lnn {PROcess} | R Documentation |

## Estimate Signal and Variation of a Spectrum

### Description

Estimate the signal and the variation of a spectrum.

### Usage

lnn(x, span = 21, sm.span = 11)

### Arguments

`x` |
a vector of real values. |

`span` |
the window widith for estimation of local variation. |

`sm.span` |
the window width for estimation of the signal of x. |

### Details

The signal of a spectrum is estimated by moving average and its local variation is estimated by moving `mad', possibly in a large window.

### Value

A list with two components:

`fitted` |
estimated signal, |

`sigma` |
estimated local variation. |

[Package

*PROcess* version 1.3.2

Index]