Download MATLAB CURVE FITTING TOOLBOX - RELEASE NOTES User`s guide

fitoptions
Additional Fit Options
If Method is NearestInterpolant, LinearInterpolant, PchipInterpolant, or
CubicSplineInterpolant, there are no additional fit options.
If Method is SmoothingSpline, the SmoothingParam property is available to
configure the smoothing parameter. You can specify any value between 0 and
1. The default value depends on the data set.
If Method is LinearLeastSquares, the additional fit option properties shown
below are available.
4-108
Property
Description
Robust
Specifies whether to use the robust linear least squares
fitting method. The value can be {'off'} or 'on'.
Lower
A vector of lower bounds on the coefficients to be fitted. The
default value is an empty vector indicating that the fit is
not constrained by lower bounds. If bounds are specified,
the vector length must equal the number of coefficients. An
unconstrained lower bound is specified by -Inf.
Upper
A vector of upper bounds on the coefficients to be fitted. The
default value is an empty vector indicating that the fit is
not constrained by upper bounds. If bounds are specified,
the vector length must equal the number of coefficients. An
unconstrained upper bound is specified by Inf.