R: Savitsky-Golay smoothing filter

.sits_signal_sgolayfilt {sits} | R Documentation

## Savitsky-Golay smoothing filter

### Description

Smooth the data in x with a Savitsky-Golay smoothing filter of polynomial order p and length n, n odd, n > p. By default, p=3 and n=p+2 or n=p+3 if p is even. This filters is particularly good at preserving lineshape while removing high frequency squiggles

### Usage

    .sits_signal_sgolayfilt(x, p = 3, n = p + 3 - p%%2, m = 0, ts = 1)

### Arguments

`x` | Time series vector.
`p` | Filter order (integer).
`n` | Filter length (must be odd)
`m` | Derivative to calculate (default = 0)
`ts` | Time scaling (integer).

### Value

A time series with filtered values.

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