0 success, 1 iteration limit reached, 10 Nelder-Mead simplex degenerate, 51 / 52 L-BFGS-B warning / error
Evaluations of fn and gr (NaN where R has NA)
OptionalhessianThe numerically differentiated Hessian at par, when hessian is true (array of rows).
L-BFGS-B's final message; null for the other methods
The best parameters found.
fn at par.
R's warnings
Result of optim