search for: cytb

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2008 Nov 06
1
nls: Fitting two models at once?
...automate some analyses from SigmaPlot using R. R is a great help for me so far! But the following problem makes me go nuts. I have two spectra, both have to be fitted to reference data. Problem: the both spectra are connected in some way: the stoichiometry of coefficients "cytf.v"/"cytb.v" is 1/2. {{In the SigmaPlot workflow one has to copy the two spectra into one column beneath each other and the two spectra are somehow treated as one curve - like in http://home.arcor.de/ballaschk/cytbf-help/sigmaplot%20formula.png}} Can anybody help? :( I tried to condense everything to...