NEWS
  • NLREG has been selected as the "Editor"s Pick" by SoftSeek.

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  • NLREG is in use at hundreds of universities, laboratories, and government agencies around the world (over 20 countries). For a list of a few organizations using NLREG click here.

  • If you have categorical variables, you may want to use a Decision Tree to model your data. Check out the DTREG Decision Tree Builder.

  • You also should check out the News Rover program that automatically scans Usenet newsgroups, downloads messages of interest to you, decodes binary file attachments, reconstructs files split across multiple messages, and eliminates spam and duplicate files.

    Fit A Sine Wave With A Linear Trend


    This example fits a function that has a sine term and also a linear growth trend.

    Here are the NLREG statements to fit this function:

    Title "Linear trend with sine component";
    Variables X,Y;
    Parameters p0,p1,Amplitude,Period=2.3,Phase=0;
    Function Y = p0 + p1*X + Amplitude*sin(2*pi*(X-Phase)/Period);
    Plot Residual,Grid;
    Data;
    [ data goes here ]
    

    Here is a plot generated by NLREG showing the function fitted to a a set of values.



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