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//# tCombiFunction.cc: Test the CombiFunction class
//# Copyright (C) 2001,2002
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This program is free software; you can redistribute it and/or modify it
//# under the terms of the GNU General Public License as published by the Free
//# Software Foundation; either version 2 of the License, or (at your option)
//# any later version.
//#
//# This program 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 General Public License for
//# more details.
//#
//# You should have received a copy of the GNU General Public License along
//# with this program; 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: casa-feedback@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
#include <casacore/scimath/Functionals/CombiFunction.h>
#include <casacore/scimath/Functionals/Polynomial.h>
#include <casacore/casa/Arrays/Vector.h>
#include <casacore/casa/Arrays/ArrayLogical.h>
#include <casacore/casa/Arrays/ArrayMath.h>
#include <casacore/scimath/Mathematics/AutoDiff.h>
#include <casacore/scimath/Mathematics/AutoDiffA.h>
#include <casacore/scimath/Mathematics/AutoDiffIO.h>
#include <casacore/scimath/Mathematics/AutoDiffMath.h>
#include <casacore/casa/BasicSL/Constants.h>
#include <casacore/casa/BasicMath/Math.h>
#include <casacore/casa/Utilities/Assert.h>
#include <casacore/casa/iostream.h>
#include <casacore/casa/namespace.h>
int main() {
int i;
// construct a linear combination of functions: a(0)+a(1)*x+a(2)*x^2
Polynomial<Double> constant(0);
Polynomial<Double> linear(1);
Polynomial<Double> square(2);
constant[0] = 1.0; // 1
linear[1] = 1.0; // x
square[2] = 1.0; // x^2
// The default constructor -- no functions, no parameters, nothing, the
// function operator returns a 0.
CombiFunction<Double> combination;
// Add a function. All functions must have the same <src>ndim()</src>
// as the first one. Returns the (zero relative) number of the function
// just added. In the meantime, the coefficient a(i) which is also the
// ith available parameter, and the mask for the "available parameter" are
// initialized with "one" and "True," respectively.
combination.addFunction(constant);
combination.addFunction(linear);
combination.addFunction(square);
// Make this object a copy of other.
//CombiFunction(const CombiFunction<T, T> &other);
CombiFunction<Double> comb2(combination);
// Make this object a copy of other.
//CombiFunction<T> &operator=(const CombiFunction<T> &other);
comb2 = combination;
// Return the total number of coefficients. The number is equal to the
// number of functins that have been added.
// uInt nCoefficients() const;
cout << "n: " <<
combination.nFunctions() << ", " <<
combination.nparameters() << ", " <<
comb2.nFunctions() << ", " << endl;
AlwaysAssertExit(combination.nFunctions() == 3 &&
combination.nparameters() == comb2.nFunctions());
// Return the total number of functions. The number is equal to the
// number of functins that have been added.
//uInt nFunctions() const;
AlwaysAssertExit(combination.nFunctions() == 3 &&
combination.nFunctions() == comb2.nFunctions());
Vector<Double> v(3);
// Set the value of a coefficient.
// f(x) = 10 + 11*x + 12*x^2
for (i = 0; i < 3; i++) {
combination[i] = i+10;
AlwaysAssertExit(combination[i] == Double(i+10));
v(i) = i+10;
}
// Set all coefficients at once.
combination.parameters().setParameters(v);
AlwaysAssertExit(allEQ(combination.parameters().getParameters(), v));
// Return a reference to a specific Function in the combination.
// f(x) = 10 + 11*x + 12*x^2
AlwaysAssertExit((combination.function(0))(10) == Double(1));
AlwaysAssertExit((combination.function(1))(10) == Double(10));
AlwaysAssertExit((combination.function(2))(10) == Double(100));
// Evaluate the linear combination at <src>x</src>.
//virtual T operator()(const Vector<T> &x) const;
// Evaluate the linear combination at <src>x</src>.
// This operator is used when combination is 1D
//virtual T operator()(const T &x) const;
// f(x) = 10 + 11*x + 12*x^2
v.resize(1);
v(0) = 5;
AlwaysAssertExit((combination(v) - Double(36365)) < 1.e-6);
AlwaysAssertExit((combination(5) - Double(36365)) < 1.e-6);
// Returns the dimension of functions in the linear combination
//virtual uInt ndim() const;
AlwaysAssertExit(combination.ndim() == 1);
cout << "OK" << endl;
return 0;
}
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