VectorBlock< VectorType, Size > Class Template Reference
[Core module]

Expression of a fixed-size or dynamic-size sub-vector. More...

#include <VectorBlock.h>

Inherits Block< VectorType, internal::traits< VectorType >::Flags &RowMajorBit?1:Size, internal::traits< VectorType >::Flags &RowMajorBit?Size:1 >.

Detailed Description

template<typename VectorType, int Size>
class Eigen::VectorBlock< VectorType, Size >

Expression of a fixed-size or dynamic-size sub-vector.

Parameters:

VectorType	the type of the object in which we are taking a sub-vector
Size	size of the sub-vector we are taking at compile time (optional)

This class represents an expression of either a fixed-size or dynamic-size sub-vector. It is the return type of DenseBase::segment(Index,Index) and DenseBase::segment<int>(Index) and most of the time this is the only way it is used.

However, if you want to directly maniputate sub-vector expressions, for instance if you want to write a function returning such an expression, you will need to use this class.

Here is an example illustrating the dynamic case:

Output:

Note:

Even though this expression has dynamic size, in the case where VectorType has fixed size, this expression inherits a fixed maximal size which means that evaluating it does not cause a dynamic memory allocation.

Here is an example illustrating the fixed-size case:

Output:

See also:

class Block, DenseBase::segment(Index,Index,Index,Index), DenseBase::segment(Index,Index)

Definition at line 57 of file VectorBlock.h.

Constructor & Destructor Documentation

Member Function Documentation