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

Class ColumnVector

java.lang.Object

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

org.hortonmachine.gears.utils.math.matrixes.ColumnVector

public class ColumnVector
extends Matrix

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

Field Summary

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

nCols, nRows, values

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
ColumnVector	add(ColumnVector cv)	Add another column vector to this column 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 column vector from an array of values.
void	set(int i, double value)	Set the value of the i'th element.
int	size()	Return this column vector's size.
ColumnVector	subtract(ColumnVector cv)	Subtract another column vector from this column 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

ColumnVector

public ColumnVector(int n)

Constructor.

Parameters:

n - the number of elements

ColumnVector

public ColumnVector(double[] values)

Constructor.

Parameters:

values - the array of values

Method Detail

size

public int size()

Return this column vector's size.

at

public double at(int i)

Return the i'th value of the vector.

Parameters:

i - the index

Returns:

the value

copyValues1D

public double[] copyValues1D()

Copy the values of this matrix.

Returns:

the copied values

set

protected void set(double[] values)

Set this column vector from an array of values.

Parameters:

values - the array of values

set

public void set(int i,
                double value)

Set the value of the i'th element.

Parameters:

i - the index

value - the value

add

public ColumnVector add(ColumnVector cv)
                 throws MatrixException

Add another column vector to this column vector.

Parameters:

cv - the other column vector

Returns:

the sum column vector

Throws:

numbercruncher.MatrixException - for invalid size

MatrixException

subtract

public ColumnVector subtract(ColumnVector cv)
                      throws MatrixException

Subtract another column vector from this column vector.

Parameters:

cv - the other column vector

Returns:

the sum column 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.