RWToEnd Class Reference

Represents an index that can be used for subscripting vectors, matrices, and arrays from a given element to the end. More...

#include <rw/rwslice.h>

Inheritance diagram for RWToEnd:

Public Member Functions
	RWToEnd (int begin)
	RWToEnd (int begin, int stride)
Public Member Functions inherited from RWSlice
	RWSlice (const char *s)
	RWSlice (int begin, int length)
	RWSlice (int begin, int length, int stride)

Additional Inherited Members
Related Symbols inherited from RWSlice
const RWSlice &	RWAll

Detailed Description

An RWToEnd object is an index which can be used for subscripting vectors, matrices, and arrays from a given element to the end. By subscripting with RWToEnd objects, you create views of selected elements. These new views are vectors, matrices, or arrays in their own right, rather than simply helper classes. This means that a view created with subscripting can be used as an rvalue, an lvalue, or kept as an object for use later.

The class RWToEnd is derived from RWSlice. It can be used to initialize an RWSlice object as follows:

RWSlice s = RWToEnd(3);

Synopsis

#include <rw/math/mathvec.h>
RWMathVec<double> x(20);
cout << x(RWToEnd(4));  // output elements 4 to last

Example

#include <rw/math/genmat.h>
#include <iostream.h>
 
int main() {
  RWGenMat<int> A(6, 6);
  A = 0;
  RWToEnd I(3);  // indices 3,4,5
  A(I, I) = 1;
  cout << A << endl;
}

Program output:

6x6
[
     0     0     0     0     0     0
     0     0     0     0     0     0
     0     0     0     0     0     0
     0     0     0     1     1     1
     0     0     0     1     1     1
     0     0     0     1     1     1
]

See also

RWRange, RWSlice, RWMathVec::operator()(), RWGenMat::operator()(), RWMathArray::operator()()

Constructor & Destructor Documentation

RWToEnd() [1/2]

RWToEnd::RWToEnd ( int begin )

inline

Constructs an object which indexes starting at element begin and ending with the last element.

RWToEnd() [2/2]

RWToEnd::RWToEnd ( int begin, int stride )

inline

Constructs an object which indexes starting at element begin and ending with the last element. The parameter stride is the increment between successive selected elements.