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

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)))

Answer 1

[Mark Sherstan]

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)))