= Savitzky–Golay filter
{wiki=Savitzky–Golay_filter}
The Savitzky–Golay filter is a digital filtering technique used to smooth and differentiate data. It is widely employed in various fields such as signal processing, spectroscopy, and data analysis to improve the quality of data by reducing noise while retaining important features of the signal. \#\#\# Key Characteristics: 1. **Polynomial Fitting**: The method works by fitting successive sub-sets of adjacent data points with a low-degree polynomial (often a quadratic or cubic polynomial).
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