How to continuously real-time plotting graph from arduino to matlab (10k Variable Resistor)

Question

Charles Lim 2013-8-13

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回答： Madhu Govindarajan 2017-10-17

Hello and good day to all the experts and visitors of Mat-Lab, I am a mechatronic student and now facing problem trying to interface matlab and arduino..

I am trying to real-time plotting graph from arduino to matlab with (10k variable resistor), but the graph will stop plotting after reach the Maximun X-axis (I set 0-1000).

Can it continuously real-time plotting the graph non stop? full of appreciation or teaching me to solve it.

the code is shown below:

a = arduino('COM3');
interv = 1000;
passo = 1;
t=1;
x=0;
while(t<interv)
b=a.analogRead(0);
x=[x,b];
plot(x);
axis([0,interv,0,1024]);
grid
t=t+passo;
drawnow;
end

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Kerone Naidoo 2017-3-8

Hi,

just dont bound the axis, remove the bounds on the axis and that should allow it to continually plot the voltage.

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Answer 1

David Sanchez 2013-8-13

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在 MATLAB Online 中打开

You just have to change the axis when the highest value is reached:

axis([interv,2*interv,0,1024]); % adapt values to your needs

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Charles Lim 2013-8-16

Very Thank you for replied

I set interv = 1000

after I change this code

the x-axis started from 1000 to 2000

how do I start from 0 - 1000 after the highest value is reached auto start from 1000 - 2000 , continuously non stop ?

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Answer 2

anand 2016-12-22

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just make use of while(1) after a = arduino and at the last make use of a end function this solves your problem

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Answer 3

Sanjay Raam 2014-2-9

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编辑：Sanjay Raam 2014-2-9

you need not set axis between 0to1024

instead give the following statement

axes auto;

by the way, thanks for your program... it was useful for me to learn!!

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Answer 4

khoulod ghanem 2015-9-28

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I am trying to plot current-voltage curve from Arduino to Matlab , can you help me to start ??

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Answer 5

ravi kumar 2017-2-2

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This did not work for me. I tried this one: Real Time Analog Voltage in Matlab using Arduino it uses line function. anybody knows how to scroll the time line?

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prasad noolu 2017-8-17

编辑：prasad noolu 2017-8-17

在 MATLAB Online 中打开

try this code: clear all

a = arduino

x = 0;

for k = 1:1000

    b = readVoltage(a, 'A0');
    x = [x, b];
    plot (x);
    grid;
    drawnow;

end

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Answer 6

Madhu Govindarajan 2017-10-17

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Checkout this video - https://www.mathworks.com/videos/plotting-live-data-of-a-temperature-sensor-using-arduino-and-matlab-121317.html?s_tid=srchtitle

HTH, Madhu