'Loopcount',inf); 
  else 
      imwrite(imind,cm,'test.gif','gif','WriteMode','append'); 
  end 
end

更新：抱歉，我没有注意到 Luis Mendo 的评论。

如何在 MATLAB 中将 3D 动画线保存为视频或 gif

How can I save a 3D animated line as a video or gif in MATLAB

matlab

plot

mp4

animation

gif

更新：抱歉，我没有注意到 Luis Mendo 的评论。