29 lines
885 B
Matlab
29 lines
885 B
Matlab
function x = generate_sine(amplitude, frequency, phase, fs, duration, duty)
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% GENERATE_SINE: returns a matrix of sampled sine wave
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% CONTRIBUTORS:
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% Arthur Lu: Original author
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% Benjamin Liou: refactoring and annotations
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% DOCUMENTATION:
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% phase shift is in number of periods
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% fs is the sampling frequency: how many sample points per second
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% duration is time in seconds
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% duty does not apply for sinusoids
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% initialize local variables from input arguments
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n = fs * duration; % number of samples (length of matrix)
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dt = 1 / fs; % sampling period: time between two sample points
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% initialize a one dimensional zero matrix to be populated
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x = zeros(1, n);
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% populate the matrix
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for i = 1:n
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t = i * dt; % time at the i'th sample
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x(i) = amplitude * sin(2 * pi * frequency * t - phase);
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end
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end
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