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#1




matlab  finding amplitude, frequency & periodic time of given sine wave
hi every one,
i'm trying to find amplitude, frequency & periodic time of given sine wave using matlab actually the equation is y = 2sin3x and x is 4pi<x<4pi so what commands shoud use in matlab to find those variables in addition, i need to draw the fequency domain plot for the above given plot using matlab please help me thank you 
#2




Quote:
Sorry, I just feel it seems like a stupid assignment. But that doesn't really help you does it. Anyway, as you can see I've shown you how you can easily obtain these constants via observation in real life. That should explain to you certain ways you can go about it. So... do you have any idea what a frequency domain plot even is? What issues are you having with this problem? Do you know how to do these things normally and are having trouble with matlab? What have you done so far on your own that we can help you with? blazed 
#3




thanks bro, what about the 2nd part??? do you guys know abt to draw the fequency domain plot for the above given plot using matlab??
than you 
#4




Quote:
Now, do you know what a frequency domain plot actually is and how to obtain it without matlab? As in by hand? If you do, matlab makes it incredibly easy... blazed 
#5




actually i have no idea how to make to by hand, can you please tell me how can i use matlab to plot it???

#6




Quote:
The concept of the frequency domain. Do you know where that comes from? Do you know what it means? Even in very simple terms? Do you know what is the fourier transform? blazed 
#7




Quote:
hi..i ws searching on how do v study the waveforms in frequencydomain graph. i came accross this post..n really wnt to know how a frequencydomain plot is drawn by hand? Thnx 
#8




frequency domain plot is done with two things:
like just a regular graph, frequency graph has two variables.... W  omega and the magnitude of the transfer function or the function expressed in the sdomain or frequency domain. usually these are the fourier coefficents....just graph these two variables on a graph like you would a regular equation 
Tags 
amplitude, finding, frequency, matlab, periodic, sine, time, wave 
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