signal filtering in matlab in matlab

main.m
% Generate a noisy signal
Fs = 1000;              % Sampling frequency
t = 0:1/Fs:1;           % Time vector
f1 = 10;                % Frequency of the signal
f2 = 150;               % Frequency of the noise
signal = sin(2*pi*f1*t) + 0.5*sin(2*pi*f2*t) + 0.1*randn(size(t));

% Design the filter
order = 5;              % Filter order
cutoffFreq = 30;        % Desired cutoff frequency
normalizedCutoffFreq = cutoffFreq / (Fs/2); % Normalize cutoff frequency
b = fir1(order, normalizedCutoffFreq);      % FIR filter coefficients

% Apply the filter to the signal
filteredSignal = filter(b,1, signal);

% Plot the original and filtered signals
figure;
subplot(2,1,1);
plot(t, signal);
title('Original Signal');
subplot(2,1,2);
plot(t, filteredSignal);
title('Filtered Signal');
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