PROSAGA码农传奇-模型可视化-如何在Matlab中将静态图改为电影？

<div class =“post-text”itemprop =“text”>
  <P>
    <a href="https://www.mathworks.com/help/matlab/ref/movie.html" rel="nofollow noreferrer">
       <code>
        movie
      </code>
    </A>
     要求你在内存中有一系列RGB图像，并且它们存储在为其设计的结构数组中
     <code>
      movie
    </code>
     功能。
  </p>
  <P>
    你可以做的是一次绘制一个信号
     <code>
      hold on
    </code>
    。此外，您可以使用
    <a href="https://www.mathworks.com/help/matlab/ref/getframe.html" rel="nofollow noreferrer">
       <code>
        getframe
      </code>
    </A>
     实际上将每个绘图捕获到图像中以获得所需的格式
     <code>
      movie
    </code>
    ，将它连接成一个结构数组，最后播放电影。
  </p>
  <P>
    我看到你正在同时绘制所有信号，每个信号只有一列。为了使这容易，再做一个
     <code>
      for
    </code>
     循环并循环通过每个信号 - 每列一个并一次绘制这一个。
  </p>
   <pre>
    <code>
      A=0.1; %Diffusivity or conductivity (switching for variable K)
L=1; %Length of rod
dt= 10^(-4); %value of timestep
X=100; %Wants to Discretize rod into 100 separate sections
t= 10; % 50 timesteps will be taken (dt)
dx=L/X; %delta X needed for the heat equation for this case Pi/100
x1=linspace(0, L, X); %Take 100 equally spaced sections between 0 and L
y1=linspace(0, t, 51);
T1= zeros(X,t); %set a X x t matrix of zeros
%Set boundary and initial conditions
%T0=0; Ends of rod temperature are 0
%TL=0;
%Create a for loop to continuously solve the heat equation until time is up
for i= 2:X-1 %X-1 because we already know initial point
    for j=1:50 % used to update heat equation each step
        T1(:,1)= sin((pi*x1(i))/L);%start solving the heat equation at second
                                  % value in the matrix in column 1 (skip
                                  % 1st because we have initial condition)
        T1(1,:) = 0; %Gives the first column = 0
        T1(100,:) = 0; %Gives last column = 0  just as initial conditions state
        %Heat Equation for T^n+1 (i)
        T1(i,j+1)= A*dt*((T1(i+1,j)-2*T1(i,j)+T1(i-1,j)/dx^2))+ T1(i,j);    
    end
end
figure(1)
hold on; % New

% New - To store the frames for the movie
frames = repmat(struct('cdata', [], 'colormap', []), 50, 1);
for j = 2 : 51
    plot(x1,T1(:,j));
    frames(j - 1) = getframe(gcf);        
end
close all; % Close the figure
% Play the movie
figure;
movie(frames, 1, 5); % Play the movie once at 5 frames per second

</code>
  </pre>
  <P>
    新代码将所需的绘图存储为图像 - 您必须看到图形绘制，以便抓取帧。之后，我们关闭数字并以5 FPS播放电影。在这一点之后，你只需要运行最后一个
     <code>
      movie
    </code>
     可以根据需要多次播放电影。第二个参数指定希望影片重复的次数，第三个参数指定影片每秒的帧数。
  </p>
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