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Class JSci.maths.DoubleMatrix

java.lang.Object
   |
   +----JSci.maths.Matrix
           |
           +----JSci.maths.DoubleMatrix

public class DoubleMatrix

extends Matrix

ARRAY_2D

Storage format identifier.

matrix

Array containing the elements of the matrix.

storageFormat

DoubleMatrix()

Constructs a matrix.

DoubleMatrix(double[][])

Constructs a matrix by wrapping an array.

DoubleMatrix(DoubleVector[])

Constructs a matrix from an array of vectors (columns).

DoubleMatrix(int, int)

Constructs an empty matrix.

add(AbelianGroupMember)

Returns the addition of this matrix and another.

add(DoubleMatrix)

Returns the addition of this matrix and another.

columns()

Returns the number of columns.

equals(Object)

Compares two double matrices for equality.

finalize()

Finalize.

frobeniusNorm()

Returns the Frobenius norm.

getElement(int, int)

Returns an element of the matrix.

hashCode()

Returns a hashcode for this matrix.

infNorm()

Returns the l(infinity)-norm.

mapElements(Mapping)

Applies a function on all the matrix elements.

multiply(DoubleMatrix)

Returns the multiplication of this matrix and another.

multiply(DoubleVector)

Returns the multiplication of a vector by this matrix.

multiply(RingMember)

Returns the multiplication of this matrix and another.

negate()

Returns the negative of this matrix.

rows()

Returns the number of rows.

scalarMultiply(double)

Returns the multiplication of this matrix by a scalar.

scalarMultiply(RingMember)

Returns the multiplication of this matrix by a scalar.

setElement(int, int, double)

Sets the value of an element of the matrix.

subtract(AbelianGroupMember)

Returns the subtraction of this matrix by another.

subtract(DoubleMatrix)

Returns the subtraction of this matrix by another.

toComplexMatrix()

Converts this matrix to a complex matrix.

toIntegerMatrix()

Converts this matrix to an integer matrix.

toString()

Returns a string representing this matrix.

transpose()

Returns the transpose of this matrix.

 protected static final int ARRAY_2D

Storage format identifier.

 protected static final int storageFormat

 protected double matrix[][]

Array containing the elements of the matrix.

 protected DoubleMatrix()

Constructs a matrix.

 public DoubleMatrix(int row,
                     int col)

Constructs an empty matrix.

Parameters:

row - the number of rows

col - the number of columns

 public DoubleMatrix(double array[][])

Constructs a matrix by wrapping an array.

Parameters:

array - an assigned value

 public DoubleMatrix(DoubleVector array[])

Constructs a matrix from an array of vectors (columns).

Parameters:

array - an assigned value

 protected void finalize() throws Throwable

Finalize.

Throws: Throwable

Any that occur.

Overrides:

finalize in class Object

 public boolean equals(Object m)

Compares two double matrices for equality.

Parameters:

m - a double matrix

Overrides:

equals in class Object

 public String toString()

Returns a string representing this matrix.

Overrides:

toString in class Object

 public int hashCode()

Returns a hashcode for this matrix.

Overrides:

hashCode in class Object

 public IntegerMatrix toIntegerMatrix()

Converts this matrix to an integer matrix.

Returns:

an integer matrix

 public ComplexMatrix toComplexMatrix()

Converts this matrix to a complex matrix.

Returns:

a complex matrix

 public double getElement(int i,
                          int j)

Returns an element of the matrix.

Parameters:

i - row index of the element

j - column index of the element

Throws: MatrixDimensionException

If attempting to access an invalid element.

 public void setElement(int i,
                        int j,
                        double x)

Sets the value of an element of the matrix.

Parameters:

i - row index of the element

j - column index of the element

x - a number

Throws: MatrixDimensionException

If attempting to access an invalid element.

 public double infNorm()

Returns the l(infinity)-norm.

 public double frobeniusNorm()

Returns the Frobenius norm.

 public int rows()

Returns the number of rows.

Overrides:

rows in class Matrix

 public int columns()

Returns the number of columns.

Overrides:

columns in class Matrix

 public AbelianGroupMember negate()

Returns the negative of this matrix.

Overrides:

negate in class Matrix

 public AbelianGroupMember add(AbelianGroupMember m)

Returns the addition of this matrix and another.

Overrides:

add in class Matrix

 public DoubleMatrix add(DoubleMatrix m)

Returns the addition of this matrix and another.

Parameters:

m - a double matrix

Throws: MatrixDimensionException

If the matrices are different sizes.

 public AbelianGroupMember subtract(AbelianGroupMember m)

Returns the subtraction of this matrix by another.

Overrides:

subtract in class Matrix

 public DoubleMatrix subtract(DoubleMatrix m)

Returns the subtraction of this matrix by another.

Parameters:

m - a double matrix

Throws: MatrixDimensionException

If the matrices are different sizes.

 public AlgebraMember scalarMultiply(RingMember x)

Returns the multiplication of this matrix by a scalar.

Overrides:

scalarMultiply in class Matrix

 public DoubleMatrix scalarMultiply(double x)

Returns the multiplication of this matrix by a scalar.

Parameters:

x - a double

Returns:

a double matrix

 public DoubleVector multiply(DoubleVector v)

Returns the multiplication of a vector by this matrix.

Parameters:

v - a double vector

Throws: DimensionException

If the matrix and vector are incompatible.

 public RingMember multiply(RingMember m)

Returns the multiplication of this matrix and another.

Overrides:

multiply in class Matrix

 public DoubleMatrix multiply(DoubleMatrix m)

Returns the multiplication of this matrix and another.

Parameters:

m - a double matrix

Returns:

a DoubleMatrix or a DoubleSquareMatrix as appropriate

Throws: MatrixDimensionException

If the matrices are incompatible.

 public Matrix transpose()

Returns the transpose of this matrix.

Returns:

a double matrix

Overrides:

transpose in class Matrix

 public DoubleMatrix mapElements(Mapping f)

Applies a function on all the matrix elements.

Parameters:

f - a user-defined function

Returns:

a double matrix

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