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Topic: help with writing a short program using square waves, fourier
series expansion

Replies: 3   Last Post: Feb 21, 2013 10:06 AM

 Messages: [ Previous | Next ]
 Derek Goring Posts: 3,920 Registered: 12/7/04
Re: help with writing a short program using square waves, fourier
series expansion

Posted: Feb 18, 2013 9:50 PM

On Tuesday, February 19, 2013 2:37:06 PM UTC+13, laura wrote:
> A square wave of period 2L is a step function which is equal to 1 for x from 0 to L, then is equal to -1 for x from L to 2L.
>
>
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> A square wave can be approximated by this Fourier Series expansion:
>
> infinity
>
> f(x )=(4/pi) ?((1/n)sin(npix/L))
>
> n=1,2,3,5....
>
> I need to write a program that prompts the user for a maximum value for n and a value for L. Using those values, I have to compute the Fourier Series expansion for a square wave and plot the result.
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> L must be a positive number, and n must be a positive odd integer. If the user does not provide an acceptable number, you should detect the error, display an error message, and stop your script.
>
> You should evaluate the function for 500 values of x, evenly distributed from 0 to 2L.
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>
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> I know this is alot but I have no idea how to even start it! If you can at least start me off that would be great!
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> I know i need to get an input, detect an error, stop the script, and evenly distrubute 500 points im just not sure how. thanks again!

Here's what you need to get you started:
help input

Now, you write some code and when you get stuck come back here and ask for help.
But don't expect us to do your homework for you.

Date Subject Author
2/18/13 Derek Goring
2/20/13 Derek Goring
2/21/13 Steven Lord