({{, (RefLink[FitRegularization, paclet:ref/FitRegularization]) 
is an option for (RefLink[Fit, paclet:ref/Fit]) and (RefLink[FindFit, paclet:ref/FindFit]) that specifies a regularization for fitting a model.}})

OpenersNotesSection(Spacer1)Details

(RefLink[Fit, paclet:ref/Fit]) and (RefLink[FindFit, paclet:ref/FindFit]) typically find parameters pars that minimize the norm(res) where res is the residual vector defined as the difference between the model and data response at the data coordinate points. With (RefLink[FitRegularization, paclet:ref/FitRegularization])->rfun, the objective to minimize is norm(residuals)+rfun(pars)

(RefLink[Fit, paclet:ref/Fit]) and (RefLink[FindFit, paclet:ref/FindFit]) find parameters {(Subscript[a, 1]),…,(Subscript[a, n])} that minimize the norm ‖r‖ where r is the residual vector with components given by (Subscript[r, j])=model((Subscript[x, j]),(Subscript[y, j]),…)-(Subscript[v, j]) where {(Subscript[x, j]),(Subscript[y, j]),…} are the data coordinates and (Subscript[v, j]) are the data values and model also depends on the parameters.

Possible settings include: