{"id":598,"date":"2023-11-09T17:43:02","date_gmt":"2023-11-09T09:43:02","guid":{"rendered":"http:\/\/ai.gitpp.com\/?p=598"},"modified":"2023-11-09T17:43:02","modified_gmt":"2023-11-09T09:43:02","slug":"%e6%94%af%e6%8c%81%e5%90%91%e9%87%8f%e6%9c%ba%ef%bc%88%e7%ae%80%e7%a7%b0-svm%ef%bc%89","status":"publish","type":"post","link":"http:\/\/ai.gitpp.com\/index.php\/2023\/11\/09\/%e6%94%af%e6%8c%81%e5%90%91%e9%87%8f%e6%9c%ba%ef%bc%88%e7%ae%80%e7%a7%b0-svm%ef%bc%89\/","title":{"rendered":"\u652f\u6301\u5411\u91cf\u673a\uff08\u7b80\u79f0 SVM\uff09"},"content":{"rendered":"\n<p>\u652f\u6301\u5411\u91cf\u673a\uff08Support Vector Machine\uff0c\u7b80\u79f0 SVM\uff09\u662f\u4e00\u79cd\u7528\u4e8e\u89e3\u51b3\u5206\u7c7b\u548c\u56de\u5f52\u95ee\u9898\u7684\u673a\u5668\u5b66\u4e60\u7b97\u6cd5\u3002\u5b83\u901a\u8fc7\u627e\u5230\u4e00\u4e2a\u6700\u4f18\u8d85\u5e73\u9762\uff08\u6216\u56de\u5f52\u51fd\u6570\uff09\uff0c\u5c06\u4e0d\u540c\u7c7b\u522b\u7684\u6570\u636e\u5206\u5f00\uff0c\u6216\u62df\u5408\u89c2\u6d4b\u6570\u636e\u3002\u652f\u6301\u5411\u91cf\u673a\u5177\u6709\u8f83\u5f3a\u7684\u6cdb\u5316\u80fd\u529b\uff0c\u80fd\u591f\u5904\u7406\u9ad8\u7ef4\u7a7a\u95f4\u95ee\u9898\u3002<br>\u652f\u6301\u5411\u91cf\u673a\u7684\u4e3b\u8981\u7ec4\u6210\u90e8\u5206\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6838\u51fd\u6570\uff08Kernel\uff09\uff1a\u7528\u4e8e\u5c06\u6570\u636e\u6620\u5c04\u5230\u9ad8\u7ef4\u7a7a\u95f4\uff0c\u4ee5\u4fbf\u5728\u9ad8\u7ef4\u7a7a\u95f4\u4e2d\u627e\u5230\u6700\u4f18\u8d85\u5e73\u9762\u3002\u5e38\u89c1\u7684\u6838\u51fd\u6570\u6709\u7ebf\u6027\u6838\u3001\u591a\u9879\u5f0f\u6838\u3001\u5f84\u5411\u57fa\u51fd\u6570\uff08RBF\uff09\u6838\u7b49\u3002<\/li>\n\n\n\n<li>\u652f\u6301\u5411\u91cf\uff08Support Vectors\uff09\uff1a\u5728\u8bad\u7ec3\u96c6\u4e2d\uff0c\u652f\u6301\u5411\u91cf\u662f\u90a3\u4e9b\u5bf9\u5206\u7c7b\u8fb9\u754c\u5f71\u54cd\u6700\u5927\u7684\u6837\u672c\u3002\u652f\u6301\u5411\u91cf\u673a\u7684\u76ee\u6807\u662f\u627e\u5230\u4e00\u4e2a\u8d85\u5e73\u9762\uff0c\u4f7f\u5f97\u4e24\u7c7b\u652f\u6301\u5411\u91cf\u4e4b\u95f4\u7684\u8ddd\u79bb\uff08\u5373\u5206\u7c7b\u8fb9\u754c\uff09\u6700\u5927\u5316\u3002<\/li>\n\n\n\n<li>\u6700\u4f18\u8d85\u5e73\u9762\uff08Optimal Hyperplane\uff09\uff1a\u901a\u8fc7\u6700\u5927\u5316\u652f\u6301\u5411\u91cf\u4e0e\u5206\u7c7b\u8fb9\u754c\u4e4b\u95f4\u7684\u8ddd\u79bb\uff0c\u627e\u5230\u4e00\u4e2a\u6700\u4f18\u7684\u8d85\u5e73\u9762\u3002\u5728\u5206\u7c7b\u95ee\u9898\u4e2d\uff0c\u6700\u4f18\u8d85\u5e73\u9762\u5c06\u4e0d\u540c\u7c7b\u522b\u7684\u652f\u6301\u5411\u91cf\u5206\u5f00\uff1b\u5728\u56de\u5f52\u95ee\u9898\u4e2d\uff0c\u6700\u4f18\u8d85\u5e73\u9762\u62df\u5408\u652f\u6301\u5411\u91cf\u3002<br>\u5728 Python \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 libsvm \u5e93\u6765\u5b9e\u73b0\u652f\u6301\u5411\u91cf\u673a\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff1a<\/li>\n\n\n\n<li>\u9996\u5148\uff0c\u5b89\u88c5 libsvm\uff1a<br>&#8220;`bash<br>pip install libsvm<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>2. \u51c6\u5907\u6570\u636e\u96c6\uff1a<\/code><\/pre>\n\n\n\n<p>python<br>from sklearn.datasets import load_iris<br>iris = load_iris()<br>X = iris.data<br>y = iris.target<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>3. \u5212\u5206\u8bad\u7ec3\u96c6\u548c\u6d4b\u8bd5\u96c6\uff1a<\/code><\/pre>\n\n\n\n<p>python<br>from sklearn.model_selection import train_test_split<br>X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.3, random_state=42)<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>4. \u521d\u59cb\u5316\u53c2\u6570\uff1a<\/code><\/pre>\n\n\n\n<p>python<br>from svm import SVC<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u521b\u5efa\u652f\u6301\u5411\u91cf\u673a\u5b9e\u4f8b<\/h1>\n\n\n\n<p>svm = SVC(kernel=&#8217;linear&#8217;, C=1.0, probability=True)<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>5. \u8bad\u7ec3\u6a21\u578b\uff1a<\/code><\/pre>\n\n\n\n<p>python<br>svm.fit(X_train, y_train)<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>6. \u9884\u6d4b\uff1a<\/code><\/pre>\n\n\n\n<p>python<br>y_pred = svm.predict(X_test)<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>7. \u8bc4\u4f30\u6a21\u578b\uff1a<\/code><\/pre>\n\n\n\n<p>python<br>from sklearn.metrics import accuracy_score<br>print(&#8216;\u652f\u6301\u5411\u91cf\u673a\u5206\u7c7b\u51c6\u786e\u7387\uff1a&#8217;, accuracy_score(y_test, y_pred))<br>&#8220;`<br>\u4ee5\u4e0a\u4ee3\u7801\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u652f\u6301\u5411\u91cf\u673a\u8fdb\u884c\u5206\u7c7b\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u5c1d\u8bd5\u4e0d\u540c\u7684\u6838\u51fd\u6570\u548c\u53c2\u6570\u6765\u4f18\u5316\u6a21\u578b\u6027\u80fd\u3002\u652f\u6301\u5411\u91cf\u673a\u9002\u7528\u4e8e\u5404\u79cd\u5206\u7c7b\u548c\u56de\u5f52\u95ee\u9898\uff0c\u4f8b\u5982\u6587\u672c\u5206\u7c7b\u3001\u56fe\u50cf\u8bc6\u522b\u7b49\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u652f\u6301\u5411\u91cf\u673a\uff08Support Vector Machine\uff0c\u7b80\u79f0 SVM\uff09\u662f\u4e00\u79cd\u7528\u4e8e\u89e3\u51b3\u5206\u7c7b\u548c\u56de\u5f52\u95ee\u9898\u7684\u673a\u5668\u5b66\u4e60 [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-598","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"blocksy_meta":"","_links":{"self":[{"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/posts\/598","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/comments?post=598"}],"version-history":[{"count":1,"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/posts\/598\/revisions"}],"predecessor-version":[{"id":599,"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/posts\/598\/revisions\/599"}],"wp:attachment":[{"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/media?parent=598"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/categories?post=598"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/tags?post=598"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}