LocalMaximaSG: Find local maxima with Savitzky Golay filter

In camilleroquencourt/ptairMS: Pre-processing PTR-TOF-MS Data

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)

camilleroquencourt/ptairMS documentation built on April 24, 2024, 9:03 p.m.