Package org.djunits.value.vdouble.matrix

Class DOUBLEMATRIX

java.lang.Object

org.djunits.value.vdouble.matrix.DOUBLEMATRIX

public final class DOUBLEMATRIX
extends Object

DOUBLEMATRIX for creating different test matrices. Matrix values from a double array are stored as m[row][column].

Copyright (c) 2019-2020 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved.
BSD-style license. See DJUNITS License.

Author:

Alexander Verbraeck

Method Summary

Modifier and Type	Method	Description
static double[][]	denseRectArrays(int rows, int cols)	Return a rectangular array with all values != 0.
static <U extends Unit<U>,S extends DoubleScalarInterface<U,S>> S[][]	denseRectScalarArrays(int rows, int cols, Class<S> scalarClass)	Return a rectangular array with all values != 0.
static <U extends Unit<U>,S extends DoubleScalarInterface<U,S>> Collection<DoubleSparseValue<U,S>>	denseRectTuples(int rows, int cols, Class<S> scalarClass)	Return a rectangular array with all values != 0.
static double[][]	sparseRectArrays(int rows, int cols)	Return a rectangular array with only nonzero values on the diagonal.
static <U extends Unit<U>,S extends DoubleScalarInterface<U,S>> S[][]	sparseRectScalarArrays(int rows, int cols, Class<S> scalarClass)	Return a rectangular array with only nonzero values on the diagonal.
static <U extends Unit<U>,S extends DoubleScalarInterface<U,S>> Collection<DoubleSparseValue<U,S>>	sparseRectTuples(int rows, int cols, Class<S> scalarClass)	Return a rectangular array with only nonzero values on the diagonal.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

denseRectArrays

public static double[][] denseRectArrays(int rows,
                                         int cols)

Return a rectangular array with all values != 0.

Parameters:

rows - the number of rows

cols - the number of columns

Returns:

an array with all nonzero values

sparseRectArrays

public static double[][] sparseRectArrays(int rows,
                                          int cols)

Return a rectangular array with only nonzero values on the diagonal.

Parameters:

rows - the number of rows

cols - the number of columns

Returns:

an array with only nonzero values on the diagonal

denseRectScalarArrays

public static <U extends Unit<U>,S extends DoubleScalarInterface<U,S>> S[][] denseRectScalarArrays(int rows,
                                                                                                               int cols,
                                                                                                               Class<S> scalarClass)

Return a rectangular array with all values != 0.

Type Parameters:

U - the unit type

S - the scalar type

Parameters:

rows - the number of rows

cols - the number of columns

scalarClass - the class of scalars to use

Returns:

an array with all nonzero values

sparseRectScalarArrays

public static <U extends Unit<U>,S extends DoubleScalarInterface<U,S>> S[][] sparseRectScalarArrays(int rows,
                                                                                                                int cols,
                                                                                                                Class<S> scalarClass)

Return a rectangular array with only nonzero values on the diagonal.

Type Parameters:

U - the unit type

S - the scalar type

Parameters:

rows - the number of rows

cols - the number of columns

scalarClass - the class of scalars to use

Returns:

an array with only nonzero values on the diagonal

denseRectTuples

public static <U extends Unit<U>,S extends DoubleScalarInterface<U,S>> Collection<DoubleSparseValue<U,S>> denseRectTuples(int rows,
                                                                                                                                            int cols,
                                                                                                                                            Class<S> scalarClass)

Return a rectangular array with all values != 0.

Type Parameters:

U - the unit type

S - the scalar type

Parameters:

rows - the number of rows

cols - the number of columns

scalarClass - the class of scalars to use

Returns:

an array with all nonzero values

sparseRectTuples

public static <U extends Unit<U>,S extends DoubleScalarInterface<U,S>> Collection<DoubleSparseValue<U,S>> sparseRectTuples(int rows,
                                                                                                                                             int cols,
                                                                                                                                             Class<S> scalarClass)

Return a rectangular array with only nonzero values on the diagonal.

Type Parameters:

U - the unit type

S - the scalar type

Parameters:

rows - the number of rows

cols - the number of columns

scalarClass - the class of scalars to use

Returns:

an array with only nonzero values on the diagonal