/usr/include/openturns/OrthogonalUniVariatePolynomialFactory.hxx is in libopenturns-dev 1.9-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* @brief This an abstract class for 1D polynomial factories
*
* Copyright 2005-2017 Airbus-EDF-IMACS-Phimeca
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef OPENTURNS_ORTHOGONALUNIVARIATEPOLYNOMIALFACTORY_HXX
#define OPENTURNS_ORTHOGONALUNIVARIATEPOLYNOMIALFACTORY_HXX
#include "openturns/PersistentObject.hxx"
#include "openturns/Point.hxx"
#include "openturns/PersistentCollection.hxx"
#include "openturns/OrthogonalUniVariatePolynomial.hxx"
#include "openturns/Distribution.hxx"
BEGIN_NAMESPACE_OPENTURNS
/**
* @class OrthogonalUniVariatePolynomialFactory
*
* This an abstract class for 1D polynomial factories
*/
class OT_API OrthogonalUniVariatePolynomialFactory
: public PersistentObject
{
CLASSNAME;
public:
typedef OrthogonalUniVariatePolynomial::Coefficients Coefficients;
typedef Collection<Coefficients> CoefficientsCollection;
typedef PersistentCollection<Coefficients> CoefficientsPersistentCollection;
typedef Collection<OrthogonalUniVariatePolynomial> OrthogonalUniVariatePolynomialCollection;
enum ParameterSet { ANALYSIS, PROBABILITY };
/** Constructor */
explicit OrthogonalUniVariatePolynomialFactory(const Distribution & measure);
/** Virtual constructor */
virtual OrthogonalUniVariatePolynomialFactory * clone() const;
/** String converter */
virtual String __repr__() const;
/** The method to get the polynomial of any degree. */
OrthogonalUniVariatePolynomial build(const UnsignedInteger degree) const;
/** Build the 3 terms recurrence coefficients up to the needed degree */
CoefficientsCollection buildRecurrenceCoefficientsCollection(const UnsignedInteger degree) const;
/** Build the coefficients of the polynomial of the needed degree */
Coefficients buildCoefficients(const UnsignedInteger degree) const;
/** Roots of the polynomial of degree n as the eigenvalues of the associated matrix */
Point getRoots(const UnsignedInteger n) const;
/** Nodes and weights of the polynomial of degree n as the eigenvalues of the associated matrix, to build quadrature rules */
Point getNodesAndWeights(const UnsignedInteger n,
Point & weights) const;
/** Measure accessor */
Distribution getMeasure() const;
/** Method save() stores the object through the StorageManager */
void save(Advocate & adv) const;
/** Method load() reloads the object from the StorageManager */
void load(Advocate & adv);
/** Calculate the coefficients of recurrence a0, a1, a2 such that
Pn+1(x) = (a0 * x + a1) * Pn(x) + a2 * Pn-1(x) */
virtual Coefficients getRecurrenceCoefficients(const UnsignedInteger n) const;
protected:
friend class Factory<OrthogonalUniVariatePolynomialFactory>;
/** Default constructor */
OrthogonalUniVariatePolynomialFactory();
/** Cache initialization */
virtual void initializeCache();
/** The distribution of the particular Orthonormal polynomial */
Distribution measure_;
/** A cache to save already computed coefficients */
mutable CoefficientsPersistentCollection coefficientsCache_;
/** A cache to save already computed recurrence coefficients */
mutable CoefficientsPersistentCollection recurrenceCoefficientsCache_;
/** A cache to save already computed polynomials */
mutable OrthogonalUniVariatePolynomialCollection polynomialsCache_;
} ; /* class OrthogonalUniVariatePolynomialFactory */
END_NAMESPACE_OPENTURNS
#endif /* OPENTURNS_ORTHOGONALUNIVARIATEPOLYNOMIALFACTORY_HXX */
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