SIN WAVE PLOT NOT WORKING

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Aditya Mehta
Aditya Mehta 2017-2-13
回答： Jan 2017-2-13
>
> f= input('enter the frequency in hertz of the sine wave');
a=input('enter amplitute');
phi=input('enter phase shift');
n=input('enter n')
fs=44000;
t=0:.0001:5;
y= a*sin(2*pi*f*n+ phi);
plot(t,y);
ylabel ('Amplitude');
xlabel ('Time Index');
title ('Sine wave');
end
I have to generate several sinusoid with a given magnitude A, frequency f0 [Hz], and phase shift φ [rad]. x(n) = A sin(2πf0n + φ). what is wrong with above code as it shows the same graph for all the values. also can you tell me how to specify start and stop moment for signal sampling.(forgive my ignorance i am a beginner)

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回答（1 个）

Jan
Jan 2017-2-13
Your y is a scalar, because it does not depend on the time vector t. Try this:
y = a*sin((2*pi*f*n) * t + phi);

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