Utilility class for sequential_reduction. More...

#include <graph_transform.hpp>

Public Member Functions
size_t	count ()
	Number of elements indexed by this `multivariate_index` More...

void	flip ()
	Flip the mask of active dimensions.

size_t	index (size_t i)
	Get given component of this `multivariate_index`

std::vector< size_t >	index ()
	Get `multivariate_index` as a vector.

std::vector< bool >::reference	mask (size_t i)
	Get / set active dimensions of this `multivariate_index`

	multivariate_index (size_t bound_, size_t dim, bool flag=true)
	CTOR of `multivariate_index` representing `{0,..,B-1}^D` More...

	multivariate_index (std::vector< size_t > bound, bool flag=true)
	CTOR of `multivariate_index` representing the product set `Prod_i {0,..,B[i]-1}` More...

	operator size_t ()
	Get univariate pointer.

multivariate_index &	operator++ ()
	Advance to next element of this sub slice.

void	set_mask (const std::vector< bool > &mask)
	Set all active dimensions of this `multivariate_index`

Detailed Description

Utilility class for sequential_reduction.

Helps looping through a multivariate index along any possible sub slice.

Example: Loop through {0,1}^5 with middle index (2) slowest running and remaining indices (0,1,3,4) fastest running.

 #include <TMBad.hpp> using
namespace TMBad; int main() { multivariate_index x(2, 5, false); x.mask(2) =
true; for (int j=0; j<x.count(); ++j, ++x) { x.flip(); for (int i=0;
i<x.count(); ++i, ++x) { Rcout << x.index() << " pointer=" << x << "\n";
     }
     x.flip();
   }
 }

Definition at line 435 of file graph_transform.hpp.

Constructor & Destructor Documentation

§ multivariate_index() [1/2]

TMBad::multivariate_index::multivariate_index	(	size_t	bound_,
		size_t	dim,
		bool	flag = `true`
	)

CTOR of multivariate_index representing {0,..,B-1}^D

Parameters

bound	B
dim	D
flag	Fill mask of active dimensions with this value

Definition at line 3709 of file TMBad.cpp.

§ multivariate_index() [2/2]

TMBad::multivariate_index::multivariate_index	(	std::vector< size_t >	bound,
		bool	flag = `true`
	)

CTOR of multivariate_index representing the product set Prod_i {0,..,B[i]-1}

Parameters

Bound	vector B containing the number of indices for each dimension
flag	Fill mask of active dimensions with this value

Definition at line 3716 of file TMBad.cpp.

Member Function Documentation

§ count()

size_t TMBad::multivariate_index::count ( )

Number of elements indexed by this multivariate_index

Note: It is generally recommended to avoid re-calculating the count inside a loop such as for(i=0; i<x.count(); i++, ++x).

Definition at line 3702 of file TMBad.cpp.

Referenced by TMBad::clique::get_stride(), and TMBad::sequential_reduction::tabulate().