Hello,

I fit a data histogram (dh) with a function (model) and I would like to retrieve the value of the post-fit function and its error in a given x.

What I do to retrieve the value of the function in a given x is:

[code]

RooFitResult* filters = model.fitTo(dh, RooFit::Minimizer(“Minuit”, “migradimproved”), RooFit::NumCPU(4), RooFit::Save(true), RooFit::Extended(true), RooFit::PrintLevel(-1));

```
RooCurve* curve = frame->getCurve("main_curve");
pdf = curve->Eval( x );[/code]
```

Is this the correct way to proceed?

I didn’t manage to get the error of the function in a given x, would you have any suggestion?

Thanks a lot for your help.

Cheers!