extravec.h

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/*

Copyright (c) 2003, Cornell University
All rights reserved.

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modification, are permitted provided that the following conditions are met:

   - Redistributions of source code must retain the above copyright notice,
       this list of conditions and the following disclaimer.
   - Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in the
       documentation and/or other materials provided with the distribution.
   - Neither the name of Cornell University nor the names of its
       contributors may be used to endorse or promote products derived from
       this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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*/

#ifndef EXTRAVEC_H
#define EXTRAVEC_H

#include "vec.h"
#include "math.h"
#include "general.h"

using namespace TNT;

namespace CLUS
{
template < class T>
inline Vector<T>& GenerateRandomVector2(Vector<T>& vec)
{
    for(Subscript i=0; i< vec.dim(); i++)
        vec[i]=RANDOM01FLOAT;
    return vec;
}

template < class T >
inline void Min(Vector<T>& vec, Subscript N, T* data)
{
    for(Subscript i=0;i<N;i++)
        if (vec[i]>data[i])
            vec[i]=data[i];
}

template < class T >
inline void Max(Vector<T>& vec, Subscript N, T data[])
{
    for(Subscript i=0;i<N;i++)
        if (vec[i]<data[i])
            vec[i]=data[i];
}

template < class T >
inline void Sum(Vector<T>& vec, Subscript N, T data[])
{
    for(Subscript i=0;i<N;i++)
        vec[i]+=data[i];
}

template < class T >
inline void Dif(Vector<T>& vec, Subscript N, Vector<T>& data)
{
    for(Subscript i=0;i<N;i++)
        vec[i]-=data[i];
}


template < class T >
inline void SumPow2(Vector<T>& vec, Subscript N, T data[])
{
    for(Subscript i=0;i<N;i++)
        vec[i]+=pow2(data[i]);
}

template < class T >
inline Vector<T>& operator*=(Vector<T>& vec, double mult)
{
    for(Subscript i=0; i<vec.dim(); i++)
        vec[i]*=mult;
    return vec;
}

template < class T >
inline Vector<T>& SetNormTo(Vector<T>& vec, double norm)
{
    double oldNorm=0.0;
    for(Subscript i=0; i<vec.dim(); i++)
        oldNorm+=pow2(vec[i]);

    double adjust=sqrt(norm/oldNorm);

    for(Subscript i=0; i<vec.dim(); i++)
        vec[i]*=adjust;

    return vec;
}

}

#endif // EXTRAVEC_H

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