de.lmu.ifi.dbs.elki.data

Class VectorUtil

java.lang.Object

de.lmu.ifi.dbs.elki.data.VectorUtil

public final class VectorUtil
extends Object

Utility functions for use with vectors. Note: obviously, many functions are class methods or database related.

Constructor Summary

Constructors

Constructor and Description
VectorUtil()

Method Summary

Methods

Modifier and Type	Method and Description
static <V extends NumberVector<?,?>> DoubleMinMax	getRangeDouble(V vec) Return the range across all dimensions.
static <V extends NumberVector<V,?>> V	randomVector(V template) Produce a new vector based on random numbers in [0:1] of the same type and dimensionality as the given vector.
static <V extends NumberVector<V,?>> V	randomVector(V template, Random r) Produce a new vector based on random numbers in [0:1] of the same type and dimensionality as the given vector.

Methods inherited from class java.lang.Object

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

Constructor Detail

VectorUtil

public VectorUtil()

Method Detail

getRangeDouble

public static <V extends NumberVector<?,?>> DoubleMinMax getRangeDouble(V vec)

Return the range across all dimensions. Useful in particular for time series.

Type Parameters:

V - Vector type

Parameters:

vec - Vector to process.

Returns:

[min, max]

randomVector

public static <V extends NumberVector<V,?>> V randomVector(V template,
                                           Random r)

Produce a new vector based on random numbers in [0:1] of the same type and dimensionality as the given vector.

Parameters:

template - existing instance of wanted dimensionality.

r - Random generator

Returns:

new instance

randomVector

public static <V extends NumberVector<V,?>> V randomVector(V template)

Produce a new vector based on random numbers in [0:1] of the same type and dimensionality as the given vector.

Parameters:

template - existing instance of wanted dimensionality.

Returns:

new instance