PCFSpectralElement.h

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//# 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.
//#
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#ifndef COMPONENTS_PCFSPECTRALELEMENT_H
#define COMPONENTS_PCFSPECTRALELEMENT_H

#include <components/SpectralComponents/SpectralElement.h>

namespace casa { //# NAMESPACE CASA - BEGIN

// <summary>
// Abstract base class that describes a spectral profile that can be parameterized
// by a peak value (amplitude), center, and width.
// </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 p(eak), c(enter), f(whm), and spectral line and element
// </etymology>
//
// <synopsis>
// Abstract base class that describes a spectral profile that can be parameterized
// by a peak value (amplitude), center, and width.
// </synopsis>
//
// <example>
// </example>
//
// <motivation>
// To have a class containing common methods for things like Gaussian, Lorentzian,
// and Voigt profiles.
// </motivation>

class PCFSpectralElement : public SpectralElement {
public:

        // to help avoid having to hard code parameter indices
        enum ParamType {
                AMP,
                CENTER,
                WIDTH
        };

        //#Destructor
        // Destructor
        virtual ~PCFSpectralElement();

//      PCFSpectralElement& operator=(const PCFSpectralElement &other);

        // Get amplitude
        Double getAmpl() const;
        // Get center value
        Double getCenter() const;
        // Get the width
        // <group>
        virtual Double getWidth() const;

        virtual Double getFWHM() const = 0;

        // get the integral from -inf to inf
        virtual Double getIntegral() const = 0;
        // </group>
        // Get amplitude error estimate
        Double getAmplErr() const;
        // Get center value error estimate
        Double getCenterErr() const;
        // Get the width error estimate
        // <group>
        virtual Double getWidthErr() const;
        virtual Double getFWHMErr() const = 0;


        virtual Double getIntegralErr() const;
        // </group>
        // Get error estimates of parameters


        void set(const Vector<Double>& param);

        void setAmpl(const Double ampl);

        void setCenter(const Double center);

        virtual void setWidth(const Double width);


        void fixAmpl(const Bool fix=True);
        void fixCenter(const Bool fix=True);
        void fixWidth(const Bool fix=True);
        void fixFWHM(const Bool fix=True) { fixWidth(fix); }

        // fix parameters via encoded string. If s contains a, fix amplitude. If s contains f, fix width.
        // If s contains c, fix center.
        void fixByString(const String& s);
        // </group>


        Bool fixedAmpl() const;
        Bool fixedCenter() const;
        Bool fixedWidth() const;

        Bool fixedFWHM() const { return fixedWidth(); }

protected:
        PCFSpectralElement(
                SpectralElement::Types type
        );

        // param should have three elements: amplitude, center, and width
        PCFSpectralElement(
                SpectralElement::Types type, const Vector<Double>& param
        );

        PCFSpectralElement(
                SpectralElement::Types type, Double amp,
                Double center, Double width
        );

        PCFSpectralElement(const PCFSpectralElement& other);


private:
        PCFSpectralElement();

        void _initFunction();

};

} //# NAMESPACE CASA - END

#endif