Real Time Plot Not Smooth Enough

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Bolin
Bolin 2014-10-19
回答： Star Strider 2014-10-19
Hi Guys
I have written a real time plotter that plots 128 samples I receive from an EEG headset, one sample at the time and attached is the result.
Obviously, since I'm plotting one point at a time, it is not going to be continuous enough.
Is there anyway to do real time interpolation to some how connect these dots?
If not, how do people produce real time plots that are continuous (smooth or jagged doesn't matter)?
  2 个评论
Bolin
Bolin 2014-10-19
Let's 'h' be the object we wish to query
for Seconds = 1:5
for Samples = 1:128
Channel_1 = h.data(Samples,4);
Channel_2 = h.data(Samples,5);
subplot(2,1,1)
plot(i+Seconds*128,Channel_1,'--r','LineWidth',1.8), axis([0 640 2000 8000])
hold on
grid on
subplot(2,1,2)
plot(i+Seconds*128,Channel_2,'--g','LineWidth',1.8), axis([0 640 2000 8000])
hold on
grid on
drawnow
end
end

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采纳的回答

Star Strider
Star Strider 2014-10-19
To produce a line that appears continuous, change your plots to:
plot(i+Seconds*128,Channel_1,'-r','LineWidth',1.8)
plot(i+Seconds*128,Channel_2,'-g','LineWidth',1.8)
The '--' linetype will plot a dashed line, the '-' linetype will plot a continuous one.

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