[R] probit etc. for dose-response modeling

[Johannes Ranke]

Hi again

I found that the nonlinear least squares method also works nicely:

	library(nls)
	model <- nls(viability ~ pnorm(-log10(conc),-EC50,slope),data=data, \
		 start=list(EC50=1.8,slope=0.8))

Is there an advantage of using glm, and how would this work in this case?

Johannes

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