I’m attempting to perform numerical minimization, as in https://root.cern.ch/doc/master/NumericalMinimization_8C.html.

Firstly, how can one pass constants to the objective function (e.g. I may wish to minimize some function with a constant parameter that may be set, such as the constants `a`

and `b`

in the Rosenbrock function)?

It looks like `SetFixedVariable`

may be used for this. Is it possible to pass constants by other means (in my case, I may want to pass a `std::vector`

of `TVector3`

’s to the objective function, which will operate on their components, the result of which will ultimately become mathematical constants of the function)?

Secondly, is there a clean way to set a large number of free variables? Currently, I have an array of `12`

free variables, and I set them with `12`

lines like:

```
minimizer->SetVariable(0, 'x1', variable[0], step[0]);
...
minimizer->SetVariable(11, 'x11', variable[11], step[11]);
```

I see `SetVariables()`

in the docs, however I don’t understand it’s usage. It would be nice to e.g. be able to simply pass the array of initial estimates.