Hi,
I’d like to know if is there any ROOT function or class to propagate errors of derived quantities.
I’m talking about this formula:
where F(x,y,z) is a function of x,y,z obtained through direct measurements.
Thanks!
Hi,
I’d like to know if is there any ROOT function or class to propagate errors of derived quantities.
I’m talking about this formula:
where F(x,y,z) is a function of x,y,z obtained through direct measurements.
Thanks!
Hi Riccardo,
In principle that’s best covered by modeling and symbolic calculus, and that in turn brings us to RooFit. @StephanH is that something that’s possible with RooFit?
Cheers, Axel.
No, RooFit doesn’t do this as far as I know. It uses numeric derivatives to do fits.
Unless @moneta knows another method, you can write down the formula 10.2 using the RichardsonDerivator. Make one derivator for each partial derivative, and then sum them in squares as usual.