How to plot function part by part?

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Faris Hajdarpasic
Faris Hajdarpasic 2019-3-16
评论： Walter Roberson 2019-3-17
So I want to set duration of plotting y=sin(t) to 10 seconds, but to plot it part by part every 2 seconds. So that means every 2 seconds plotting should be 'updated'.
I want to see how this work with basic function, because I want to apply it on plotting graph of winsound(sound card). It will also durate 10 seconds, and I need to update it every n seconds. So it is easier for me to see how this works on simple function such as sin(t). I hope you understood what I want to do, and I would be thankful if someone could solve my problem :)
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Walter Roberson
Walter Roberson 2019-3-17
outline:
while there is more to do
addpoints(....)
pause(2)
end
Faris Hajdarpasic
Faris Hajdarpasic 2019-3-17
But my action should be 10 seconds long. Is that what I should do in this "there is more to do"? I mean if duration is 10 seconds and every 2 sec I need to display part, I should run loop five times, and every time 1/5 of length should be displayed. Thats the point. So I can make it work like this?

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Walter Roberson
Walter Roberson 2019-3-17
编辑：Walter Roberson 2019-3-17
duration = 10;
Fs = 20; %samples per second
secs_per_plot = 2;
data = randi([-5 5], 1, duration*Fs); %example data for illustration
t_cols = reshape((0:Fs*duration-1)/Fs, Fs*secs_per_plot, []);
data_cols = reshape(data, Fs*secs_per_plot, []);
%the work
h = animatedline();
for K = 1 : size(data_cols,2)
addpoints(h, t_cols(:,K), data_cols(:,K));
drawnow();
pause(secs_per_plot);
end
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Faris Hajdarpasic
Faris Hajdarpasic 2019-3-17
I have been trying for whole day, this is why I asked cuz i couldnt figure it out.But thanks anyway
Walter Roberson
Walter Roberson 2019-3-17
t_cols is already time in fraction of a second. Consider sin(2*pi*F*t) where F is the frequency of the sine wave and t is time in seconds.

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