forked from netkiller/netkiller.github.io
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathmahout.html
More file actions
187 lines (159 loc) · 9.91 KB
/
mahout.html
File metadata and controls
187 lines (159 loc) · 9.91 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>31.2. Mahout</title><link rel="stylesheet" type="text/css" href="/docbook.css" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="home" href="index.html" title="Netkiller Java 手札" /><link rel="up" href="sdk.html" title="第 31 章 Software Development Kit" /><link rel="prev" href="sdk.html" title="第 31 章 Software Development Kit" /><link rel="next" href="hessian.html" title="31.3. Hessian" /></head><body><a xmlns="" href="//www.netkiller.cn/">Home</a> |
<a xmlns="" href="//netkiller.github.io/">简体中文</a> |
<a xmlns="" href="http://netkiller.sourceforge.net/">繁体中文</a> |
<a xmlns="" href="/journal/index.html">杂文</a> |
<a xmlns="" href="https://zhuanlan.zhihu.com/netkiller">知乎专栏</a> |
<a xmlns="" href="https://github.com/netkiller">Github</a> |
<a xmlns="" href="http://my.oschina.net/neochen/">OSChina 博客</a> |
<a xmlns="" href="https://cloud.tencent.com/developer/column/2078">云社区</a> |
<a xmlns="" href="https://yq.aliyun.com/u/netkiller/">云栖社区</a> |
<a xmlns="" href="https://www.facebook.com/bg7nyt">Facebook</a> |
<a xmlns="" href="http://cn.linkedin.com/in/netkiller/">Linkedin</a> |
<a xmlns="" href="//www.netkiller.cn/home/video.html">视频教程</a> |
<a xmlns="" href="//www.netkiller.cn/home/donations.html">打赏(Donations)</a> |
<a xmlns="" href="//www.netkiller.cn/home/about.html">About</a><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">31.2. Mahout</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="sdk.html">上一页</a> </td><th width="60%" align="center">第 31 章 Software Development Kit</th><td width="20%" align="right"> <a accesskey="n" href="hessian.html">下一页</a></td></tr></table><hr /></div><table xmlns=""><tr><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=watch&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=fork&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&type=follow&count=true&size=large" height="30" width="240" frameborder="0" scrolling="0" style="width:240px; height: 30px;" allowTransparency="true"></iframe></td><td></td><td><a href="https://zhuanlan.zhihu.com/netkiller"><img src="/images/logo/zhihu-card-default.svg" height="25" /></a></td><td valign="middle"><a href="https://zhuanlan.zhihu.com/netkiller">知乎专栏</a> ｜ <a href="https://www.zhihu.com/club/1241768772601950208">多维度架构</a></td><td> | </td><td>微信号 netkiller-ebook </td><td> | </td><td>QQ群：128659835 请注明“读者”</td></tr></table><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="mahout"></a>31.2. Mahout</h2></div></div></div>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="idp870"></a>31.2.1. 推荐系统</h3></div></div></div>
<div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="idp867"></a>31.2.1.1. Maven pom.xml</h4></div></div></div>
<pre class="screen">
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>cn.netkiller</groupId>
<artifactId>mahout</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>mahout</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.mahout</groupId>
<artifactId>mahout-core</artifactId>
<version>0.9</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-nop</artifactId>
<version>1.7.30</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
</pre>
</div>
<div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="idp868"></a>31.2.1.2. 推荐程序</h4></div></div></div>
<pre class="programlisting">
package cn.netkiller.mahout;
import java.io.File;
import java.util.List;
import org.apache.mahout.cf.taste.impl.model.file.FileDataModel;
import org.apache.mahout.cf.taste.impl.neighborhood.NearestNUserNeighborhood;
import org.apache.mahout.cf.taste.impl.recommender.GenericUserBasedRecommender;
import org.apache.mahout.cf.taste.impl.similarity.PearsonCorrelationSimilarity;
import org.apache.mahout.cf.taste.model.DataModel;
import org.apache.mahout.cf.taste.neighborhood.UserNeighborhood;
import org.apache.mahout.cf.taste.recommender.RecommendedItem;
import org.apache.mahout.cf.taste.recommender.Recommender;
import org.apache.mahout.cf.taste.similarity.UserSimilarity;
public class App {
public App() {
// TODO Auto-generated constructor stub
}
public static void main(String[] args) {
// TODO Auto-generated method stub
try {
// 从文件加载数据
DataModel model = new FileDataModel(new File("target/classes/test.csv"));
// 指定用户相似度计算方法，这里采用皮尔森相关度
UserSimilarity similarity = new PearsonCorrelationSimilarity(model);
// 指定用户邻居数量，这里为2
UserNeighborhood neighborhood = new NearestNUserNeighborhood(2, similarity, model);
// 构建基于用户的推荐系统
Recommender recommender = new GenericUserBasedRecommender(model, neighborhood, similarity);
// 得到指定用户的推荐结果，这里是得到用户1的两个推荐
List<RecommendedItem> recommendations = recommender.recommend(1, 2);
// 打印推荐结果
for (RecommendedItem recommendation : recommendations) {
System.out.println(recommendation);
}
} catch (Exception e) {
System.out.println(e);
}
}
}
</pre>
</div>
<div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="idp869"></a>31.2.1.3. 数据文件</h4></div></div></div>
<pre class="screen">
1,101,5.0
1,102,3.0
1,103,2.5
2,101,2.0
2,102,2.5
2,103,5.0
2,104,2.0
3,101,2.5
3,104,4.0
3,105,4.5
3,107,5.0
4,101,5.0
4,103,3.0
4,104,4.5
4,106,4.0
5,101,4.0
5,102,3.0
5,103,2.0
5,104,4.0
5,105,3.5
5,106,4.0
</pre>
</div>
</div>
</div><div xmlns="" id="disqus_thread"></div><script xmlns="">
var disqus_config = function () {
this.page.url = "http://www.netkiller.cn"; // Replace PAGE_URL with your page's canonical URL variable
this.page.identifier = 'netkiller'; // Replace PAGE_IDENTIFIER with your page's unique identifier variable
};
(function() { // DON'T EDIT BELOW THIS LINE
var d = document, s = d.createElement('script');
s.src = '//netkiller.disqus.com/embed.js';
s.setAttribute('data-timestamp', +new Date());
(d.head || d.body).appendChild(s);
})();
</script><noscript xmlns="">Please enable JavaScript to view the <a href="https://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript><br xmlns="" /><script xmlns="" type="text/javascript" id="clustrmaps" src="//cdn.clustrmaps.com/map_v2.js?u=r5HG&d=9mi5r_kkDC8uxG8HuY3p4-2qgeeVypAK9vMD-2P6BYM"></script><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="sdk.html">上一页</a> </td><td width="20%" align="center"><a accesskey="u" href="sdk.html">上一级</a></td><td width="40%" align="right"> <a accesskey="n" href="hessian.html">下一页</a></td></tr><tr><td width="40%" align="left" valign="top">第 31 章 Software Development Kit </td><td width="20%" align="center"><a accesskey="h" href="index.html">起始页</a></td><td width="40%" align="right" valign="top"> 31.3. Hessian</td></tr></table></div><script xmlns="">
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','//www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-11694057-1', 'auto');
ga('send', 'pageview');
</script><script xmlns="" async="async">
var _hmt = _hmt || [];
(function() {
var hm = document.createElement("script");
hm.src = "https://hm.baidu.com/hm.js?93967759a51cda79e49bf4e34d0b0f2c";
var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(hm, s);
})();
</script><script xmlns="" async="async">
(function(){
var bp = document.createElement('script');
var curProtocol = window.location.protocol.split(':')[0];
if (curProtocol === 'https') {
bp.src = 'https://zz.bdstatic.com/linksubmit/push.js';
}
else {
bp.src = 'http://push.zhanzhang.baidu.com/push.js';
}
var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(bp, s);
})();
</script></body></html>