TMtxOptimization.RealFunction Property

Defines the function to be minimized.

Pascal

property RealFunction: TRealFunction;

Defines the function to be minimized. The RealFunction must be of the TRealFunction type. Before you write actual function, set the Parameters, Constants and PConstants array size by using the:

crefVariableParameters vector Length, Size or SetIt method,
crefConstantParameters vector Length, Size or SetIt method,
crefSetObjects method

Example

Define a function of two variables and one additional constant parameter.

1) Set the VariableParameters, ConstantParameters size and (optionally) initial value:

MtxOptimization.VariableParameters.SetIt(false,[1,1]); MtxOptimization.ConstantParameters.SetIt(false,[2.5]);

MtxOptimization->VariableParameters->SetIt(false,OPENARRAY(double,(1,1))); MtxOptimization->ConstantParameters->SetIt(false,OPENARRAY(double,(2.5)));

Note that all values are real.

2) Define the actual function:

function TestFunction(const Pars: TVec; const Consts: TVec;const ObjConsts: Array of TObject): double; begin TestFunction := 2*Pars[0]+Sqrt(Pars[1]-Consts[0]); end;

double __fastcall BTestFunction(TVec* const Parameters, TVec* const Constants, System::TObject* const * ObjConst, const int ObjConst_Size) { double* Pars = Parameters->PValues1D(0); return 2*Pars[0] + Sqrt(Pars[1]-Consts[0]); }

Here Pars = VariableParameters.Values and Consts = ConstantParameters.Values.

3) "Connect" the function with TMtxOptimization component:

MtxOptimization.RealFunction := TestFunction;

MtxOptimization->RealFunction = TestFunction;

Please note that the internal algorithm does not check if Parameters, Constants, PConstants array size is the same as VariableParameters.Values, ConstantParameters.Values and SetPointers array size.

TMtxOptimization Class, TMtxOptimization Members, MtxVecTools Namespace, public, Example, See Also

What do you think about this topic? Send feedback!