sgolayDeriv: Calculate smoothed derivates
In mQTL.NMR: Metabolomic Quantitative Trait Locus Mapping for 1H NMR data

Description Usage Arguments Value Author(s) See Also Examples

Calculate smoothed derivates using Savitzky-Golay filter

1	sgolayDeriv(dpSpectr, iOrder, iFrameLen, j)

`dpSpectr`	a vector specifying the input spectrum
`iOrder`	polynomial order of Savitzky - Golay filter
`iFrameLen`	Savitzky-Golay frame length in ppm scale
`j`	order of derivative

jth dervitative of the spectrum

Lyamine Hedjazi

sgolay

## 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)