I have a code for data acquisition n plotting from one sensor how do write the code for three sensors such that I plot three graphs of different color in same figure

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Amit Kadarmandalgi on 25 Dec 2018
Commented: Walter Roberson on 7 May 2020
clear all
close all
clc;
a = arduino();
tmax = 50;
figure(1),
grid on,
title('pulse sensor Analog Voltage Real Time Data Graph')
xlabel ('Time (s)'), ylabel('Voltage');
axis([0 tmax+1 -0.5 5.5]);
k = 0;
v = 0;
t = 0;
tic
while toc<= tmax
k = k + 1;
t(k) = toc;
if k > 1
line([t(k-1) t(k)],[v(k-1) v(k)]);
drawnow;
end
end
Walter Roberson on 7 May 2020
The frameworks people have posted should work, provided that you do not need more than about 40 Hz. (But I do recommend animatedline() instead of continually doing line())

madhan ravi on 25 Dec 2018

Walter Roberson on 25 Dec 2018
line() can accept a 'color' option.
However, it is inefficient to draw a line between every pair of points. You should look at animatedline() which permits you to addpoints()

Amit Kadarmandalgi on 25 Dec 2018
clear all
close all
clc;
a = arduino();
tmax = 50;
figure(1),
grid on,
title('pulse redings')
xlabel ('Time (s)'), ylabel('Voltage');
axis([0 tmax+1 -0.5 5.5]);
c= 0;
v= 0;
p=0;
k=0;
t = 0;
tic
while toc<= tmax
c = c + 1;
t(c) = toc;
if c > 1
line([t(c-1) t(c)],[v(c-1) v(c)],'color','blue');
hold on
line([t(c-1) t(c)],[p(c-1) p(c)],'color','red');
hold on
line([t(c-1) t(c)],[k(c-1) k(c)],'color','green');
drawnow;
end
end
Amit Kadarmandalgi on 25 Dec 2018
thanks for the answers .... managed to figure it out this is the code if someone is in a simillar situation