### Smoothing Parameter box

The Smoothing Parameter value determines the degree of smoothing applied to the data for the spline, uniform, and triangle filters.

For the spline filter, it is best to set this value to 0 to indicate that the value computed via GCV should be used. The computed value then replaces the 0 in the edit window.

For uniform and triangle filters, the smoothing parameter represents one half of the width of the window used in the (weighted) moving average.