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Math Help - Generating a fourier series for a collection of data points

  1. #1
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    Generating a fourier series for a collection of data points

    Hi everyone

    I'm not quite sure how to do this. I have the graph of a function and I want to generate an equation for it. Is there some online free site that I could just upload, say, a .csv file with the data points and have it generate a function for me? I suspect it has to be a fourier series.

    thanks!
    john
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  2. #2
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    Quote Originally Posted by yafmen View Post
    Hi everyone

    I'm not quite sure how to do this. I have the graph of a function and I want to generate an equation for it. Is there some online free site that I could just upload, say, a .csv file with the data points and have it generate a function for me? I suspect it has to be a fourier series.
    thanks!
    john
    I have not seen a free site that will fit your need.
    There are some inexpensive program packages available (probably at your local computer store).

    Just wondering:
    How was the graph generated?
    How did you get the data points?

    If you scaled the data points from the image, you will have a small error introduced into each data point; the resulting equation will not give an exact replica of your original.
    If may be very close -- is that good enough?

    If you have the data points, it should not be that difficult to fit a fourier series to it.

    How many points in your .csv or .txt file?
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  3. #3
    Grand Panjandrum
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    Quote Originally Posted by yafmen View Post
    Hi everyone

    I'm not quite sure how to do this. I have the graph of a function and I want to generate an equation for it. Is there some online free site that I could just upload, say, a .csv file with the data points and have it generate a function for me? I suspect it has to be a fourier series.

    thanks!
    john
    Is this homework or a real problem? If this is a real problem post the graph, and your data here and I am sure someone will look at it for you (and some context would help as well, like where the graph came from, and what it represents, ...).

    CB
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