[英]How to display Matlab's ode45 results in real time?
Let's suppose that we have the following solver for a system of first-order ODEs: 假设对于一阶ODE系统,我们具有以下求解器:
% func.m
function dydt = func(t,y)
dydt = [y(2); (1-y(1)^2)*y(2)-y(1)];
and the main code: 和主要代码:
% solver.m
tspan=0:1:10;
[t,y] = ode45(@func,tspan,[2; 0]);
How to display in real-time the results, y1(t) and y2(t), for each time step t that the ode45 makes (t=0,1,2,...,10), without waiting for the whole code to finish? 如何实时显示ode45的每个时间步t(t = 0,1,2,...,10)的结果y1(t)和y2(t),而无需等待整个时间代码完成?
The OutputFcn
ode solver option should be used. 应该使用OutputFcn
ode求解器选项。 For example, to plot the solution vs time, the built-in output function odeplot
can be used: 例如,要绘制解决方案随时间变化的曲线,可以使用内置的输出函数odeplot
:
options= odeset('OutputFcn',@odeplot);
[t,y] = ode45(@func,[0 200],[2; 0],options);
You can use your own output function. 您可以使用自己的输出功能。 Here is an example: 这是一个例子:
myOutputFcn= @(t,y,flag)fprintf('t= %s y= %s\n',mat2str(t),mat2str(y))*0;
options= odeset('OutputFcn',myOutputFcn);
[t,y] = ode45(@f,0:1:10,[2; 0],options);
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