LocalMaximaSG {ptairMS} | R Documentation

## Find local maxima with Savitzky Golay filter

### Description

Apply Savitzky Golay filter to the spectrum and find local maxima such that : second derivate Savitzky Golay filter < 0 and first derivate = 0 and intensity > minPeakHeight

### Usage

    LocalMaximaSG(sp, minPeakHeight = -Inf, noiseacf = 0.1, d = 3)

### Arguments

`sp` | the array of spectrum values
`minPeakHeight` | minimum intensity of a peak
`noiseacf` | autocorrelation of the noise
`d` | the degree of Savitzky Golay filter, defalut 3

### Value

array with peak's index in the spectrum

### Examples

    spectrum<-dnorm(x=seq(-5,5,length.out = 100))
    index.max<-LocalMaximaSG(spectrum)

[Package ptairMS version 1.0.1 Index]