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/*!
* \file
* \brief Help functions to make functions with vec and mat as arguments
* \author Tony Ottosson and Adam Piatyszek
*
* -------------------------------------------------------------------------
*
* IT++ - C++ library of mathematical, signal processing, speech processing,
* and communications classes and functions
*
* Copyright (C) 1995-2008 (see AUTHORS file for a list of contributors)
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* -------------------------------------------------------------------------
*/
#ifndef HELP_FUNCTIONS_H
#define HELP_FUNCTIONS_H
#ifndef _MSC_VER
# include <itpp/config.h>
#else
# include <itpp/config_msvc.h>
#endif
#include <itpp/base/mat.h>
namespace itpp {
//! \addtogroup miscfunc
//!@{
//! Help function to call for a function: Vec<T> function(Vec<T>)
template<typename T>
inline Vec<T> apply_function(T (*f)(T), const Vec<T>& v)
{
Vec<T> out(v.length());
for (int i = 0; i < v.length(); i++) {
out(i) = f(v(i));
}
return out;
}
//! Help function to call for a function: Vec<T> function(const Vec<T>&)
template<typename T>
inline Vec<T> apply_function(T (*f)(const T&), const Vec<T>& v)
{
Vec<T> out(v.length());
for (int i = 0; i < v.length(); i++) {
out(i) = f(v(i));
}
return out;
}
//! Help function to call for a function: Mat<T> function(Mat<T>&)
template<typename T>
inline Mat<T> apply_function(T (*f)(T), const Mat<T>& m)
{
Mat<T> out(m.rows(), m.cols());
for (int i = 0; i < m.rows(); i++) {
for (int j = 0; j < m.cols(); j++) {
out(i, j) = f(m(i, j));
}
}
return out;
}
//! Help function to call for a function: Mat<T> function(const Mat<T>&)
template<typename T>
inline Mat<T> apply_function(T (*f)(const T&), const Mat<T>& m)
{
Mat<T> out(m.rows(), m.cols());
for (int i = 0; i < m.rows(); i++) {
for (int j = 0; j < m.cols(); j++) {
out(i, j) = f(m(i, j));
}
}
return out;
}
//! Help function to call for a function: Vec<T> function(T, Vec<T>)
template<typename T>
inline Vec<T> apply_function(T (*f)(T, T), const T& x, const Vec<T>& v)
{
Vec<T> out(v.length());
for (int i = 0; i < v.length(); i++) {
out(i) = f(x, v(i));
}
return out;
}
//! \brief Help function to call for a function:
//! Vec<T> function(const T&, const Vec<T>&)
template<typename T>
inline Vec<T> apply_function(T (*f)(const T&, const T&), const T& x,
const Vec<T>& v)
{
Vec<T> out(v.length());
for (int i = 0; i < v.length(); i++) {
out(i) = f(x, v(i));
}
return out;
}
//! Help function to call for a function: Mat<T> function(T, Mat<T>)
template<typename T>
inline Mat<T> apply_function(T (*f)(T, T), const T& x, const Mat<T>& m)
{
Mat<T> out(m.rows(), m.cols());
for (int i = 0; i < m.rows(); i++) {
for (int j = 0; j < m.cols(); j++) {
out(i, j) = f(x, m(i, j));
}
}
return out;
}
//! \brief Help function to call for a function:
//! Mat<T> function(const T&, const Mat<T>&)
template<typename T>
inline Mat<T> apply_function(T (*f)(const T&, const T&), const T& x,
const Mat<T>& m)
{
Mat<T> out(m.rows(), m.cols());
for (int i = 0; i < m.rows(); i++) {
for (int j = 0; j < m.cols(); j++) {
out(i, j) = f(x, m(i, j));
}
}
return out;
}
//! Help function to call for a function: Vec<T> function(Vec<T>, T)
template<typename T>
inline Vec<T> apply_function(T (*f)(T, T), const Vec<T>& v, const T& x)
{
Vec<T> out(v.length());
for (int i = 0; i < v.length(); i++) {
out(i) = f(v(i), x);
}
return out;
}
//! \brief Help function to call for a function:
//! Vec<T> function(const Vec<T>&, const T&)
template<typename T>
inline Vec<T> apply_function(T (*f)(const T&, const T&), const Vec<T>& v,
const T& x)
{
Vec<T> out(v.length());
for (int i = 0; i < v.length(); i++) {
out(i) = f(v(i), x);
}
return out;
}
//! Help function to call for a function: Mat<T> function(Mat<T>, T)
template<typename T>
inline Mat<T> apply_function(T (*f)(T, T), const Mat<T>& m, const T& x)
{
Mat<T> out(m.rows(), m.cols());
for (int i = 0; i < m.rows(); i++) {
for (int j = 0; j < m.cols(); j++) {
out(i, j) = f(m(i, j), x);
}
}
return out;
}
//! \brief Help function to call for a function:
//! Mat<T> function(const Mat<T>&, const T&)
template<typename T>
inline Mat<T> apply_function(T (*f)(const T&, const T&), const Mat<T>& m,
const T& x)
{
Mat<T> out(m.rows(), m.cols());
for (int i = 0; i < m.rows(); i++) {
for (int j = 0; j < m.cols(); j++) {
out(i, j) = f(m(i, j), x);
}
}
return out;
}
//!@}
//! \cond
// ----------------------------------------------------------------------
// Instantiations
// ----------------------------------------------------------------------
#ifdef HAVE_EXTERN_TEMPLATE
extern template vec apply_function(double (*f)(double), const vec &v);
extern template cvec apply_function(std::complex<double> (*f)(const std::complex<double> &),
const cvec &v);
extern template svec apply_function(short (*f)(short), const svec &v);
extern template ivec apply_function(int (*f)(int), const ivec &v);
extern template bvec apply_function(bin (*f)(bin), const bvec &v);
extern template mat apply_function(double (*f)(double), const mat &m);
extern template cmat apply_function(std::complex<double> (*f)(const std::complex<double> &),
const cmat &m);
extern template smat apply_function(short (*f)(short), const smat &m);
extern template imat apply_function(int (*f)(int), const imat &m);
extern template bmat apply_function(bin (*f)(bin), const bmat &m);
extern template vec apply_function(double (*f)(double, double), const double& x, const vec &v);
extern template cvec apply_function(std::complex<double> (*f)(const std::complex<double> &,
const std::complex<double> &),
const std::complex<double>& x, const cvec &v);
extern template svec apply_function(short (*f)(short, short), const short& x, const svec &v);
extern template ivec apply_function(int (*f)(int, int), const int& x, const ivec &v);
extern template bvec apply_function(bin (*f)(bin, bin), const bin& x, const bvec &v);
extern template mat apply_function(double (*f)(double, double), const double& x, const mat &m);
extern template cmat apply_function(std::complex<double> (*f)(const std::complex<double> &,
const std::complex<double> &),
const std::complex<double>& x, const cmat &m);
extern template smat apply_function(short (*f)(short, short), const short& x, const smat &m);
extern template imat apply_function(int (*f)(int, int), const int& x, const imat &m);
extern template bmat apply_function(bin (*f)(bin, bin), const bin& x, const bmat &m);
extern template vec apply_function(double (*f)(double, double), const vec &v, const double& x);
extern template cvec apply_function(std::complex<double> (*f)(const std::complex<double> &,
const std::complex<double> &),
const cvec &v, const std::complex<double>& x);
extern template svec apply_function(short (*f)(short, short), const svec &v, const short& x);
extern template ivec apply_function(int (*f)(int, int), const ivec &v, const int& x);
extern template bvec apply_function(bin (*f)(bin, bin), const bvec &v, const bin& x);
extern template mat apply_function(double (*f)(double, double), const mat &m, const double& x);
extern template cmat apply_function(std::complex<double> (*f)(const std::complex<double> &,
const std::complex<double> &),
const cmat &m, const std::complex<double>& x);
extern template smat apply_function(short (*f)(short, short), const smat &m, const short& x);
extern template imat apply_function(int (*f)(int, int), const imat &m, const int& x);
extern template bmat apply_function(bin (*f)(bin, bin), const bmat &m, const bin& x);
#endif // HAVE_EXTERN_TEMPLATE
//! \endcond
} // namespace itpp
#endif // #ifndef HELP_FUNCTIONS_H
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