Can someone help me explain this code?

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Trung Hieu Tran
Trung Hieu Tran on 30 Mar 2022
Commented: Trung Hieu Tran on 30 Mar 2022
I'm self-learning MATLAB so my knowledge is not really good. I have this MATLAB but I couldn't fully understand what each line does. I hope someone can help me explain them? Thanks.
fs = 48000;
f0 = 2000;
t = 0:1/fs:5/f0-1/fs;
x = sin(2*pi*f0*t);
xn = x + 0.1*randn(size(x));
subplot(211);
plot(t,x);
subplot(212);
plot(t,xn);
hold on;

Answers (2)

KSSV
KSSV on 30 Mar 2022
You can get it yourself, by reading the respective functions documentation.
fs = 48000; % smapling frequency
f0 = 2000; % freqency value
t = 0:1/fs:5/f0-1/fs; % make time steps using frequencies
x = sin(2*pi*f0*t); % make a signal, it is a sine wave here
xn = x + 0.1*randn(size(x)); % add some noise which has a nrmal distribution
subplot(211); % subplot; this will open a figure with two plot options
plot(t,x); % plot the signal
subplot(212);
plot(t,xn); % plot the signal added with noise
hold on;
  1 Comment
Trung Hieu Tran
Trung Hieu Tran on 30 Mar 2022
Thanks KSSV, I'll make sure to read it more to understand

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Cris LaPierre
Cris LaPierre on 30 Mar 2022
Consider going through MATLAB Onramp.
You'll also find the help documentation quite detailed, with accompanying examples.

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