 Hi could anyone help me how to bypass this problem

 IFOXM <- function(r, q , K) { (2*r*log(q*K))/(2+r)+((2-r)/(2+r))* 

 v1

 -(q/(2+r))* v2}

 v3 <- IFOXArist$Ln.Ut.1

 IFOXMArist <- nls(v3~ IFOXM (r, q , K),start=list(r=0.5, q=0.01,

 K=2000))

Error in numericDeriv(form[[3]], names(ind), env) : 

Missing value or an Infinity produced when evaluating the 

 model In addition: Warning message: NaNs produced in: log(x)

 

 Regards

 


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