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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.



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Sine Wave Fitted To Data
This example fits an equation that has a sin function.
Three parameters are calculated: Frequency, the frequency of
the sine wave; Amplitude, the height of the sine wave, and
Offset, the offset above or below the axis about which the
sine wave is oscillating. The Sweep
statement is used to try different starting values for the
Frequency parameter, looking for one that will converge.
Title "Fit a sine wave to data points";
Variables X,Y;
Parameters Offset,Amplitude,Frequency;
Sweep Frequency = 2.4, 2.8, .2;
Function Y = Offset + Amplitude * sin(Frequency * X);
Plot grid;
Data;
[ data goes here ]
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