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README.html
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README.html
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<!DOCTYPE html><html><head><meta charset="utf-8"><style>body {
width: 45em;
border: 1px solid #ddd;
outline: 1300px solid #fff;
margin: 16px auto;
}
body .markdown-body
{
padding: 30px;
}
@font-face {
font-family: octicons-anchor;
src: url(data:font/woff;charset=utf-8;base64,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) format('woff');
}
.markdown-body {
-ms-text-size-adjust: 100%;
-webkit-text-size-adjust: 100%;
color: #333;
overflow: hidden;
font-family: "Helvetica Neue", Helvetica, "Segoe UI", Arial, freesans, sans-serif;
font-size: 16px;
line-height: 1.6;
word-wrap: break-word;
}
.markdown-body a {
background: transparent;
}
.markdown-body a:active,
.markdown-body a:hover {
outline: 0;
}
.markdown-body strong {
font-weight: bold;
}
.markdown-body h1 {
font-size: 2em;
margin: 0.67em 0;
}
.markdown-body img {
border: 0;
}
.markdown-body hr {
-moz-box-sizing: content-box;
box-sizing: content-box;
height: 0;
}
.markdown-body pre {
overflow: auto;
}
.markdown-body code,
.markdown-body kbd,
.markdown-body pre {
font-family: monospace, monospace;
font-size: 1em;
}
.markdown-body input {
color: inherit;
font: inherit;
margin: 0;
}
.markdown-body html input[disabled] {
cursor: default;
}
.markdown-body input {
line-height: normal;
}
.markdown-body input[type="checkbox"] {
-moz-box-sizing: border-box;
box-sizing: border-box;
padding: 0;
}
.markdown-body table {
border-collapse: collapse;
border-spacing: 0;
}
.markdown-body td,
.markdown-body th {
padding: 0;
}
.markdown-body * {
-moz-box-sizing: border-box;
box-sizing: border-box;
}
.markdown-body input {
font: 13px/1.4 Helvetica, arial, freesans, clean, sans-serif, "Segoe UI Emoji", "Segoe UI Symbol";
}
.markdown-body a {
color: #4183c4;
text-decoration: none;
}
.markdown-body a:hover,
.markdown-body a:focus,
.markdown-body a:active {
text-decoration: underline;
}
.markdown-body hr {
height: 0;
margin: 15px 0;
overflow: hidden;
background: transparent;
border: 0;
border-bottom: 1px solid #ddd;
}
.markdown-body hr:before {
display: table;
content: "";
}
.markdown-body hr:after {
display: table;
clear: both;
content: "";
}
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
margin-top: 15px;
margin-bottom: 15px;
line-height: 1.1;
}
.markdown-body h1 {
font-size: 30px;
}
.markdown-body h2 {
font-size: 21px;
}
.markdown-body h3 {
font-size: 16px;
}
.markdown-body h4 {
font-size: 14px;
}
.markdown-body h5 {
font-size: 12px;
}
.markdown-body h6 {
font-size: 11px;
}
.markdown-body blockquote {
margin: 0;
}
.markdown-body ul,
.markdown-body ol {
padding: 0;
margin-top: 0;
margin-bottom: 0;
}
.markdown-body ol ol,
.markdown-body ul ol {
list-style-type: lower-roman;
}
.markdown-body ul ul ol,
.markdown-body ul ol ol,
.markdown-body ol ul ol,
.markdown-body ol ol ol {
list-style-type: lower-alpha;
}
.markdown-body dd {
margin-left: 0;
}
.markdown-body code {
font: 12px Consolas, "Liberation Mono", Menlo, Courier, monospace;
}
.markdown-body pre {
margin-top: 0;
margin-bottom: 0;
font: 12px Consolas, "Liberation Mono", Menlo, Courier, monospace;
}
.markdown-body .octicon {
font: normal normal 16px octicons-anchor;
line-height: 1;
display: inline-block;
text-decoration: none;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}
.markdown-body .octicon-link:before {
content: '\f05c';
}
.markdown-body>*:first-child {
margin-top: 0 !important;
}
.markdown-body>*:last-child {
margin-bottom: 0 !important;
}
.markdown-body .anchor {
position: absolute;
top: 0;
bottom: 0;
left: 0;
display: block;
padding-right: 6px;
padding-left: 30px;
margin-left: -30px;
}
.markdown-body .anchor:focus {
outline: none;
}
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
position: relative;
margin-top: 1em;
margin-bottom: 16px;
font-weight: bold;
line-height: 1.4;
}
.markdown-body h1 .octicon-link,
.markdown-body h2 .octicon-link,
.markdown-body h3 .octicon-link,
.markdown-body h4 .octicon-link,
.markdown-body h5 .octicon-link,
.markdown-body h6 .octicon-link {
display: none;
color: #000;
vertical-align: middle;
}
.markdown-body h1:hover .anchor,
.markdown-body h2:hover .anchor,
.markdown-body h3:hover .anchor,
.markdown-body h4:hover .anchor,
.markdown-body h5:hover .anchor,
.markdown-body h6:hover .anchor {
padding-left: 8px;
margin-left: -30px;
line-height: 1;
text-decoration: none;
}
.markdown-body h1:hover .anchor .octicon-link,
.markdown-body h2:hover .anchor .octicon-link,
.markdown-body h3:hover .anchor .octicon-link,
.markdown-body h4:hover .anchor .octicon-link,
.markdown-body h5:hover .anchor .octicon-link,
.markdown-body h6:hover .anchor .octicon-link {
display: inline-block;
}
.markdown-body h1 {
padding-bottom: 0.3em;
font-size: 2.25em;
line-height: 1.2;
border-bottom: 1px solid #eee;
}
.markdown-body h2 {
padding-bottom: 0.3em;
font-size: 1.75em;
line-height: 1.225;
border-bottom: 1px solid #eee;
}
.markdown-body h3 {
font-size: 1.5em;
line-height: 1.43;
}
.markdown-body h4 {
font-size: 1.25em;
}
.markdown-body h5 {
font-size: 1em;
}
.markdown-body h6 {
font-size: 1em;
color: #777;
}
.markdown-body p,
.markdown-body blockquote,
.markdown-body ul,
.markdown-body ol,
.markdown-body dl,
.markdown-body table,
.markdown-body pre {
margin-top: 0;
margin-bottom: 16px;
}
.markdown-body hr {
height: 4px;
padding: 0;
margin: 16px 0;
background-color: #e7e7e7;
border: 0 none;
}
.markdown-body ul,
.markdown-body ol {
padding-left: 2em;
}
.markdown-body ul ul,
.markdown-body ul ol,
.markdown-body ol ol,
.markdown-body ol ul {
margin-top: 0;
margin-bottom: 0;
}
.markdown-body li>p {
margin-top: 16px;
}
.markdown-body dl {
padding: 0;
}
.markdown-body dl dt {
padding: 0;
margin-top: 16px;
font-size: 1em;
font-style: italic;
font-weight: bold;
}
.markdown-body dl dd {
padding: 0 16px;
margin-bottom: 16px;
}
.markdown-body blockquote {
padding: 0 15px;
color: #777;
border-left: 4px solid #ddd;
}
.markdown-body blockquote>:first-child {
margin-top: 0;
}
.markdown-body blockquote>:last-child {
margin-bottom: 0;
}
.markdown-body table {
display: block;
width: 100%;
overflow: auto;
word-break: normal;
word-break: keep-all;
}
.markdown-body table th {
font-weight: bold;
}
.markdown-body table th,
.markdown-body table td {
padding: 6px 13px;
border: 1px solid #ddd;
}
.markdown-body table tr {
background-color: #fff;
border-top: 1px solid #ccc;
}
.markdown-body table tr:nth-child(2n) {
background-color: #f8f8f8;
}
.markdown-body img {
max-width: 100%;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
.markdown-body code {
padding: 0;
padding-top: 0.2em;
padding-bottom: 0.2em;
margin: 0;
font-size: 85%;
background-color: rgba(0,0,0,0.04);
border-radius: 3px;
}
.markdown-body code:before,
.markdown-body code:after {
letter-spacing: -0.2em;
content: "\00a0";
}
.markdown-body pre>code {
padding: 0;
margin: 0;
font-size: 100%;
word-break: normal;
white-space: pre;
background: transparent;
border: 0;
}
.markdown-body .highlight {
margin-bottom: 16px;
}
.markdown-body .highlight pre,
.markdown-body pre {
padding: 16px;
overflow: auto;
font-size: 85%;
line-height: 1.45;
background-color: #f7f7f7;
border-radius: 3px;
}
.markdown-body .highlight pre {
margin-bottom: 0;
word-break: normal;
}
.markdown-body pre {
word-wrap: normal;
}
.markdown-body pre code {
display: inline;
max-width: initial;
padding: 0;
margin: 0;
overflow: initial;
line-height: inherit;
word-wrap: normal;
background-color: transparent;
border: 0;
}
.markdown-body pre code:before,
.markdown-body pre code:after {
content: normal;
}
.markdown-body .highlight {
background: #fff;
}
.markdown-body .highlight .h {
color: #333;
font-style: normal;
font-weight: normal;
}
.markdown-body .highlight .mf,
.markdown-body .highlight .mh,
.markdown-body .highlight .mi,
.markdown-body .highlight .mo,
.markdown-body .highlight .il,
.markdown-body .highlight .m {
color: #945277;
}
.markdown-body .highlight .s,
.markdown-body .highlight .sb,
.markdown-body .highlight .sc,
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}</style><title>README</title></head><body><article class="markdown-body"><h1>
<a id="user-content-kddcup-2015-まとめ" class="anchor" href="#kddcup-2015-%E3%81%BE%E3%81%A8%E3%82%81" aria-hidden="true"><span class="octicon octicon-link"></span></a>KDDCUP 2015 まとめ</h1>
<ul>
<li><p><a href="https://kddcup2015.com/information.html">公式サイト</a></p></li>
<li><p>参加チーム : 最終的に821チーム</p></li>
<li><p>半分のテストデータのランキング : 最終的に 71位 , AUC = 0.88926くらい</p></li>
</ul>
<h2>
<a id="user-content-プロセス" class="anchor" href="#%E3%83%97%E3%83%AD%E3%82%BB%E3%82%B9" aria-hidden="true"><span class="octicon octicon-link"></span></a>プロセス</h2>
<ul>
<li><p>特徴作り -> モデル作り -> (アンサンブル)</p></li>
<li><p>生のデータからの 特徴作りは C++ を用いて行い, それ以外は R で行った.</p></li>
</ul>
<h2>
<a id="user-content-問題" class="anchor" href="#%E5%95%8F%E9%A1%8C" aria-hidden="true"><span class="octicon octicon-link"></span></a>問題</h2>
<ul>
<li><p>中国の <a href="https://ja.wikipedia.org/wiki/Massive_open_online_course">MOOC</a> (XuetangX) のアクセスログを用いて
利用者がDropoutするかどうかを予想する.</p></li>
<li><p>Dropoutの定義 : アクセスログの集計期間の終了日から10日間以内にアクセスログを残していない場合.</p></li>
<li><p>基本的にアクセスログから特徴量を作る. (訓練:約12万, テスト:約8万インスタンス, テストのラベルは与えられない)</p></li>
</ul>
<p>train データのアクセスログ (testもこの形式)</p>
<pre><code>enrollment_id,time,source,event,object
1,2014-06-14T09:38:29,server,navigate,Oj6eQgzrdqBMlaCtaq1IkY6zruSrb71b <- ここから
1,2014-06-14T09:38:39,server,access,3T6XwoiMKgol57cm29Rjy8FXVFcIomxl
1,2014-06-14T09:38:39,server,access,qxvBNYTfiRkNcCvM0hcGwG6hvHdQwnd4
1,2014-06-14T09:38:48,server,access,2cmZrZW2h6Il91itO3e89FGcABLWhf3W
1,2014-06-14T09:41:49,browser,problem,RMtgC2bTAqEeftenUUyia504wsyzeZWf
1,2014-06-14T09:41:50,browser,problem,RMtgC2bTAqEeftenUUyia504wsyzeZWf
.....
1,2014-07-11T09:32:28,browser,problem,zt9gsIMTOqzqxuFRa1dDT58JBFRdLX3O
1,2014-07-11T09:32:28,browser,problem,zt9gsIMTOqzqxuFRa1dDT58JBFRdLX3O
1,2014-07-11T09:52:56,server,navigate,vPJ7ada7OqDfvYXMjnTQC3NExmLvWiUL
1,2014-07-11T09:52:58,browser,page_close,3T6XwoiMKgol57cm29Rjy8FXVFcIomxl <- ここまで1つのインスタンス
3,2014-06-19T08:43:27,server,navigate,9Mur5ciTV9IBFfcPaz5c3nC1lrZaxBvG
3,2014-06-19T08:43:41,server,navigate,9Mur5ciTV9IBFfcPaz5c3nC1lrZaxBvG
3,2014-06-19T08:43:42,server,navigate,9Mur5ciTV9IBFfcPaz5c3nC1lrZaxBvG
.....
</code></pre>
<h2>
<a id="user-content-感想" class="anchor" href="#%E6%84%9F%E6%83%B3" aria-hidden="true"><span class="octicon octicon-link"></span></a>感想</h2>
<p>特徴作りが重要なコンペティションだったと思う. (コンペティションに参加したのは初めて)
学習でstackingなどのモデルのアンサンブルなどを試したが, gradient boost 単体よりも良くならない.</p>
<h4>
<a id="user-content-使えると思ったrのパッケージ" class="anchor" href="#%E4%BD%BF%E3%81%88%E3%82%8B%E3%81%A8%E6%80%9D%E3%81%A3%E3%81%9Fr%E3%81%AE%E3%83%91%E3%83%83%E3%82%B1%E3%83%BC%E3%82%B8" aria-hidden="true"><span class="octicon octicon-link"></span></a>使えると思ったRのパッケージ</h4>
<ol>
<li>
<a href="https://github.com/dmlc/xgboost">xgboost</a> - gradient boost. (gbmよりかなり速い, CRANにはない)</li>
<li>
<a href="http://cran.r-project.org/web/packages/randomForest/randomForest.pdf">randomForest</a> - 並列計算できない.</li>
<li>
<a href="http://cran.r-project.org/web/packages/extraTrees/extraTrees.pdf">extraTrees</a> - Extremely Randomized Trees.</li>
<li>
<a href="http://cran.r-project.org/web/packages/FNN/FNN.pdf">FNN</a> - k-NN.</li>
<li>
<a href="http://cran.r-project.org/web/packages/Rtsne/Rtsne.pdf">Rtsne</a> - t-SNE.</li>
<li>
<a href="http://cran.r-project.org/web/packages/LiblineaR/LiblineaR.pdf">LiblineaR</a> - liblinear</li>
<li>
<a href="http://cran.r-project.org/web/packages/kernlab/kernlab.pdf">kernlab</a> - kernel SVM など.</li>
<li>
<a href="http://cran.r-project.org/web/packages/rgl/rgl.pdf">rgl</a> - 3次元プロットができる. OpenGLベース. htmlで保存できて, R環境がなくてもマウスでグリグリできる. <a href="https://www.dropbox.com/s/skoo1iazx4ohqph/index.html?raw=1">e.g.</a>
</li>
<li>
<a href="http://cran.r-project.org/web/packages/GGally/GGally.pdf">GGally</a> - 特徴同士を格子状に配列し, 関係を把握するpair plot(下の図).
<a href="/Users/Shibagaki/GitHub/kddcup2015/figure/pair_plot/pair_26.pdf" target="_blank"><img src="/Users/Shibagaki/GitHub/kddcup2015/figure/pair_plot/pair_26.pdf" alt="e.g." style="max-width:100%;"></a>
</li>
</ol>
<h4>
<a id="user-content-参考にしたwebページ" class="anchor" href="#%E5%8F%82%E8%80%83%E3%81%AB%E3%81%97%E3%81%9Fweb%E3%83%9A%E3%83%BC%E3%82%B8" aria-hidden="true"><span class="octicon octicon-link"></span></a>参考にしたwebページ</h4>
<ul>
<li><p><a href="http://www.slideshare.net/nishio/kaggle-otto">実践多クラス分類 Kaggle Ottoから学んだこと</a></p></li>
<li><p><a href="http://mlwave.com/kaggle-ensembling-guide/">KAGGLE ENSEMBLING GUIDE</a></p></li>
<li><p><a href="http://www.kdd.org/kddcup2013/sites/default/files/papers/track1place1.pdf">KDD Cup 2013 1位paper</a></p></li>
</ul>
<h2>
<a id="user-content-特徴量" class="anchor" href="#%E7%89%B9%E5%BE%B4%E9%87%8F" aria-hidden="true"><span class="octicon octicon-link"></span></a>特徴量</h2>
<table>
<thead>
<tr>
<th align="left">番号</th>
<th>内容</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left">1</td>
<td>3分間のイベントを1回としてカウント</td>
</tr>
<tr>
<td align="left">2</td>
<td>max(0, log( 特徴1))</td>
</tr>
<tr>
<td align="left">3</td>
<td>30分間のイベントを1回としてカウント</td>
</tr>
<tr>
<td align="left">4</td>
<td>max(0, log( 特徴3))</td>
</tr>
<tr>
<td align="left">5</td>
<td>3時間のイベントを1回としてカウント</td>
</tr>
<tr>
<td align="left">6</td>
<td>max(0, log( 特徴5))</td>
</tr>
<tr>
<td align="left">7</td>
<td>1日のイベントを1回としてカウント</td>
</tr>
<tr>
<td align="left">8</td>
<td>max(0, log( 特徴7))</td>
</tr>
<tr>
<td align="left">9</td>
<td>0 - 3 時のイベント回数</td>
</tr>
<tr>
<td align="left">10</td>