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ops_vectors.h

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/* +---------------------------------------------------------------------------+
   |          The Mobile Robot Programming Toolkit (MRPT) C++ library          |
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   |                   http://mrpt.sourceforge.net/                            |
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   |   Copyright (C) 2005-2010  University of Malaga                           |
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   |    This software was written by the Machine Perception and Intelligent    |
   |      Robotics Lab, University of Malaga (Spain).                          |
   |    Contact: Jose-Luis Blanco  <jlblanco@ctima.uma.es>                     |
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   |  This file is part of the MRPT project.                                   |
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   +---------------------------------------------------------------------------+ */
#ifndef  mrpt_math_vector_ops_H
#define  mrpt_math_vector_ops_H

#include <mrpt/utils/utils_defs.h>
#include <mrpt/math/CMatrixTemplateNumeric.h>
#include <mrpt/math/CVectorTemplate.h>

// Many of the functions originally in this file are now in ops_containers.h
#include <mrpt/math/ops_containers.h>


namespace mrpt
{
        namespace utils { class CFileStream; }

        namespace math
        {

                /** \name Generic vector element-wise operations
                  * @{
                  */

                /** a*=b (element-wise multiplication) */
                template <class VECTOR1,class VECTOR2>
                inline RET_CONT1_ASSERT_MRPTVECTORS(VECTOR1,VECTOR2)
                operator *=(VECTOR1&a, const VECTOR2 &b)
                {
                        ASSERT_(a.size()==b.size());
                        typename VECTOR1::iterator ita = a.begin();
                        typename VECTOR2::const_iterator itb = b.begin();
                        const typename VECTOR1::iterator last=a.end();
                        while (ita!=last) { *(ita++)*=*(itb++); }
                        return a;
                }

                /** return a*b  (element-wise multiplication for vectors) */
                template <class VECTOR1,class VECTOR2>
                inline RET_CONT1_ASSERT_MRPTVECTORS(VECTOR1,VECTOR2)
                operator *(const VECTOR1 &a, const VECTOR2 &b)
                {
                        VECTOR1 ret = a;
                        ret*=b;
                        return ret;
                }

                /** a/=b (element-wise division) */
                template <class VECTOR1,class VECTOR2>
                inline RET_CONT1_ASSERT_MRPTVECTORS(VECTOR1,VECTOR2)
                operator /=(VECTOR1&a, const VECTOR2 &b)
                {
                        ASSERT_(a.size()==b.size());
                        typename VECTOR1::iterator ita = a.begin();
                        typename VECTOR2::const_iterator itb = b.begin();
                        const typename VECTOR1::iterator last=a.end();
                        while (ita!=last) { *(ita++)/=*(itb++); }
                        return a;
                }

                /** return a/b  (element-wise division for vectors) */
                template <class VECTOR1,class VECTOR2>
                inline RET_CONT1_ASSERT_MRPTVECTORS(VECTOR1,VECTOR2)
                operator /(const VECTOR1 &a, const VECTOR2 &b)
                {
                        VECTOR1 ret = a;
                        ret/=b;
                        return ret;
                }



                /** @} */

                /** A template function for printing out the contents of a std::vector variable.
                        */
                template <class T>
                std::ostream& operator << (std::ostream& out, const std::vector<T> &d)
                {
                        out << "[" << std::fixed << std::setprecision(4);
                        copy(d.begin(),d.end(), std::ostream_iterator<T>(out," "));
                        out << "]";
                        return out;
                }

                /** A template function for printing out the contents of a std::vector variable.
                        */
                template <class T>
                std::ostream& operator << (std::ostream& out, std::vector<T> *d)
                {
                        out << "[";
                        copy(d->begin(),d->end(), std::ostream_iterator<T>(out," "));
                        out << "]";
                        return out;
                }


        } // End of math namespace

} // End of mrpt namespace


#endif

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