RWMathVecPick< T > Class Template Reference

Allows selected elements to be addressed in a vector, without creating a new view. More...

#include <rw/math/mthvecpk.h>

Public Member Functions
RWMathVec< T >::size_type	length () const
T &	operator() (int i)
T	operator() (int i) const
RWMathVecPick< T > &	operator= (const RWMathVecPick< T > &)

Friends
class	RWMathVec< T >

Detailed Description

template<class T>
class RWMathVecPick< T >

The RWMathVecPick class allows selected elements to be addressed. Unlike subscripting or slicing, picking does not create a new view.

Example

#include <rw/math/mathvec.h>
#include <iostream>
 
int main() {
  // Set up picked elements:
  RWIntVec ipick("[3 4 8]");
 
  RWMathVec<double> dv(10, 0, 2);  // 0 2 4 6 8 10 12 14 16 18
 
  RWMathVecPick<double> dvPick = dv.pick(ipick);
 
  std::cout << dvPick.length() << std::endl;  // 3
  std::cout << dvPick(0) << std::endl;        // 6
  std::cout << dvPick(2) << std::endl;        // 16
 
  return 0;
}

Member Function Documentation

length()

template<class T >

RWMathVec< T >::size_type RWMathVecPick< T >::length ( ) const

inline

Return the number of elements in the pick

operator()() [1/2]

template<class T >

T & RWMathVecPick< T >::operator() ( int i )

inline

Returns a reference to the value in the associated RWMathVec stored at the index indicated by the i ^th element of the RWMathVecPick.

operator()() [2/2]

template<class T >

T RWMathVecPick< T >::operator() ( int i ) const

inline

Returns the value in the associated RWMathVec stored at the index indicated by the i ^th element of the RWMathVecPick.

operator=()

template<class T >

RWMathVecPick< T > & RWMathVecPick< T >::operator=

(

const RWMathVecPick< T > &

)

Assignment operator for RWMathVecPick. The picks must have the same dimensions. The expression:

this = v;

implies thisi = vi