sarproz-group

polynomial order

This topic contains 3 replies, has 3 voices, and was last updated by  periz 3 days, 20 hours ago.

  • Author
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  • #3541

    mohsen-ebrahimian
    Participant

    hi
    in APS estimation step , the value of polynomial order is selective.
    What is it’s application?
    What happens when we put polynomial order in a number greater than one?
    thanks for response
    best

  • #3544

    periz
    Keymaster

    polynomial order = 2
    it means you estimate a and b where
    phi = a*t + b*t^2
    polynomial order = 3
    phi = a*t + b*t^2 + c*t^3
    phi is phase, t time
    best

  • #3547

    antig
    Participant

    Does it mean that if I will put polynomal order 2 then estimated model is no longer linear but parbolic?

    Then it is useful?

  • #3548

    periz
    Keymaster

    yes
    usually the non-linear non-parametric model (smart option) works better. However, there could be very specific and particular situations where a polynomial model could be better. It depends on the case. Generally, if you have to go non-linear, I would suggest the smart option

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