matlab实时脚本画图代码

以下是一个使用MATLAB实时脚本画图的示例代码：

clear; clc; close all;

tim = 0; % 初始化时间
sub = rossubscriber("/MOTOR_STATE","actuatorcontroller_ros/motor_state"); % 订阅ROS话题
pos = \[\]; % 存储实际位置数据
refpos = \[\]; % 存储参考位置数据

figure(1);
h1 = animatedline('color','b'); % 实际位置折线图
h2 = animatedline('color','r','marker','.'); % 参考位置折线图

while(tim < 20)
    msg = receive(sub, 1000); % 接收新数据
    tim = msg.Time;
    pos(end+1) = msg.Position;
    refpos(end+1) = msg.Refposition;
    
    addpoints(h1, tim, msg.Position); % 实时添加实际位置
    hold on;
    addpoints(h2, tim, msg.Refposition); % 实时添加参考位置
    drawnow; % 立刻绘图
end

这段代码使用了MATLAB的ROS工具箱，通过订阅ROS话题获取实际位置和参考位置数据，并实时绘制折线图。在循环中，通过`receive`函数接收新数据，然后使用`addpoints`函数将数据添加到折线图中，最后使用`drawnow`函数立即绘制图形。
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