[R] In optim() function, second parameter in par() missing

[colstat]

Hi, David
I happened to see this http://www.unc.edu/~monogan/computing/r/MLE_in_R.pdf
And they wrote optim(c(0,1),normal.lik1,y=y,method="BFGS")

But it doesn't actually work, like you mentioned, it only takes 2
parameters, is that the reason why.

R gives this error
> optim(par=parameters, normal.lik, x, method="BFGS")
Error in fn(par, ...) : argument "parameters" is missing, with no default


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