org.ejml.data

Interface MatrixSparse

All Superinterfaces:

Matrix, ReshapeMatrix, java.io.Serializable

All Known Subinterfaces:

DMatrixSparse, FMatrixSparse

All Known Implementing Classes:

DMatrixSparseCSC, DMatrixSparseTriplet, FMatrixSparseCSC, FMatrixSparseTriplet

public interface MatrixSparse
extends ReshapeMatrix

High level interface for all sparse matrices

Method Summary

Modifier and Type	Method and Description
int	getNonZeroLength() Returns the number of non-zero elements.
boolean	isAssigned(int row, int col) Is the specified element explicitly assigned a value
void	printNonZero() Prints to standard out the non-zero elements only.
void	remove(int row, int col) If the specified element is non-zero it is removed from the structure
void	reshape(int numRows, int numCols) Changes the number of rows and columns in the matrix.
void	reshape(int numRows, int numCols, int arrayLength) Reshapes the matrix so that it can store a matrix with the specified dimensions and the number of non-zero elements.
void	shrinkArrays() Reduces the size of internal data structures to their minimal size.
void	zero() Sets all elements to zero by removing the sparse graph

Methods inherited from interface org.ejml.data.Matrix

copy, createLike, getNumCols, getNumRows, getType, print, print, set

Method Detail

printNonZero

void printNonZero()

Prints to standard out the non-zero elements only.

reshape

void reshape(int numRows,
             int numCols,
             int arrayLength)

Reshapes the matrix so that it can store a matrix with the specified dimensions and the number of non-zero elements. The reshaped matrix will be empty.

Parameters:

numRows - number of rows

numCols - number of columns

arrayLength - Array length for storing non-zero elements.

reshape

void reshape(int numRows,
             int numCols)

Changes the number of rows and columns in the matrix. The graph structure is flushed and the matrix will be empty/all zeros. Similar to reshape(int, int, int), but the storage for non-zero elements is not changed

Specified by:

reshape in interface ReshapeMatrix

Parameters:

numRows - number of rows

numCols - number of columns

shrinkArrays

void shrinkArrays()

Reduces the size of internal data structures to their minimal size. No information is lost but the arrays will change

remove

void remove(int row,
            int col)

If the specified element is non-zero it is removed from the structure

Parameters:

row - the row

col - the column

isAssigned

boolean isAssigned(int row,
                   int col)

Is the specified element explicitly assigned a value

Parameters:

row - the row

col - the column

Returns:

true if it has been assigned a value or false if not

zero

void zero()

Sets all elements to zero by removing the sparse graph

getNonZeroLength

int getNonZeroLength()

Returns the number of non-zero elements.