right now, error analysis stuff is spread out in super weird way
since error analysis is such a fundamental part of fitting any model, this deserves separate treatment
make a plan to make this work in library mode, then implement somewhere in the calculator/solver
as title says
right now, error analysis stuff is spread out in super weird way since error analysis is such a fundamental part of fitting any model, this deserves separate treatment make a plan to make this work in library mode, then implement somewhere in the calculator/solver