How to calculate and plot sin functions?
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Hello I am a Matlab begginer user. I am trying to calculate and plot the function of a damped sine-wave and the dynamic range (envelope). However, I can not find the right set of code to make the problem run.
This is the equation I am working on:
f(t)=80.^((-1/80)*(t))*sin(0.25*(t)+(pi/3))
I have defined t as t = 100 % seconds
Any help will be welcome.
Thank you
回答（1 个）
MATLAB works (primarily) with numeric arrays, thus the name "MATrix LABoratory". You need to first create a vector of (numeric) time values, and then perform your operations on it like this:
>> t = 0:0.1:100;
>> s = 80.^(-t/80) .* sin(0.25*t+pi/3);
>> plot(t,s)
These tutorials are highly recommended for all beginners, and introduce many useful aspects of both understanding and using MATLAB:
1 个评论
Nicolas Sarmiento Sierra
2015-4-7
Dear Mr Cobeldick.
Thank you for you answer.
I have understood the concept so far. However, I might now be able to plot in via Simulink and obtain a graphic in the next fashion:
I suppose this result can be plot by opening the Simulink library and selecting the proper symbols of the sinwave.
Any further recommendation is welcome.
I have completed your recommended tutorials.
Thank you
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2015-4-7
2015-4-7
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