How do I plot arduino data with time running in x axis

Question

Abdul Azeez Khan 2019-5-8

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/460848-how-do-i-plot-arduino-data-with-time-running-in-x-axis

回答： Mark Sherstan 2019-5-17

Dear all,

I am stuck in a certain problem where I am getting the data from matlab with respect to the count of iterations. I want it with respect to time so thati perform fft later on for the data. Please help!

clc, clear all;

A=zeros(1,1000);

B=zeros(1,1000);

count = 0;

N=100;

time=(1:N/4);

delete(instrfind({'Port'},{'COM14'}));

s = serial('COM14', 'BaudRate', 115200);

fopen(s);

while(count<=1000)

a=fscanf(s,'%d');

count=count+1;

A(1,count)=a;

B(1,count)=A(count)*.000185;

disp(a);

end

fclose(s);

disp(B)

plot(B) I WANT TO PLOT THIS DATA WITH RESPECT TO TIME ON X AXIS

%plot(abs(fft(B)))

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Answer 1

Mark Sherstan 2019-5-17

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/460848-how-do-i-plot-arduino-data-with-time-running-in-x-axis#answer_375494

在 MATLAB Online 中打开

Use tic and toc to record time. I updated your code below!

clc, clear all;
A=zeros(1,1000);
B=zeros(1,1000);
C=zeros(1,1000);
count = 0;
N=100;
time=(1:N/4);
delete(instrfind({'Port'},{'COM14'}));
s = serial('COM14', 'BaudRate', 115200);
fopen(s);
tic
while(count<=1000)
    a=fscanf(s,'%d');
    count=count+1;
    A(1,count)=a;
    B(1,count)=A(count)*.000185;
    C(1,count)=toc;
    disp(a);
end
fclose(s);
disp(B)
plot(C,B) %I WANT TO PLOT THIS DATA WITH RESPECT TO TIME ON X AXIS
%plot(abs(fft(B)))