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Math Help - Need equation that fits data

  1. #1
    Newbie
    Joined
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    Need equation that fits data

    I'm trying to devise a point system for a project I'm working on and I need to come up with an equation that fits these parameters so that I can fill in the rest of the points. Hopefully someone can help me out. It looks like it should be easy but I can't figure it out. *this is not a school project*

    # | points
    ----------
    1 | 1
    2 |
    3 |
    4 |
    5 |
    6 |
    7 |
    8 | 0
    9 |
    10| -1
    11| -1
    12| -1
    13| -1
    etc.|etc.
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  2. #2
    MHF Contributor
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    Quote Originally Posted by mudderrunner View Post
    etc.|etc.
    There's your problem, right there. There is WAY too little information to solve this problem in any meaningful way.

    One of my favorites:

    # | points
    ----------
    1 | 1
    2 | -2
    3 | -2
    4 | -2
    5 | -2
    6 | -2
    7 | -2
    8 | 0
    9 | -2
    10| -1
    11| -1
    12| -1
    13| -1

    Really, you just have to decide where the breaks are, or if there are any other values.
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  3. #3
    Junior Member Evales's Avatar
    Joined
    Oct 2007
    Posts
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    You could always use the sign function, but there are not that many points.....

    Sign function makes any number equal to its sign.
    Eg:

    1 = 1
    2 = 1
    100 = 1
    0 = 0
    -32 = -1
    -2378 = -1

    y = sgn(x -8)

    When
    x = 0
    y = -1
    When
    x = 8
    y = 0


    *NOTE*

    This is a limited function anything above 8 is 1 and anything below it is -1 I agree with TKHunny that there are not enough values
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