## Fourier

Y = a + bsin(2π(X-m)/w) ( Y = a + b*sin(2*pi*(X-m)/w) )

This is a typical sine wave function.

## Double Fourier

Y = a + bsin(2π(X-m)/w) + csin(4π(x-n)/w) ( Y = a + b*sin(2*pi*(X-m)/w) + c*sin(4*pi*(x-n)/w) )

This is a compound of two sine waves, one having half the cyclic period of the other.

## See also

- Standard Curves for information on general options and other curves
- Options for choosing which results to display
- Further Output for additional output subsequent to analysis
- Standard Curves with Correlated Errors for fitting curves with correlated errors
- Saving Results for further analysis
- Fitted Model for graphical display of the model
- Model Checking for diagnostic plots for model checking
- Examples of Standard Nonlinear Curves
- Exponential Curves
- Gaussian Curves
- Growth Curves
- Rational Curves
- Nonlinear Models menu
- Nonlinear Quantile Regression menu
- FITCURVE directive
- FITNONLINEAR directive
- FIT directive
- RQNONLINEAR procedure
- MINIMIZE procedure
- SIMPLEX procedure