Package org.la4j.matrix.dense
Class Basic2DMatrix
- java.lang.Object
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- org.la4j.Matrix
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- org.la4j.matrix.DenseMatrix
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- org.la4j.matrix.dense.Basic2DMatrix
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- All Implemented Interfaces:
java.lang.Iterable<java.lang.Double>
public class Basic2DMatrix extends DenseMatrix
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Field Summary
Fields Modifier and Type Field Description private static byte
MATRIX_TAG
private double[][]
self
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Constructor Summary
Constructors Constructor Description Basic2DMatrix()
Basic2DMatrix(double[][] array)
Basic2DMatrix(int rows, int columns)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description Matrix
blankOfShape(int rows, int columns)
Creates the blank matrix (a zero matrix with same size) of this matrix of the given shape:rows
xcolumns
.static Basic2DMatrix
block(Matrix a, Matrix b, Matrix c, Matrix d)
static Basic2DMatrix
constant(int rows, int columns, double constant)
Creates a constantBasic2DMatrix
of the given shape andvalue
.Matrix
copyOfShape(int rows, int columns)
Copies this matrix into the new matrix with specified dimensions:rows
andcolumns
.static Basic2DMatrix
diagonal(int size, double diagonal)
static Basic2DMatrix
from1DArray(int rows, int columns, double[] array)
Creates aBasic2DMatrix
of the given 1Darray
with copying the underlying array.static Basic2DMatrix
from2DArray(double[][] array)
Creates aBasic2DMatrix
of the given 2Darray
w/o copying the underlying array.static Basic2DMatrix
fromBinary(byte[] array)
DecodesBasic2DMatrix
from the given bytearray
.static Basic2DMatrix
fromCSV(java.lang.String csv)
ParsesBasic2DMatrix
from the given CSV string.static Basic2DMatrix
fromMatrixMarket(java.lang.String mm)
ParsesBasic2DMatrix
from the given Matrix Market string.double
get(int i, int j)
Gets the specified element of this matrix.Vector
getRow(int i)
Copies the specified row of this matrix into the vector.static Basic2DMatrix
identity(int size)
Creates an identityBasic2DMatrix
of the givensize
.static Basic2DMatrix
random(int rows, int columns, java.util.Random random)
static Basic2DMatrix
randomSymmetric(int size, java.util.Random random)
Creates a random symmetricBasic2DMatrix
of the givensize
.void
set(int i, int j, double value)
Sets the specified element of this matrix to givenvalue
.void
setAll(double value)
Sets all elements of this matrix to the givenvalue
.void
swapColumns(int i, int j)
Swaps the specified columns of this matrix.void
swapRows(int i, int j)
Swaps the specified rows of this matrix.<T extends Matrix>
Tto(MatrixFactory<T> factory)
Converts this matrix using the givenfactory
.double[][]
toArray()
Converts this dense matrix to double array.byte[]
toBinary()
Encodes this matrix into a byte array.static Basic2DMatrix
unit(int rows, int columns)
static Basic2DMatrix
zero(int rows, int columns)
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Methods inherited from class org.la4j.matrix.DenseMatrix
apply, apply, apply, getColumn, toMatrixMarket
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Methods inherited from class org.la4j.Matrix
add, add, blank, blankOfColumns, blankOfRows, columnMajorIterator, columns, copy, copyOfColumns, copyOfRows, determinant, diagonalProduct, divide, each, eachInColumn, eachInRow, ensureDimensionsAreCorrect, ensureIndexesAreInBounds, equals, equals, euclideanNorm, fail, fold, foldColumn, foldColumns, foldRow, foldRows, hadamardProduct, hashCode, infinityNorm, insert, insert, insert, insert, insertColumn, insertRow, is, is, iterator, iteratorOfColumn, iteratorOfRow, kroneckerProduct, manhattanNorm, max, maxInColumn, maxInRow, min, minInColumn, minInRow, mkString, mkString, mkString, multiply, multiply, multiply, multiplyByItsTranspose, non, non, norm, power, product, rank, removeColumn, removeFirstColumn, removeFirstRow, removeLastColumn, removeLastRow, removeRow, rotate, rowMajorIterator, rows, select, setColumn, setColumn, setRow, setRow, shuffle, slice, sliceBottomRight, sliceTopLeft, subtract, subtract, sum, toColumnMajorSparseMatrix, toColumnVector, toCSV, toCSV, toDenseMatrix, toMatrixMarket, toRowMajorSparseMatrix, toRowVector, toSparseMatrix, toString, trace, transform, transformColumn, transformRow, transpose, update, updateAt, updateColumn, updateRow, withDecompositor, withInverter, withSolver
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Field Detail
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MATRIX_TAG
private static final byte MATRIX_TAG
- See Also:
- Constant Field Values
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self
private double[][] self
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Method Detail
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zero
public static Basic2DMatrix zero(int rows, int columns)
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constant
public static Basic2DMatrix constant(int rows, int columns, double constant)
Creates a constantBasic2DMatrix
of the given shape andvalue
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diagonal
public static Basic2DMatrix diagonal(int size, double diagonal)
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unit
public static Basic2DMatrix unit(int rows, int columns)
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identity
public static Basic2DMatrix identity(int size)
Creates an identityBasic2DMatrix
of the givensize
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random
public static Basic2DMatrix random(int rows, int columns, java.util.Random random)
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randomSymmetric
public static Basic2DMatrix randomSymmetric(int size, java.util.Random random)
Creates a random symmetricBasic2DMatrix
of the givensize
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from1DArray
public static Basic2DMatrix from1DArray(int rows, int columns, double[] array)
Creates aBasic2DMatrix
of the given 1Darray
with copying the underlying array.
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from2DArray
public static Basic2DMatrix from2DArray(double[][] array)
Creates aBasic2DMatrix
of the given 2Darray
w/o copying the underlying array.
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block
public static Basic2DMatrix block(Matrix a, Matrix b, Matrix c, Matrix d)
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fromBinary
public static Basic2DMatrix fromBinary(byte[] array)
DecodesBasic2DMatrix
from the given bytearray
.- Parameters:
array
- the byte array representing a matrix- Returns:
- a decoded matrix
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fromCSV
public static Basic2DMatrix fromCSV(java.lang.String csv)
ParsesBasic2DMatrix
from the given CSV string.- Parameters:
csv
- the CSV string representing a matrix- Returns:
- a parsed matrix
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fromMatrixMarket
public static Basic2DMatrix fromMatrixMarket(java.lang.String mm)
ParsesBasic2DMatrix
from the given Matrix Market string.- Parameters:
mm
- the string in Matrix Market format- Returns:
- a parsed matrix
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get
public double get(int i, int j)
Description copied from class:Matrix
Gets the specified element of this matrix.
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set
public void set(int i, int j, double value)
Description copied from class:Matrix
Sets the specified element of this matrix to givenvalue
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setAll
public void setAll(double value)
Description copied from class:Matrix
Sets all elements of this matrix to the givenvalue
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swapRows
public void swapRows(int i, int j)
Description copied from class:Matrix
Swaps the specified rows of this matrix.
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swapColumns
public void swapColumns(int i, int j)
Description copied from class:Matrix
Swaps the specified columns of this matrix.- Overrides:
swapColumns
in classMatrix
- Parameters:
i
- the column indexj
- the column index
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getRow
public Vector getRow(int i)
Description copied from class:Matrix
Copies the specified row of this matrix into the vector.- Overrides:
getRow
in classDenseMatrix
- Parameters:
i
- the row index- Returns:
- the row represented as vector
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copyOfShape
public Matrix copyOfShape(int rows, int columns)
Description copied from class:Matrix
Copies this matrix into the new matrix with specified dimensions:rows
andcolumns
.- Specified by:
copyOfShape
in classMatrix
- Parameters:
rows
- the number of rows in new matrixcolumns
- the number of columns in new matrix- Returns:
- the copy of this matrix with new size
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toArray
public double[][] toArray()
Description copied from class:DenseMatrix
Converts this dense matrix to double array.- Specified by:
toArray
in classDenseMatrix
- Returns:
- an array representation of this matrix
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to
public <T extends Matrix> T to(MatrixFactory<T> factory)
Description copied from class:Matrix
Converts this matrix using the givenfactory
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blankOfShape
public Matrix blankOfShape(int rows, int columns)
Description copied from class:Matrix
Creates the blank matrix (a zero matrix with same size) of this matrix of the given shape:rows
xcolumns
.- Specified by:
blankOfShape
in classMatrix
- Returns:
- blank matrix
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