MyMediaLite  3.10
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SparseMatrix< T > Class Template Reference

Class for storing sparse matrices More...

Inheritance diagram for SparseMatrix< T >:
IMatrix< T > AsymmetricCorrelationMatrix SymmetricSparseMatrix< T > SymmetricSparseMatrix-g< float > BinaryDataAsymmetricCorrelationMatrix SymmetricCorrelationMatrix SkewSymmetricSparseMatrix BidirectionalConditionalProbability ConditionalProbability BinaryDataSymmetricCorrelationMatrix Pearson BinaryCosine Cooccurrence Jaccard

Public Member Functions

virtual IMatrix< T > CreateMatrix (int num_rows, int num_columns)
 Create a matrix with a given number of rows and columns
void Resize (int num_rows, int num_cols)
 Grows or shrinks the matrix to the requested size, if necessary
 SparseMatrix (int num_rows, int num_cols)
 Create a sparse matrix with a given number of rows
virtual IMatrix< T > Transpose ()
 Get the transpose of the matrix, i.e. a matrix where rows and columns are interchanged

Properties

virtual bool IsSymmetric [get]
virtual IList< Tuple< int, int > > NonEmptyEntryIDs [get]
 The row and column IDs of non-empty entries in the matrix
int NumberOfColumns [get, set]
virtual int NumberOfNonEmptyEntries [get]
 The number of non-empty entries in the matrix
int NumberOfRows [get]
virtual T this[int x, int y] [get, set]
 Access the elements of the sparse matrix
Dictionary< int, T > this[int x] [get]
 Get a row of the matrix

Detailed Description

Class for storing sparse matrices

The data is stored in row-major mode. Indexes are zero-based. Access is internally done by binary search.

Template Parameters
Tthe matrix element type, must have a default constructor/value
Type Constraints
T :new() 

Member Function Documentation

virtual IMatrix<T> CreateMatrix ( int  num_rows,
int  num_columns 
)
inlinevirtual

Create a matrix with a given number of rows and columns

Parameters
num_rowsthe number of rows
num_columnsthe number of columns
Returns
A matrix with num_rows rows and num_column columns

Implements IMatrix< T >.

Reimplemented in SkewSymmetricSparseMatrix, SymmetricSparseMatrix< T >, SymmetricSparseMatrix-g< float >, and SymmetricSparseMatrix-g< int >.

void Resize ( int  num_rows,
int  num_cols 
)
inline

Grows or shrinks the matrix to the requested size, if necessary

The new entries are filled with zeros. Obsolete entries are removed.

Parameters
num_rowsthe number of rows
num_colsthe number of columns

Implements IMatrix< T >.

SparseMatrix ( int  num_rows,
int  num_cols 
)
inline

Create a sparse matrix with a given number of rows

Parameters
num_rowsthe number of rows
num_colsthe number of columns
virtual IMatrix<T> Transpose ( )
inlinevirtual

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

Returns
the transpose of the matrix (copy)

Implements IMatrix< T >.

Property Documentation

virtual IList<Tuple<int, int> > NonEmptyEntryIDs
get

The row and column IDs of non-empty entries in the matrix

The row and column IDs of non-empty entries in the matrix

virtual int NumberOfNonEmptyEntries
get

The number of non-empty entries in the matrix

The number of non-empty entries in the matrix

virtual T this[int x, int y]
getset

Access the elements of the sparse matrix

Parameters
xthe row ID
ythe column ID
Dictionary<int, T> this[int x]
get

Get a row of the matrix

Parameters
xthe row ID

The documentation for this class was generated from the following file: