How would I plot a sin wave.

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Nicholas Deosaran 2020-9-17

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回答： Sai Sri Pathuri 2020-9-22

Hey all how would this be coded?

For a period of 10 seconds and an amplitude of 1 meter, develop a variable that consists of a sine wave of 2 periods where data are determined every tenth of a second.

i have an idea like this

t = [0:1/10:10];
y = 2*sin(t);
plot (t,a)

But I dont know if that is corrent

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Vinicius Pereira Mateus Borges 2020-9-17

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Hello, the full sine wave function is

sinW = a * sin(2*pi*f*t + theta)
% a is amplitude
% f is frequency
% t is time
% theta is the angle offset

Your answer is mainly correct, but it is missing the 2*pi. You should also probably increase your sampling rate to 1:1/1000:10 to get a better resolution in your plot.

Asad (Mehrzad) Khoddam 2020-9-17

For period of 10 seconds, f =1/10 or f=0.1 in the above equation.

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Answer 1

Sai Sri Pathuri 2020-9-22

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Since you want to plot a sine wave of 2 periods in a time of 10 seconds, the time period of sine wave must be 5.

freq = 1/5;
sineWave = sin(2*pi*freq*t);

As amplitude required is 1, you need not multiply the sine wave with any coefficient. Hence, sineWave variable defined above is suffice. You can plot it as

plot(t,sineWave)