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The calling of virtual methods has been removed from constructors & destructors: math_BissecNewton math_BrentMinimum math_FRPR math_FunctionSetRoot math_NewtonFunctionSetRoot math_NewtonMinimum math_Powell
138 lines
4.1 KiB
Plaintext
138 lines
4.1 KiB
Plaintext
-- Created on: 1991-05-14
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-- Created by: Laurent PAINNOT
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-- Copyright (c) 1991-1999 Matra Datavision
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-- Copyright (c) 1999-2014 OPEN CASCADE SAS
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--
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-- This file is part of Open CASCADE Technology software library.
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--
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-- This library is free software; you can redistribute it and/or modify it under
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-- the terms of the GNU Lesser General Public License version 2.1 as published
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-- by the Free Software Foundation, with special exception defined in the file
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-- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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-- distribution for complete text of the license and disclaimer of any warranty.
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--
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-- Alternatively, this file may be used under the terms of Open CASCADE
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-- commercial license or contractual agreement.
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class Powell from math
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---Purpose:
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-- This class implements the Powell method to find the minimum of
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-- function of multiple variables (the gradient does not have to be known).
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uses Vector from math, Matrix from math, MultipleVarFunction from math,
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Status from math, OStream from Standard
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raises NotDone from StdFail,
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DimensionError from Standard
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is
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Create(theFunction: in MultipleVarFunction;
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theTolerance: Real; theNbIterations: Integer = 200; theZEPS: Real = 1.0e-12)
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---Purpose: Constructor. Initialize new entity.
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returns Powell;
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Delete(me) is static;
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---Purpose: Destructor alias
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---C++: inline
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---C++: alias " Standard_EXPORT virtual ~math_Powell();"
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Perform(me: in out; theFunction: in out MultipleVarFunction; theStartingPoint: Vector; theStartingDirections: Matrix)
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---Purpose:
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-- Computes Powell minimization on the function F given
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-- theStartingPoint, and an initial matrix theStartingDirection
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-- whose columns contain the initial set of directions.
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-- The solution F = Fi is found when:
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-- 2.0 * abs(Fi - Fi-1) =< Tolerance * (abs(Fi) + abs(Fi-1) + ZEPS).
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is static;
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IsSolutionReached(me: in out; theFunction: in out MultipleVarFunction)
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---Purpose:
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-- Solution F = Fi is found when:
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-- 2.0 * abs(Fi - Fi-1) <= Tolerance * (abs(Fi) + abs(Fi-1)) + ZEPS.
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-- The maximum number of iterations allowed is given by NbIterations.
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---C++: inline
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returns Boolean is virtual;
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IsDone(me)
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---Purpose: Returns true if the computations are successful, otherwise returns false.
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---C++: inline
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returns Boolean
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is static;
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Location(me)
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---Purpose: returns the location vector of the minimum.
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-- Exception NotDone is raised if the minimum was not found.
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---C++: inline
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---C++: return const&
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returns Vector
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raises NotDone
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is static;
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Location(me; Loc: out Vector)
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---Purpose: outputs the location vector of the minimum in Loc.
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-- Exception NotDone is raised if the minimum was not found.
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-- Exception DimensionError is raised if the range of Loc is not
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-- equal to the range of the StartingPoint.
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---C++: inline
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raises NotDone,
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DimensionError
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is static;
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Minimum(me)
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---Purpose: Returns the value of the minimum.
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-- Exception NotDone is raised if the minimum was not found.
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---C++: inline
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returns Real
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raises NotDone
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is static;
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NbIterations(me)
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---Purpose: Returns the number of iterations really done during the
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-- computation of the minimum.
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-- Exception NotDone is raised if the minimum was not found.
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---C++: inline
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returns Integer
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raises NotDone
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is static;
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Dump(me; o: in out OStream)
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---Purpose: Prints information on the current state of the object.
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-- Is used to redefine the operator <<.
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is static;
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fields
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Done: Boolean;
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TheLocation: Vector is protected;
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TheMinimum: Real is protected;
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TheLocationError: Real is protected;
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Iter: Integer;
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TheStatus: Status;
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TheDirections: Matrix;
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PreviousMinimum: Real is protected;
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XTol: Real is protected;
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EPSZ: Real is protected;
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State: Integer;
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Itermax: Integer;
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end Powell;
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