[R] Fitting data from a spectrophotometer.

[TAPO (Thomas Agersten Poulsen)]

Dear R-list,

	It is not uncommon for laboratory equipment (e.g. spectrophotometers) to have a linear response in a certain interval and then go into saturation. I wonder if there is an R-function that models this; for instance by estimating the breakpoint and fitting a line below the breakpoint and a constant above.

Best regards
Thomas Poulsen

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Thomas Poulsen		      Research Scientist. PhD, MSc
Novozymes A/S			Protein Design / Bioinformatics
Brudelysvej 26, 1US.24		Phone:	+45 44 42 27 23
DK-2880 Bagsværd.