baseline.irls: Iterative Restricted Least Squares

In baseline: Baseline Correction of Spectra

Iterative Restricted Least Squares

Description

An algorithm with primary smoothing and repeated baseline suppressions and regressions with 2nd derivative constraint

Usage

baseline.irls(spectra, lambda1 = 5, lambda2 = 9, maxit = 200, wi = 0.05)

Arguments

spectra	Matrix with spectra in rows
lambda1	2nd derivative constraint for primary smoothing
lambda2	2nd derivative constraint for secondary smoothing
maxit	Maximum number of iterations
wi	Weighting of positive residuals

Value

baseline	Matrix of baselines corresponding to spectra spectra
corrected	Matrix of baseline corrected spectra
smoothed	Matrix of primary smoothed spectra

Author(s)

Kristian Hovde Liland and Bjørn-Helge Mevik

Examples

data(milk)
bc.irls <- baseline(milk$spectra[1,, drop=FALSE], method='irls')
## Not run: 
	plot(bc.irls)

## End(Not run)

baseline documentation built on Nov. 18, 2023, 5:14 p.m.