us_vector.cpp

Go to the documentation of this file.

#include "us_vector.h"
#include "us_math2.h"

US_Vector::US_Vector( int size, double value ) 
{ 
   v.fill( value, size );
};


void US_Vector::add( const US_Vector& other )
{
   Q_ASSERT( other.size() == v.size() );

   for ( int i = 0; i < v.size(); i++ )
      v[ i ] += other[ i ];
}

void US_Vector::add( double value )
{
   for ( int i = 0; i < v.size(); i++ )
      v[ i ] += value;
}

double US_Vector::dot( const US_Vector& other )
{
   Q_ASSERT( other.size() == v.size() );
   
   double value = 0.0;

   for ( int i = 0; i < v.size(); i++ )
      value += v[ i ] * other[ i ];

   return value;
}

void US_Vector::mult( const US_Vector& other )
{
   Q_ASSERT( other.size() == v.size() );

   for ( int i = 0; i < v.size(); i++ )
      v[ i ] *= other[ i ];
}

void US_Vector::scale( double value )
{
   for ( int i = 0; i < v.size(); i++ )
      v[ i ] *= value;
}

double US_Vector::distance( const US_Vector& other )
{
   Q_ASSERT( other.size() == v.size() );
   double value = 0.0;

   for ( int i = 0; i < v.size(); i++ )
      value += sq( v[ i ] - other[ i ] );

   return sqrt( value );
}

double US_Vector::L2norm( void )
{
   double value = 0.0;

   for ( int i = 0; i < v.size(); i++ )
      value += sq( v[ i ] );

   return sqrt( value );
}