The Kalman Filter fitting method

The Kalman Filter is a common fitting algorithm which ....

// set the maximum allowed local chi2
void set_max_local_chi2ndf(double chi2ndf);
// set the number of allowed consecutive extrapolation failures
void set_max_consecutive_extrap_failures(int n);
// set the number of allowed outliers
void set_number_allowed_outliers(int n);
// use the back filter instead of the smoother
void set_use_back_filtering(bool use);