Plot in real time
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I want to take a 2-dimensional vector and plot it, but I want to show the line being drawn as if the data is being gathered in real time. However, I'll have the data already stored in an array.
For example, if I wanted to plot y = sin(x) from x = 1 to 25, then I would use the following command:
plot(sin(1:0.01:25));
But I want to see the curve being drawn as if it's being done in real-time. How would I do this?
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the cyclist
il 25 Lug 2013
One possible way:
x = 1:0.01:25;
y = sin(x);
n = numel(x);
figure
hold on
for i = 1:n
plot(x(1:i),y(1:i))
xlim([0 25])
ylim([-1.1 1.1])
pause(0.05)
end
4 Commenti
Alireza Madani
il 30 Apr 2022
Does anyone know how can we program this scenario in a way that the speed of the while/for loop is controller with the real time? For example if we want to plot y = sin(t) and t = 0 : 0.01 : 25. It actually takes 25 seconds for the MATLAB to plot this.
Più risposte (1)
Anshul Rathore
il 25 Mar 2019
Don't use hold on instead use drawnow function to update your plots as it is much faster.
x = 1:0.01:25;
y = sin(x);
n = numel(x);
figure;
for i = 1:n
plot(x(1:i),y(1:i),'-r');
xlim([0 25]);
ylim([-1.1 1.1]);
drawnow;
end
2 Commenti
Jonathan Arias
il 22 Mag 2021
you have to add this line (before drawnow):
addpoints(an,x(i),y(i));
More examples: https://la.mathworks.com/help/matlab/ref/drawnow.html
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