Table 1.

Summary of the parameters controlling the baseline estimation.

Description	R name	Suggested starting value
Second derivative penalty for smoothing.	lambda	Centred in noise band: 4 Below spectra: 0
Number of buckets for subsampling or a vector of start/end points of buckets.	int	1/10 of the number of wavelengths/masses/points
Initial half width of windows used for suppression.	hwi	Half the width of the widest peak (full width = centre point ± hwi)
Number of iterations for suppression.	it	10