[R] How to fix an error in nonlinear regression

[Rui Barradas]

Hello,

This is cross posted [1] which is not well seen. Post and wait for an 
answer, which you got and are now asking the same, why? Maybe with time 
other answer will be posted to the first, original, question.


[1] 
https://stackoverflow.com/questions/62051714/how-can-i-fix-an-error-in-nonlinear-regression-nls-function


Rui Barradas

Às 20:43 de 27/05/20, Vahid Borji escreveu:
> Hello my R friends,
> I am using the below commands in R:
> 
> attach(Puromycin)
> Puromycin
> plot(Puromycin$conc,Puromycin$rate)
> mm=function(conc,vmax,k) vmax*conc/(k+conc)
> mm
> mm1=nls(rate~mm(conc,vmax,k),data=Puromycin,start=c(vmax=50,k=0.05),subset=state==”treated”)
> mm1
> 
> Unfortunately,  I receive the below error:
> 
> Error: unexpected input in
> "mm1=nls(rate~mm(conc,vmax,k),data=Puromycin,start=c(vmax=50,k=0.05),subset=state==”"
> 
> How can I fix this error?
> 
> 	[[alternative HTML version deleted]]
> 
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