baseline: baseline.irls – R documentation

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baseline.irls

Iterative Restricted Least Squares

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

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

`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

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

Kristian Hovde Liland and Bjørn-Helge Mevik

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

## End(Not run)

Baseline Correction of Spectra

v1.3-1

GPL-2

Authors

Kristian Hovde Liland [aut, cre], Bjørn-Helge Mevik [aut], Roberto Canteri [ctb]

Initial release

2020-09-10