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机器学习
孙瑜 - 机器学习
孙瑜的个人首页：生物信息、数据科学、软件工程，以及公开简历、项目和文章。
Zola2018-07-16T00:00:00+00:00https://www.bigdick.live/tags/ji-qi-xue-xi/atom.xml
用R完成SVM和ANN模型预测并评估
2018-07-16T00:00:00+00:00
2018-07-16T00:00:00+00:00
孙瑜
https://www.bigdick.live/blog/svm-ann-model-evaluation-r/
<p>SVM和ANN就早有耳闻了，无奈R里面的轮子真是乱。难得最近有心情了，利用空余时间把这个项目重新用caret撸一遍。</p>
<h2 id="shu-ju-yu-chu-li">数据预处理</h2>
<p>这个数据长这个蛋样的（<code>str()</code>的结果）：</p>
<pre class="giallo z-code"><code data-lang="plain"><span class="giallo-l"><span>Classes ‘data.table’ and 'data.frame': 164 obs. of 18 variables:</span></span>
<span class="giallo-l"><span> $ SampleID: int 10086901 10086902 10086924 10086934 10042716 10042715 10042718 10042719 10042732 10042733 ...</span></span>
<span class="giallo-l"><span> $ PEDF : int 107635 136455 130085 106695 110565 131440 83305 178960 579090 117355 ...</span></span>
<span class="giallo-l"><span> $ SP-B : num 61.4 61.4 61.4 928.2 558 ...</span></span>
<span class="giallo-l"><span> $ Galectin: num 67.1 85.7 124 94.2 69.8 ...</span></span>
<span class="giallo-l"><span> $ FTL : num 1327 750 2065 1914 1563 ...</span></span>
<span class="giallo-l"><span> $ AKAP4 : num 2701 2286 2147 2640 885 ...</span></span>
<span class="giallo-l"><span> $ LUM : num 109 0 83.3 92.7 56.7 ...</span></span>
<span class="giallo-l"><span> $ COL : num 1469 864 1012 1644 1104 ...</span></span>
<span class="giallo-l"><span> $ MASP1 : int 282690 409725 240220 523840 245555 139960 15405 632280 2198900 440850 ...</span></span>
<span class="giallo-l"><span> $ ITG-b1 : num 257 185 255 462 186 ...</span></span>
<span class="giallo-l"><span> $ PTPRJ : num 351.5 328.9 446.9 41.2 417.3 ...</span></span>
<span class="giallo-l"><span> $ Gelsolin: num 1273 798 758 864 665 ...</span></span>
<span class="giallo-l"><span> $ TSP-1 : num 463900 216520 191805 256615 222151 ...</span></span>
<span class="giallo-l"><span> $ ZYX : num 502 439 541 664 204 ...</span></span>
<span class="giallo-l"><span> $ CD163 : num 40.8 46.8 43.3 58.6 59.3 ...</span></span>
<span class="giallo-l"><span> $ FDA : num 186 164 152 288 233 ...</span></span>
<span class="giallo-l"><span> $ PC : num 528 335 321 337 244 ...</span></span>
<span class="giallo-l"><span> $ Status : int 0 0 0 1 1 1 1 1 1 1 ...</span></span>
<span class="giallo-l"><span> - attr(*, ".internal.selfref")=<externalptr> </span></span></code></pre><h2 id="svmpian">SVM篇</h2>