org.maochen.nlp.util

Class VectorUtils

java.lang.Object

org.maochen.nlp.util.VectorUtils

public class VectorUtils
extends Object

Copyright 2014-2015 maochen.org Author: Maochen.G contact@maochen.org For the detail information about license, check the LICENSE.txt

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program ; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

Created by Maochen on 12/3/14.

Field Summary

Fields

Modifier and Type	Field and Description
static java.util.function.Function<Double,Double>	sigmoid
static java.util.function.Function<Double,Double>	tanh

Constructor Summary

Constructors

Constructor and Description
VectorUtils()

Method Summary

Modifier and Type	Method and Description
static double[]	addition(double[]... vectors)
static double	dotProduct(double[] vec1, double[] vec2)
static float[]	doubleToFloat(double[] vector)
static double[]	floatToDouble(float[] vector)
static double	gaussianPDF(double mean, double variance, double x)
static double	getCosinValue(double[] vector1, double[] vector2)
static String[]	intToString(int[] vectorIndex)
static double[]	scale(double[] a, double scale)
static double[]	zip(double[] vec1, double[] vec2, BiFunctionDoublePrimitive op)

Methods inherited from class java.lang.Object

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

Field Detail

sigmoid

public static java.util.function.Function<Double,Double> sigmoid

tanh

public static java.util.function.Function<Double,Double> tanh

Constructor Detail

VectorUtils

public VectorUtils()

Method Detail

zip

public static double[] zip(double[] vec1,
                           double[] vec2,
                           BiFunctionDoublePrimitive op)

addition

public static double[] addition(double[]... vectors)

dotProduct

public static double dotProduct(double[] vec1,
                                double[] vec2)

getCosinValue

public static double getCosinValue(double[] vector1,
                                   double[] vector2)

scale

public static double[] scale(double[] a,
                             double scale)

gaussianPDF

public static double gaussianPDF(double mean,
                                 double variance,
                                 double x)

doubleToFloat

public static float[] doubleToFloat(double[] vector)

floatToDouble

public static double[] floatToDouble(float[] vector)

intToString

public static String[] intToString(int[] vectorIndex)