Curve fitting in Matlab

  1. Hi,

    I've just been trying unsuccessfully to fit a polynomial to a large set of data in Matlab (1301 points). I want to fit a polynomial to the data so that I have a function with which to try and manipulate the data in different ways.

    I have no problem fitting polynomials to much smaller sets of data. I know that other curve fitting options exist, such as the moving average. However, it is my understanding that they do not return a function which can be used (so it seems it is just for presentation).

    Has anyone had any experience with this?

    Thanks, :confused:

  2. jcsd
  3. Dr Transport

    Dr Transport 1,535
    Science Advisor
    Gold Member

    Do a search on the Mathworks web site, there is a bunch of code that can be looked at to help you along. Look in your numerical analysis text for Lagrange polynomials or spline curve fits.
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