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31 package org.objectweb.proactive.examples.algebra;
32
33 import java.io.Serializable  ;
34
35 import org.apache.log4j.Logger;
36
37 public class Vector extends Object implements Serializable , Cloneable {
38
39 static Logger logger = Logger.getLogger(Vector.class.getName());
40 int size;
41 double[] elements;
42
43
44 public Vector() {
45 super();
46 }
47
48
49 public Vector(int _size) {
50 super();
51 this.elements = new double[_size];
52 this.size = _size;
53 }
54
55
56 public Vector(double[] tab) {
57 this(tab.length);
58 int index;
59 for (index = 0; index < tab.length; index++) {
60 this.setElement(index, tab[index]);
61 }
62 }
63
64
65 public void randomizeFillIn() {
66 int i;
67
68 for (i = 0; i < this.size; i++) {
69 this.setElement(i, Math.random());
70 }
71 return;
72 }
73
74
75 public int getSize() {
76 return this.size;
77 }
78
79
80 public synchronized void setElement(int index, double x) {
81 this.elements[index] = x;
82 return;
83 }
84
85
86 public synchronized double getElement(int index) {
87 return this.elements[index];
88 }
89
90
91 public synchronized Vector multiplicate(double a) {
92 int index;
93 Vector v;
94
95 v = new Vector(this.size);
96
97 for (index = 0; index < this.size; index++) {
98 v.setElement(index, a * this.getElement(index));
99 }
100
101 return v;
102 }
103
104
105 public double distance(Vector _v) {
106 if (_v.getSize() != this.getSize())
107 return -1;
108
109 int i;
110 double max = 0, current = 0;
111 for (i = 0; i < _v.getSize(); i++) {
112 current = Math.abs(_v.getElement(i) - this.getElement(i));
113 if (current > max)
114 max = current;
115 }
116 return max;
117 }
118
119
120 public Vector concat(Vector _v) {
121 int i;
122 Vector result = new Vector(this.getSize() + _v.getSize());
123
124 for (i = 0; i < this.getSize(); i++) {
125 result.setElement(i, this.getElement(i));
126 }
127 for (i = 0; i < _v.getSize(); i++) {
128 result.setElement(i + this.getSize(), _v.getElement(i));
129 }
130 return result;
131 }
132
133
134 public void display() {
135 int i;
136 logger.info("___");
137 for (i = 0; i < this.size; i++) {
138 logger.info("|" + this.getElement(i) + "|");
139 }
140 logger.info("---");
141 return;
142 }
143
144
145 public synchronized Vector add(Vector a) {
146 int index;
147 Vector v;
148
149 v = new Vector(this.size);
150
151 for (index = 0; index < size; index++) {
152 v.setElement(index, a.getElement(index) + this.getElement(index));
153 }
154
155 return v;
156 }
157 }
158 |
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