Hi 

I need to fit a logistic regression model using a saturable Michaelis-Menten 
function of my predictor x. The likelihood could be expressed as:

L = intercept + emax * x / (EC50+x)

Which I guess could be expressed as the following R model 

~ emax*x/(ec50+x)

As far as I know (please, correct me if I am wrong), fitting such a model is to 
not doable with glm, since the function is not linear. 

A Stackoverflow post recommends the bnlr function from the gnlm 
(https://stackoverflow.com/questions/45362548/nonlinear-logistic-regression-package-in-r)...
 I would be grateful for any opinion on this package or for any alternative 
recommendation of package/function.
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