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2017 Jun 23
0
optim() has a non-consistent way to send parameter for different methods
...one, of course, we know which parameter it is, but it makes things non-consistent between methods. It would be better that same convention is used for different method. Marc Tested in R-3.4.0 For example, here: @@@@@@@@@@@ Method BFGS @@@@@@@@@@@ # The names of values in par are transmitted fitnorm_meansd<-function(par, val) { print(par) -sum(dnorm(x=val, mean=par["mean"], sd=par["sd"], log = TRUE)) } val <- rnorm(100, mean=20, sd=2) p<-c(mean=20, sd=2) result<-optim(par=p, fn=fitnorm_meansd, val=val, method="BFGS") The print(par) shows the named v...