hello everyone .can anyone help me and explain to me this codes for real time ploting????please????
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arduino=serial('COM10','BaudRate',9600);
fopen(arduino);
CM(1)=0;
time(1)=0;
i=1;
tic;
while (toc<=100)
CM(2)=fscanf(arduino,'%f');
time(2)=toc;
figure(1);
grid on;
axis([toc-10, toc+10, 0, 35])
h(i)=plot(time,CM,'b','LineWidth',5);
hold on
CM(1)=CM(2);
time(1)=time(2);
if(i >= 300)
delete(h(i-299));
end
i=i+1;
end
fclose(arduino); % end communication with arduino
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답변 (1개)
Walter Roberson
2022년 5월 29일
As the code runs, data points come in, at times that are not going to be strictly regular (and might possibly be irregular.)
As each new point comes in, the code draws a line segment from the previous point to the new point, and it shifts the axis limits to show 10 seconds before and after the current time. It records the line handles, and after it has accumulated 300 line handles, as it goes it deletes the one that was created 299 ago. So it creates handle #300, deletes handle #1; creates handle #301, deletes handle #2, and so on.
This is all inefficient, and I would recommend that it be replaced with code that creates an animatedline with a limit of 300 points, and then each time a point comes in, uses addpoints() to add the new point to the animated line.
댓글 수: 6
Walter Roberson
2022년 5월 30일
It is not good code. It would be much better to rewrite with animatedline()
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