Package org.hortonmachine.gears.utils.math.matrixes

Class RowVector

java.lang.Object

org.hortonmachine.gears.utils.math.matrixes.Matrix

org.hortonmachine.gears.utils.math.matrixes.RowVector

public class RowVector
extends Matrix

From: Java Number Cruncher The Java Programmer's Guide to Numerical Computation by Ronald Mak

Field Summary

Fields inherited from class org.hortonmachine.gears.utils.math.matrixes.Matrix

nCols, nRows, values

Constructor Summary

Constructors

Constructor	Description
RowVector(double[] values)	Constructor.
RowVector(int n)	Constructor.

Method Summary

Modifier and Type	Method	Description
RowVector	add(RowVector rv)	Add another row vector to this row vector.
double	at(int i)	Return the i'th value of the vector.
double[]	copyValues1D()	Copy the values of this matrix.
double	norm()	Compute the Euclidean norm.
void	print()	Print the vector values.
protected void	set(double[] values)	Set this row vector from an array of values.
void	set(int i, double value)	Set the i'th value of the vector.
int	size()	Return the row vector's size.
RowVector	subtract(RowVector rv)	Subtract another row vector from this row vector.

Methods inherited from class org.hortonmachine.gears.utils.math.matrixes.Matrix

add, at, columnCount, copyValues2D, getColumn, getRow, multiply, multiply, multiply, multiply, rowCount, set, set, setColumn, setRow, subtract, transpose, values

Methods inherited from class java.lang.Object

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

Constructor Detail

RowVector

public RowVector(int n)

Constructor.

Parameters:

n - the number of elements

RowVector

public RowVector(double[] values)

Constructor.

Parameters:

values - the array of values

Method Detail

size

public int size()

Return the row vector's size.

copyValues1D

public double[] copyValues1D()

Copy the values of this matrix.

Returns:

the copied values

at

public double at(int i)

Return the i'th value of the vector.

Parameters:

i - the index

Returns:

the value

set

protected void set(double[] values)

Set this row vector from an array of values.

Parameters:

values - the array of values

set

public void set(int i,
                double value)

Set the i'th value of the vector.

Parameters:

i - the index

value - the value

add

public RowVector add(RowVector rv)
              throws MatrixException

Add another row vector to this row vector.

Parameters:

rv - the other row vector

Returns:

the sum row vector

Throws:

numbercruncher.MatrixException - for invalid size

MatrixException

subtract

public RowVector subtract(RowVector rv)
                   throws MatrixException

Subtract another row vector from this row vector.

Parameters:

rv - the other row vector

Returns:

the sum row vector

Throws:

numbercruncher.MatrixException - for invalid size

MatrixException

norm

public double norm()

Compute the Euclidean norm.

Returns:

the norm

print

public void print()

Print the vector values.