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move paradiseo/eo to deprecated/ before merge with eodev

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Johann Dreo 2012-10-05 15:12:12 +02:00
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deprecated/eo/contrib/mathsym/regression/Scaling.h Normal file
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/*
* Copyright (C) 2005 Maarten Keijzer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef SCALING_H_
#define SCALING_H_
#include "shared_ptr.h"
#include <valarray>
#include <iostream>
#include <string>
class TargetInfo;
class ScalingBase {
public:
virtual ~ScalingBase() {}
std::valarray<double> apply(const std::valarray<double>& x) {
std::valarray<double> xtmp = x;
transform(xtmp);
return xtmp;
}
virtual double transform(double input) const = 0;
virtual void transform(std::valarray<double>& inputs) const = 0;
virtual std::ostream& print(std::ostream& os, std::string str) const = 0;
virtual std::valarray<double> transform(const std::valarray<double>& inputs) const = 0;
};
typedef shared_ptr<ScalingBase> Scaling;
class LinearScaling : public ScalingBase {
double a,b;
public:
LinearScaling() : a(0.0), b(1.0) {}
LinearScaling(double _a, double _b) : a(_a), b(_b) {}
double transform(double input) const { input *=b; input += a; return input; }
void transform(std::valarray<double>& inputs) const { inputs *= b; inputs += a; }
std::valarray<double> transform(const std::valarray<double>& inputs) const {
std::valarray<double> y = a + b * inputs;
return y;
}
double intercept() const { return a; }
double slope() const { return b; }
std::ostream& print(std::ostream& os, std::string str) const {
os.precision(16);
os << a << " + " << b << " * " << str;
return os;
}
};
class NoScaling : public ScalingBase{
void transform(std::valarray<double>&) const {}
double transform(double input) const { return input; }
std::valarray<double> transform(const std::valarray<double>& inputs) const { return inputs; }
std::ostream& print(std::ostream& os, std::string str) const { return os << str; }
};
extern Scaling slope(const std::valarray<double>& inputs, const TargetInfo& targets); // slope only
extern Scaling ols(const std::valarray<double>& inputs, const TargetInfo& targets);
extern Scaling wls(const std::valarray<double>& inputs, const TargetInfo& targets);
extern Scaling med(const std::valarray<double>& inputs, const TargetInfo& targets);
extern Scaling ols(const std::valarray<double>& inputs, const std::valarray<double>& outputs);
extern double mse(const std::valarray<double>& y, const TargetInfo& t);
extern double rms(const std::valarray<double>& y, const TargetInfo& t);
extern double mae(const std::valarray<double>& y, const TargetInfo& t);
// Todo Logistic Scaling
#endif