User`s guide

Smoothing Data
2-21
Example: Smoothing Data
This example smooths the ENSO data set using the moving average, lowess,
loess, and Savitzky-Golay methods with the default span. As shown below, the
data appears noisy. Smoothing might help you visualize patterns in the data,
and provide insight toward a reasonable approach for parametric fitting.
Because the data appears
noisy, smoothing might
help uncover its structure.