MATLAB: The x-axis of the graph didnt follow the lentgh of the data

Question

Hi, Good day

I'm a new beginner for MATLAB.

why, when I'm plot the raw signal data,the x-axis make an extended plotted and left some space.

In my situation, the length of data is 12718, and the figure show, it's stop at 12718. But why, this figure plotted the x-axis until 14000, why not 12718.

There is an attachment figure (.jpg) as reference.

This is the code :

fs=100; raw=load('nazrulPPG.txt'); data=raw(1900:7900); L=length(data); t=0:(1/fs):60;

%figure (1) Original data subplot(311); plot(raw) subplot(312); plot(t,data);

Thank you for your cooperation

Best Regards Sabrina

Answer 1

After your plot command, add this:

set(gca,'xlim',[0 L]);