% Define the time vector
t = 0:0.01:2*pi;
% Define the half-wave rectified sine wave
y = abs(sin(t));
% Plot the half-wave rectified sine wave
plot(t, y);
xlabel('Time');
ylabel('Amplitude');
title('Half-Wave Rectified Sine Wave');
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This code will plot a half-wave rectified sine wave in MATLAB.