/usr/include/casacore/scimath/Functionals/ConstantNDParam.h is in casacore-dev 2.2.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 | //# HyperPlaneParam.h: Parameters For a hyper plane function
//# Copyright (C) 2001,2002,2004,2005
//# 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
//#
//#
//# $Id$
#ifndef SCIMATH_CONSTANTNDPARAM_H
#define SCIMATH_CONSTANTNDPARAM_H
#include <casacore/casa/aips.h>
#include <casacore/scimath/Functionals/Function.h>
#include <casacore/casa/BasicSL/String.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
// <summary> Parameter handling for a constant function in a space of arbitrary dimensionality.
// </summary>
//
// <use visibility=local>
// <reviewed reviewer="" date="" tests="tConstant" demos="">
// </reviewed>
//
// <prerequisite>
// <li> <linkto class="FunctionParam">FunctionParam</linkto> class
// <li> <linkto class="Function">Function</linkto> class
// </prerequisite>
//
// <synopsis>
// This class forms a function of the form
// f(x<sub>0</sub>,x<sub>1</sub>,..,x<sub>m-1</sub>) = constant
// in an m-dimensional parameter space where
// x<sub>i</sub> are independent arguments.
//
// Since the <src>Constant</src> is a <src>Function</src>, the derivatives
// can be obtained as well (and in fact are 0 of course).
//
// The parameter interface (see
// <linkto class="FunctionParam">FunctionParam</linkto> class),
// is used to provide an interface to the
// <linkto module="Fitting">Fitting</linkto> classes.
//
// This class is in general used implicitly by the <src>Constant</src>
// class only.
// </synopsis>
//
// <example>
// <srcblock>
// form a constant function in 4-D space
// Constant<Double> constant(4); // constant in 4-D param space
// constant.parameters()[0] = 22;
// // Evaluate at x0=5, x3=7
// Vector<Double> x(4);
// x=0; x[0]=5; x[3]=7;
// cout << "constant value: " << constant(x) << endl;
// constant value: 22
// </srcblock>
// </example>
// <templating arg=T>
// <li> T should have standard numerical operators and exp() function. Current
// implementation only tested for real types (and their AutoDiffs).
// </templating>
// <thrown>
// <li> Assertion in debug mode if attempt is made to set a negative width
// <li> AipsError if incorrect parameter number specified.
// </thrown>
// <motivation>
// This class was created because HyperPlane does not support a constant
// offset and modifying that class really required an interface change
// (ie that the constant offset be at the beginning of the parameter vector
// and that the parameter vector increase by one) so rather than breaking
// any code that already used HyperPlane I simply made a trivial Constant
// class.
// </motivation>
// <todo asof="2011/07/01">
// <li> Nothing I know of
// </todo>
template<class T> class ConstantNDParam : public Function<T>
{
public:
//# Constructors
// Construct a constant in m-dimensional space. By
// default, the constant value is initialized to zero.
// <group>
explicit ConstantNDParam(uInt m=0);
// </group>
// Copy constructor (deep copy)
// <group>
ConstantNDParam(const ConstantNDParam &other);
template <class W>
ConstantNDParam(const ConstantNDParam<W> &other) :
Function<T>(other), _ndim(other.ndim()) {}
// </group>
// Copy assignment (deep copy)
ConstantNDParam<T> &operator=(const ConstantNDParam<T> &other);
// Destructor
virtual ~ConstantNDParam();
//# Operators
// Comparisons.
// HyperPlanes are equal if they are of the same order and have the same
// parameters
// <group>
Bool operator==(const ConstantNDParam<T> &other) const {
return (this->param_p == other.param_p); };
Bool operator!=(const ConstantNDParam<T> &other) const {
return (this->param_p != other.param_p); };
// </group>
//# Member functions
// Give name of function
virtual const String &name() const { static String x("constant");
return x; };
// What is the dimension of the parameter list
virtual uInt ndim() const { return _ndim; };
//# Make members of parent classes known.
protected:
using Function<T>::param_p;
public:
using Function<T>::nparameters;
private:
uInt _ndim;
};
} //# NAMESPACE CASACORE - END
#ifndef CASACORE_NO_AUTO_TEMPLATES
#include <casacore/scimath/Functionals/ConstantNDParam.tcc>
#endif //# CASACORE_NO_AUTO_TEMPLATES
#endif
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