PowerLogPolynomialSpectralElement.h

Go to the documentation of this file.

//# SpectralElement.h: Describes (a set of related) spectral lines
//# Copyright (C) 2001,2003,2004
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 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 Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//#        Internet email: aips2-request@nrao.edu.
//#        Postal address: AIPS++ Project Office
//#                        National Radio Astronomy Observatory
//#                        520 Edgemont Road
//#                        Charlottesville, VA 22903-2475 USA
//#
//#
//# $Id: SpectralElement.h 20652 2009-07-06 05:04:32Z Malte.Marquarding $

#ifndef COMPONENTS_POWERLOGPOLYNOMIALSPECTRALELEMENT_H
#define COMPONENTS_POWERLOGPOLYNOMIALSPECTRALELEMENT_H

#include <components/SpectralComponents/CompiledSpectralElement.h>

namespace casa { //# NAMESPACE CASA - BEGIN

// <summary>
// Describes the function most often used for determining spectral index plus higher order terms:
// y = c_0 * x**( c_1 + c_2*ln(x) + c_3*ln(x)**2 + ... )
// where c_1 is the traditional spectral index (alpha).
// </summary>

// <use visibility=export>

// <reviewed reviewer="" date="yyyy/mm/dd" tests="tSpectralFit" demos="">
// </reviewed>

// <prerequisite>
//   <li> <linkto module=SpectralElement>SpectralElement</linkto> module
// </prerequisite>
//
// <etymology>
// From power law, logarithm, and polynomial and spectral line and element
// </etymology>
//
// <synopsis>
// Describes a function that can be used to fit for spectral index and higher order terms

// </synopsis>
//
// <example>
// </example>
//
// <motivation>
// To have a spectral element representing a spectral index function.
// </motivation>


class PowerLogPolynomialSpectralElement: public SpectralElement {
public:

        /*
        // Constructor. The n coefficients c_i to be solved for are
        // c_0 * nu**(c_1 + c_2*log(x) + c_3*log(x)**2 + ... + c_(n-1)*log(x)**(n - 2))
        explicit PowerLogPolynomialSpectralElement(casacore::uInt n);
*/
        // Construct with the given parameters. See above constructor for order in which the parameters should
        // be supplied.
        PowerLogPolynomialSpectralElement(const casacore::Vector<casacore::Double> &param);

        // Copy constructor (deep copy)
        PowerLogPolynomialSpectralElement(const PowerLogPolynomialSpectralElement &other);

        ~PowerLogPolynomialSpectralElement();

        PowerLogPolynomialSpectralElement &operator=(
                const PowerLogPolynomialSpectralElement& other
        );

        SpectralElement* clone() const;
/*
private:
        void _makeFunction();
*/
};

std::ostream &operator<<(std::ostream& os, const PowerLogPolynomialSpectralElement& elem);


} //# NAMESPACE CASA - END

#endif