LorentzianSpectralElement.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.
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#ifndef COMPONENTS_LORENTZIANSPECTRALELEMENT_H
#define COMPONENTS_LORENTZIANSPECTRALELEMENT_H

#include <components/SpectralComponents/PCFSpectralElement.h>

namespace casa { //# NAMESPACE CASA - BEGIN

// <summary>
// Describes a single Lorentzian spectral profile
// </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 Lorentzian and spectral profile and element
// </etymology>
//
// <synopsis>
// The LorentzianSpectralElement class describes a Lorentzian spectral profile.
// </synopsis>
//
// <example>
// </example>
//
// <motivation>
// To have a container for data descrbing a Lorentzian spectral profile for fitting to an observed spectrum
// </motivation>

class LorentzianSpectralElement : public PCFSpectralElement {
public:

        // has amp = 1, center = 0, and fwhm = 1
        LorentzianSpectralElement();

        // Construct with given type and values
        // <thrown>
        //   <li> AipsError if fwhm == 0.0 or amp == 0.0
        // </thrown>
        LorentzianSpectralElement(
                const Double ampl, const Double center,
                const Double fwhm
        );

        LorentzianSpectralElement(const Vector<Double>& param);

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

        ~LorentzianSpectralElement();

        SpectralElement* clone() const;

        // Assignment (copy semantics)
        LorentzianSpectralElement& operator=(const LorentzianSpectralElement& other);

        // Evaluate the value of the profile at x
        Double operator()(const Double x) const;


        // get the integral of the function
        Double getIntegral() const;


};

ostream &operator<<(ostream& os, const LorentzianSpectralElement& elem);

} //# NAMESPACE CASA - END

#endif