How do I change the sample rate of the animated line
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I've got an arduino that is sending a signal to Matlab. The current code I have plots the signal but it's obscured due to the sampling rate. How do I implement or change the sampling rate. This is the code I use to obtain data from the arduino:
figure
h = animatedline;
ax = gca;
ax.YGrid = 'on';
ax.YLim = [0 2];
stop = false;
startTime = datetime('now');
while ~stop
v = readVoltage(a,'A5');
output = v
time = datetime('now') - startTime;
addpoints(h,datenum(time),output)
ax.XLim = datenum([time-seconds(50) time]);
datetick('x','keeplimits')
drawnow
stop = readDigitalPin(a, 'A6');
end
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Antworten (1)
Walter Roberson
am 30 Okt. 2018
You need to redesign your code to overcome this. You need to create an arduino sketch or c/c++ program that does nothing other than to reads the pins and send the results to MATLAB.
Note that if you are using the USB port to send the data then it is limited in the number of transactions per second. https://www.mathworks.com/matlabcentral/answers/400467-what-is-matlab-s-sampling-rate-through-arduino-analog-input#comment_567391
2 Kommentare
Walter Roberson
am 8 Nov. 2018
You do not set t(i) until after you addpoint trying to use its value.
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