de.lmu.ifi.dbs.elki.data
Class FloatVector

java.lang.Object
  de.lmu.ifi.dbs.elki.data.AbstractDatabaseObject
      de.lmu.ifi.dbs.elki.data.AbstractNumberVector<FloatVector,Float>
          de.lmu.ifi.dbs.elki.data.FloatVector

All Implemented Interfaces:

DatabaseObject, FeatureVector<FloatVector,Float>, NumberVector<FloatVector,Float>, SpatialComparable, SpatialObject

public class FloatVector
extends AbstractNumberVector<FloatVector,Float>

A FloatVector is to store real values approximately as float values.

Author:

Elke Achtert

Field Summary

private float[]

values Keeps the values of the float vector

Fields inherited from class de.lmu.ifi.dbs.elki.data.AbstractNumberVector

ATTRIBUTE_SEPARATOR

Constructor Summary

	FloatVector(float[] values) Provides a FloatVector consisting of the given float values.
	FloatVector(Float[] values) Provides a FloatVector consisting of the given float values.
private	FloatVector(float[] values, boolean nocopy) Private constructor.
	FloatVector(List<Float> values) Provides a FloatVector consisting of float values according to the given Float values.
	FloatVector(Matrix columnMatrix) Expects a matrix of one column.

Method Summary

double	doubleValue(int dimension) Returns the value in the specified dimension as double.
Vector	getColumnVector() Returns a Vector representing in one column and getDimensionality() rows the values of this NumberVector of V.
int	getDimensionality() The dimensionality of the vector space where of this FeatureVector of V is an element.
Matrix	getRowVector() Returns a Matrix representing in one row and getDimensionality() columns the values of this NumberVector of V.
Float	getValue(int dimension) Returns the value in the specified dimension.
long	longValue(int dimension) Returns the value in the specified dimension as long.
FloatVector	minus(FloatVector fv) Returns a new NumberVector of V that is the sum of this NumberVector of V and the negativeVector() of given NumberVector of V.
FloatVector	multiplicate(double k) Returns a new NumberVector of V that is the result of a scalar multiplication with the given scalar.
FloatVector	negativeVector() Returns the additive inverse to this NumberVector of V.
FloatVector	newInstance(double[] values) Returns a new NumberVector of N for the given values.
FloatVector	newInstance(Float[] values) Returns a new FeatureVector of V for the given values.
FloatVector	newInstance(List<Float> values) Returns a new FeatureVector of V for the given values.
FloatVector	newInstance(Vector values) Returns a new NumberVector of N for the given values.
FloatVector	nullVector() Provides a null vector of the same Vector Space as this NumberVector of V (that is, of the same dimensionality).
FloatVector	plus(FloatVector fv) Returns a new NumberVector of V that is the sum of this NumberVector of V and the given NumberVector of V.
FloatVector	randomInstance(Float min, Float max, Random random) Returns a NumberVector of V with random values between min and max.
FloatVector	randomInstance(FloatVector min, FloatVector max, Random random) Returns a NumberVector of V with random values between min and max.
FloatVector	randomInstance(Random random) Returns a NumberVector of V with uniformly distributed (0-1) random values.
Float	scalarProduct(FloatVector f) Provides the scalar product (inner product) of this and the given FloatVector.
String	toString() Returns a String representation of the FeatureVector of V as a line that is suitable to be printed in a sequential file.

Methods inherited from class de.lmu.ifi.dbs.elki.data.AbstractNumberVector

byteValue, equals, floatValue, getMax, getMin, intValue, shortValue

Methods inherited from class de.lmu.ifi.dbs.elki.data.AbstractDatabaseObject

getID, setID

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.lmu.ifi.dbs.elki.data.DatabaseObject

getID, setID

Methods inherited from interface de.lmu.ifi.dbs.elki.index.tree.spatial.SpatialObject

getID

Field Detail

values

private float[] values

Keeps the values of the float vector

Constructor Detail

FloatVector

private FloatVector(float[] values,
                    boolean nocopy)

Private constructor. NOT for public use.

FloatVector

public FloatVector(List<Float> values)

Provides a FloatVector consisting of float values according to the given Float values.

Parameters:

values - the values to be set as values of the float vector

FloatVector

public FloatVector(float[] values)

Provides a FloatVector consisting of the given float values.

Parameters:

values - the values to be set as values of the float vector

FloatVector

public FloatVector(Float[] values)

Provides a FloatVector consisting of the given float values.

Parameters:

values - the values to be set as values of the float vector

FloatVector

public FloatVector(Matrix columnMatrix)

Expects a matrix of one column.

Parameters:

columnMatrix - a matrix of one column

Method Detail

newInstance

public FloatVector newInstance(Vector values)

Description copied from interface: NumberVector

Returns a new NumberVector of N for the given values.

Parameters:

values - the values of the NumberVector

Returns:

a new FloatVector with the specified values

newInstance

public FloatVector newInstance(double[] values)

Description copied from interface: NumberVector

Returns a new NumberVector of N for the given values.

Parameters:

values - the values of the NumberVector

Returns:

a new FloatVector with the specified values

newInstance

public FloatVector newInstance(Float[] values)

Description copied from interface: FeatureVector

Returns a new FeatureVector of V for the given values.

Parameters:

values - the values of the featureVector

Returns:

a new FeatureVector of V for the given values

newInstance

public FloatVector newInstance(List<Float> values)

Description copied from interface: FeatureVector

Returns a new FeatureVector of V for the given values.

Parameters:

values - the values of the featureVector

Returns:

a new FeatureVector of V for the given values

randomInstance

public FloatVector randomInstance(Random random)

Description copied from interface: NumberVector

Returns a NumberVector of V with uniformly distributed (0-1) random values.

Parameters:

random - a Random instance

Returns:

a new FloatVector with random values between 0 and 1

randomInstance

public FloatVector randomInstance(Float min,
                                  Float max,
                                  Random random)

Description copied from interface: NumberVector

Returns a NumberVector of V with random values between min and max.

Parameters:

min - minimum of random value

max - maximum of random value

random - a random instance

Returns:

a NumberVector of V with random values between min and max

randomInstance

public FloatVector randomInstance(FloatVector min,
                                  FloatVector max,
                                  Random random)

Description copied from interface: NumberVector

Returns a NumberVector of V with random values between min and max.

Parameters:

min - minimum of random value for each axis

max - maximum of random value for each axis

random - a random instance

Returns:

a NumberVector of V with random values between min and max

See Also:

NumberVector.randomInstance(de.lmu.ifi.dbs.elki.data.NumberVector, de.lmu.ifi.dbs.elki.data.NumberVector, java.util.Random)

getDimensionality

public int getDimensionality()

Description copied from interface: FeatureVector

The dimensionality of the vector space where of this FeatureVector of V is an element.

Returns:

the number of dimensions of this FeatureVector of V

getValue

public Float getValue(int dimension)

Description copied from interface: FeatureVector

Returns the value in the specified dimension.

Parameters:

dimension - the desired dimension, where 1 ≤ dimension ≤ this.getDimensionality()

Returns:

the value in the specified dimension

doubleValue

public double doubleValue(int dimension)

Description copied from interface: NumberVector

Returns the value in the specified dimension as double. Note: this might seem redundant with respect to getValue(dim).doubleValue(), but usually this is much more efficient due to boxing/unboxing cost.

Parameters:

dimension - the desired dimension, where 1 ≤ dimension ≤ this.getDimensionality()

Returns:

the value in the specified dimension

longValue

public long longValue(int dimension)

Description copied from interface: NumberVector

Returns the value in the specified dimension as long. Note: this might seem redundant with respect to getValue(dim).longValue(), but usually this is much more efficient due to boxing/unboxing cost.

Parameters:

dimension - the desired dimension, where 1 ≤ dimension ≤ this.getDimensionality()

Returns:

the value in the specified dimension

getColumnVector

public Vector getColumnVector()

Description copied from interface: NumberVector

Returns a Vector representing in one column and getDimensionality() rows the values of this NumberVector of V.

Returns:

a Matrix representing in one column and getDimensionality() rows the values of this NumberVector of V

getRowVector

public Matrix getRowVector()

Description copied from interface: NumberVector

Returns a Matrix representing in one row and getDimensionality() columns the values of this NumberVector of V.

Returns:

a Matrix representing in one row and getDimensionality() columns the values of this NumberVector of V

plus

public FloatVector plus(FloatVector fv)

Description copied from interface: NumberVector

Returns a new NumberVector of V that is the sum of this NumberVector of V and the given NumberVector of V.

Parameters:

fv - a NumberVector of V to be added to this NumberVector of V

Returns:

a new NumberVector of V that is the sum of this NumberVector of V and the given NumberVector of V

minus

public FloatVector minus(FloatVector fv)

Description copied from interface: NumberVector

Returns a new NumberVector of V that is the sum of this NumberVector of V and the negativeVector() of given NumberVector of V.

Parameters:

fv - a NumberVector of V to be subtracted to this NumberVector of V

Returns:

a new NumberVector of V that is the sum of this NumberVector of V and the negative of given NumberVector of V

scalarProduct

public Float scalarProduct(FloatVector f)

Provides the scalar product (inner product) of this and the given FloatVector.

Parameters:

f - the FloatVector to compute the scalar product for

Returns:

the scalar product (inner product) of this and the given FloatVector

nullVector

public FloatVector nullVector()

Description copied from interface: NumberVector

Provides a null vector of the same Vector Space as this NumberVector of V (that is, of the same dimensionality).

Returns:

a null vector of the same Vector Space as this NumberVector of V (that is, of the same dimensionality)

negativeVector

public FloatVector negativeVector()

Description copied from interface: NumberVector

Returns the additive inverse to this NumberVector of V.

Returns:

the additive inverse to this NumberVector of V

multiplicate

public FloatVector multiplicate(double k)

Description copied from interface: NumberVector

Returns a new NumberVector of V that is the result of a scalar multiplication with the given scalar.

Parameters:

k - a scalar to multiply this NumberVector of V with

Returns:

a new NumberVector of V that is the result of a scalar multiplication with the given scalar

toString

public String toString()

Description copied from interface: FeatureVector

Returns a String representation of the FeatureVector of V as a line that is suitable to be printed in a sequential file.

Specified by:

toString in interface FeatureVector<FloatVector,Float>

Overrides:

toString in class Object

Returns:

a String representation of the FeatureVector of V