C# Class MyMediaLite.DataType.SparseBooleanMatrix

Sparse representation of a boolean matrix, using HashSets

Fast row-wise access is possible. Indexes are zero-based. If you need a more memory-efficient data structure, try SparseBooleanMatrixBinarySearch or SparseBooleanMatrixStatic.

Inheritance: IBooleanMatrix

显示文件 Open project: zenogantner/MML-KDD Class Usage Examples

Public Methods

Method	Description
CreateMatrix ( int x, int y ) : IMatrix
GetEntriesByColumn ( int column_id ) : IList	Takes O(N) worst-case time, where N is the number of rows, if the internal hash table can be queried in constant time.
GetEntriesByRow ( int row_id ) : IList
NumEntriesByColumn ( int column_id ) : int
NumEntriesByRow ( int row_id ) : int
Overlap ( IBooleanMatrix s ) : int	Get the overlap of two matrices, i.e. the number of true entries where they agree
RemoveColumn ( int y ) : void	Removes a column, and fills the gap by decrementing all occurrences of higher column IDs by one
Transpose ( ) : IMatrix	Get the transpose of the matrix, i.e. a matrix where rows and columns are interchanged
this ( int x ) : ICollection
this ( int x, int y ) : bool	Indexer to access the elements of the matrix

Method Details

CreateMatrix() public method

public CreateMatrix ( int x, int y ) : IMatrix
x	int
y	int
return	IMatrix

GetEntriesByColumn() public method

Takes O(N) worst-case time, where N is the number of rows, if the internal hash table can be queried in constant time.

public GetEntriesByColumn ( int column_id ) : IList
column_id	int
return	IList

GetEntriesByRow() public method

public GetEntriesByRow ( int row_id ) : IList
row_id	int
return	IList

NumEntriesByColumn() public method

public NumEntriesByColumn ( int column_id ) : int
column_id	int
return	int

NumEntriesByRow() public method

public NumEntriesByRow ( int row_id ) : int
row_id	int
return	int

Overlap() public method

Get the overlap of two matrices, i.e. the number of true entries where they agree

public Overlap ( IBooleanMatrix s ) : int
s	IBooleanMatrix	the to compare to
return	int

RemoveColumn() public method

Removes a column, and fills the gap by decrementing all occurrences of higher column IDs by one

public RemoveColumn ( int y ) : void
y	int	the column ID
return	void

Transpose() public method

Get the transpose of the matrix, i.e. a matrix where rows and columns are interchanged

public Transpose ( ) : IMatrix
return	IMatrix

this() public method

public this ( int x ) : ICollection
x	int
return	ICollection

this() public method

Indexer to access the elements of the matrix

public this ( int x, int y ) : bool
x	int	the row ID
y	int	the column ID
return	bool