Real time plot from streaming data
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How can I plot a graph in real time with data being streamed from yahoo.finance?
Should I use an infinite while loop or a timer? I think neither the two are the most correct solutions since one will always be constrained by their latency and one just want to update the graph whenever the variable is updated.
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Nathan Crosty
am 17 Sep. 2013
Try this code snippet I have in my inventory as an example.
t = 0 ;
x = 0 ;
startSpot = 0;
interv = 1000 ; % considering 1000 samples
step = 0.1 ; % lowering step has a number of cycles and then acquire more data
while ( t <interv )
b = sin(t)+5;
x = [ x, b ];
plot(x) ;
if ((t/step)-500 < 0)
startSpot = 0;
else
startSpot = (t/step)-500;
end
axis([ startSpot, (t/step+50), 0 , 10 ]);
grid
t = t + step;
drawnow;
pause(0.01)
end
1 Kommentar
Tim DeWolf
am 6 Sep. 2016
I'm collecting buffer/queue data from a driver in real time using a MATLAB timer in a GUI (guide) and it works. You can still use MATLAB.
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