template<class Func>
class ROOT::Math::LSResidualFunc< Func >
LSResidualFunc class description.
Internal class used for accessing the residuals of the Least Square function and their derivatives which are estimated numerically using GSL numerical derivation. The class contains a pointer to the fit method function and an index specifying the i-th residual and wraps it in a multi-dim gradient function interface ROOT::Math::IGradientFunctionMultiDim. The class is used by ROOT::Math::GSLNLSMinimizer (GSL non linear least square fitter)
Definition at line 135 of file GSLNLSMinimizer.cxx.
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| | LSResidualFunc () |
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| | LSResidualFunc (const Func &func, unsigned int i) |
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| | LSResidualFunc (const LSResidualFunc< Func > &rhs) |
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| IMultiGenFunction * | Clone () const override |
| | Clone a function.
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| void | FdF (const double *x, double &f, double *g) const override |
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| void | Gradient (const double *x, double *g) const override |
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| unsigned int | NDim () const override |
| | Retrieve the dimension of the function.
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| LSResidualFunc< Func > & | operator= (const LSResidualFunc< Func > &rhs) |
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| T | Derivative (const T *x, unsigned int icoord, T *previous_grad, T *previous_g2, T *previous_gstep) const |
| | In some cases, the derivative algorithm will use information from the previous step, these can be passed in with this overload.
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| T | Derivative (const T *x, unsigned int icoord=0) const |
| | Return the partial derivative with respect to the passed coordinate.
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| virtual void | FdF (const T *x, T &f, T *df) const |
| | Optimized method to evaluate at the same time the function value and derivative at a point x.
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| virtual void | Gradient (const T *x, T *grad) const |
| | Evaluate all the vector of function derivatives (gradient) at a point x.
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| virtual void | GradientWithPrevResult (const T *x, T *grad, T *previous_grad, T *previous_g2, T *previous_gstep) const |
| | In some cases, the gradient algorithm will use information from the previous step, these can be passed in with this overload.
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| bool | HasGradient () const |
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| virtual bool | returnsInMinuit2ParameterSpace () const |
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| virtual | ~IBaseFunctionMultiDimTempl ()=default |
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| T | operator() (const T *x) const |
| | Evaluate the function at a point x[].
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Public Member Functions inherited from ROOT::Math::IGradientFunctionMultiDimTempl< T >