sgolayDeriv: Calculate smoothed derivates

In mQTL: Metabolomic Quantitative Trait Locus Mapping

Description

Calculate smoothed derivates using Savitzky-Golay filter

Usage

sgolayDeriv(dpSpectr, iOrder, iFrameLen, j)

Arguments

dpSpectr	input spectrum
iOrder	polynomial order of Savitzky - Golay filter
iFrameLen	Savitzky-Golay frame length in ppm scale
j	order of derivative

Value

jth dervitative of the spectrum

Author(s)

Lyamine Hedjazi

See Also

sgolay

Examples

## Data

Sp=matrix(rnorm(10*13454,mean=0,sd=1), nrow=10,ncol=13454)

## Peak picking
Spectrum<-Sp[10,]
iOrder <- 3
iFrameLen<- 11
j<-2

SpDerivs=sgolayDeriv(Spectrum,iOrder,iFrameLen,j)

mQTL documentation built on May 1, 2019, 7:30 p.m.