{"id":4503,"date":"2019-06-26T08:02:41","date_gmt":"2019-06-26T00:02:41","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=4503"},"modified":"2019-06-26T08:02:41","modified_gmt":"2019-06-26T00:02:41","slug":"%e6%9c%ba%e5%99%a8%e5%ad%a6%e4%b9%a0-%e9%99%8d%e7%bb%b4%e7%ae%97%e6%b3%95-lda","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/4503.html","title":{"rendered":"\u673a\u5668\u5b66\u4e60-\u964d\u7ef4\u7b97\u6cd5-LDA"},"content":{"rendered":"\n<p>=Start=<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"id-\u6a21\u677f-\u7f18\u7531\uff1a\">\u7f18\u7531\uff1a<\/h4>\n\n\n\n<p>\u5bf9\u4e8e\u6700\u8fd1\u5728\u770b\u5176\u4e2d\u7684\u4e00\u4e9b\u673a\u5668\u5b66\u4e60\u76f8\u5173\u7684\u5185\u5bb9\u65f6\uff0c\u6682\u65f6\u53ea\u5173\u5fc3\u5176\u5927\u81f4\u7684\u539f\u7406\u8bf4\u660e\u548c\u76f8\u5173\u5bf9\u6bd4\uff0c\u5bf9\u4e8e\u6570\u5b66\u7684\u63a8\u5bfc\u548c\u7ec6\u8282\u5148\u653e\u5230\u4e00\u8fb9\uff0c\u4ee5\u540e\u5982\u679c\u6709\u673a\u4f1a\u7684\u8bdd\u518d\u505a\u4e86\u89e3\uff0c\u8fd9\u91cc\u5148\u8bb0\u5f55\u4e00\u4e9b\uff08\u4ece\u5176\u5b83\u6bd4\u8f83\u597d\u7684\u4e66\u7c4d\u3001\u6587\u7ae0\u4e2d\uff09\u6574\u7406\u51fa\u7684\u7ed3\u8bba\u548c\u7279\u70b9\u8bf4\u660e\uff0c\u65b9\u4fbf\u5feb\u901f\u7406\u89e3\u52a0\u6df1\u5370\u8c61\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"id-\u6a21\u677f-\u6b63\u6587\uff1a\">\u6b63\u6587\uff1a<\/h4>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"id-\u6a21\u677f-\u53c2\u8003\u89e3\u7b54\uff1a\">\u53c2\u8003\u89e3\u7b54\uff1a<\/h5>\n\n\n\n<h6 class=\"wp-block-heading\"><strong>LDA\u539f\u7406\u7b80\u4ecb<\/strong><\/h6>\n\n\n\n<p><strong>\u7ebf\u6027\u5224\u522b\u5206\u6790(Linear Discriminant Analysis, LDA) \u662f\u4e00\u79cd\u76d1\u7763\u5b66\u4e60\u7684\u964d\u7ef4\u65b9\u6cd5\uff0c\u4e5f\u5c31\u662f\u8bf4\u6570\u636e\u96c6\u7684\u6bcf\u4e2a\u6837\u672c\u662f\u6709\u7c7b\u522b\u8f93\u51fa\u7684\u3002<\/strong>\u548c\u4e4b\u524d\u4ecb\u7ecd\u7684\u673a\u5668\u5b66\u4e60-\u964d\u7ef4\u7b97\u6cd5-PCA\u4e0d\u540c\uff0c<strong>PCA\u662f\u4e0d\u8003\u8651\u6837\u672c\u7c7b\u522b\u8f93\u51fa\u7684\u65e0\u76d1\u7763\u5b66\u4e60\u65b9\u6cd5\u3002<\/strong><\/p>\n\n\n\n<p>LDA\u7684\u539f\u7406\u7b80\u5355\u6765\u8bf4\u5c31\u662f\u5c06\u5e26\u4e0a\u6807\u7b7e\u7684\u6570\u636e\uff08\u70b9\uff09\uff0c\u901a\u8fc7\u6295\u5f71\u7684\u65b9\u6cd5\uff0c\u6295\u5f71\u5230\u7ef4\u5ea6\u66f4\u4f4e\u7684\u7a7a\u95f4\u4e2d\uff0c\u4f7f\u5f97\u6295\u5f71\u540e\u7684\u70b9\u4f1a\u5f62\u6210\u6309\u7c7b\u522b\u533a\u5206\u3002\u800c\u6211\u4eec\u7684\u76ee\u6807\u5c31\u662f\u4f7f\u5f97\u6295\u5f71\u540e\u7684\u6570\u636e\uff0c<strong>\u7c7b\u95f4\u65b9\u5dee\u6700\u5927\uff0c\u7c7b\u5185\u65b9\u5dee\u6700\u5c0f\u3002<\/strong><\/p>\n\n\n\n<h6 class=\"wp-block-heading\"><strong>LDA\u548cPCA\u7684\u5f02\u540c\u70b9\u6bd4\u8f83<\/strong><\/h6>\n\n\n\n<p>LDA\u548cPCA\u6709\u5f88\u591a\u76f8\u540c\u70b9\u548c\u4e0d\u540c\u70b9\uff0c\u6211\u4eec\u6765\u5bf9\u6bd4\u770b\u770b\u4e24\u8005\u7684\u533a\u522b\u3002<\/p>\n\n\n\n<p><strong>\u76f8\u540c\u70b9\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u4e24\u8005\u5747\u53ef\u5bf9\u6570\u636e\u8fdb\u884c\u964d\u7ef4\u3002<\/li><li>\u4e24\u8005\u5728\u964d\u7ef4\u65f6\u5747\u4f7f\u7528\u4e86\u77e9\u9635\u7279\u5f81\u5206\u89e3\u7684\u601d\u60f3\u3002<\/li><li>\u4e24\u8005\u90fd\u5047\u8bbe\u6570\u636e\u7b26\u5408\u9ad8\u65af\u5206\u5e03\u3002<\/li><\/ul>\n\n\n\n<p><strong>\u4e0d\u540c\u70b9\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>LDA\u662f\u6709\u76d1\u7763\u7684\u964d\u7ef4\u65b9\u6cd5\uff0c\u800cPCA\u662f\u65e0\u76d1\u7763\u7684\u964d\u7ef4\u65b9\u6cd5\u3002<\/strong><\/li><li>LDA\u964d\u7ef4\u6700\u591a\u964d\u5230\u7c7b\u522b\u6570k-1\u7684\u7ef4\u6570\uff0c\u800cPCA\u65e0\u6b64\u9650\u5236\u3002<\/li><li><strong>LDA\u9009\u62e9\u5206\u7c7b\u6027\u80fd\u6700\u597d\u7684\u6295\u5f71\u65b9\u5411\uff0c\u800cPCA\u9009\u62e9\u6837\u672c\u70b9\u6295\u5f71\u5177\u6709\u6700\u5927\u65b9\u5dee\u7684\u65b9\u5411\u3002<\/strong><\/li><\/ul>\n\n\n\n<p>\u5728\u4e0d\u540c\u6570\u636e\u7684\u60c5\u51b5\u4e0b\uff0cLDA\u548cPCA\u964d\u7ef4\u65b9\u6cd5\u5404\u6709\u4f18\u52a3\u3002<\/p>\n\n\n\n<h6 class=\"wp-block-heading\"><strong>LDA\u7b97\u6cd5\u4f18\u7f3a\u70b9\u603b\u7ed3<\/strong><\/h6>\n\n\n\n<p><strong>LDA\u4f18\u70b9\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>\u5728\u964d\u7ef4\u8fc7\u7a0b\u4e2d\u53ef\u4ee5\u4f7f\u7528\u7c7b\u522b\u7684\u5148\u9a8c\u77e5\u8bc6\u7ecf\u9a8c\uff0c\u800cPCA\u8fd9\u79cd\u65e0\u76d1\u7763\u5b66\u4e60\u5219\u65e0\u6cd5\u4f7f\u7528\u7c7b\u522b\u5148\u9a8c\u77e5\u8bc6\u3002<\/strong><\/li><\/ul>\n\n\n\n<p><strong>LDA\u7f3a\u70b9\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>LDA\u53ef\u80fd\u8fc7\u5ea6\u62df\u5408\u6570\u636e\u3002<\/li><li>LDA\u4e0d\u9002\u5408\u5bf9\u975e\u9ad8\u65af\u5206\u5e03\u6837\u672c\u8fdb\u884c\u964d\u7ef4\uff0cPCA\u4e5f\u6709\u8fd9\u4e2a\u95ee\u9898\u3002<\/li><li>LDA\u964d\u7ef4\u6700\u591a\u964d\u5230\u7c7b\u522b\u6570k-1\u7684\u7ef4\u6570\uff0c\u5982\u679c\u6211\u4eec\u964d\u7ef4\u7684\u7ef4\u6570\u5927\u4e8ek-1\uff0c\u5219\u4e0d\u80fd\u4f7f\u7528LDA\u3002<\/li><\/ul>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"id-\u6a21\u677f-\u53c2\u8003\u94fe\u63a5\uff1a\">\u53c2\u8003\u94fe\u63a5\uff1a<\/h5>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>\u673a\u5668\u5b66\u4e60\u964d\u7ef4\u4e4b\u7ebf\u6027\u5224\u522b\u6a21\u578b(LDA)<\/strong><br><a href=\"https:\/\/blog.csdn.net\/XiaoYi_Eric\/article\/details\/86691438\">https:\/\/blog.csdn.net\/XiaoYi_Eric\/article\/details\/86691438<\/a><\/li><li>PCA\u4e3b\u6210\u5206\u5206\u6790\u5b66\u4e60\u603b\u7ed3<br><a href=\"https:\/\/zhuanlan.zhihu.com\/p\/32412043\">https:\/\/zhuanlan.zhihu.com\/p\/32412043<\/a><\/li><li>LDA\u7ebf\u6027\u5224\u522b\u5206\u6790<br><a href=\"https:\/\/zhuanlan.zhihu.com\/p\/32658341\">https:\/\/zhuanlan.zhihu.com\/p\/32658341<\/a><\/li><\/ul>\n\n\n\n<p>=END=<\/p>\n","protected":false},"excerpt":{"rendered":"<p>=Start= \u7f18\u7531\uff1a \u5bf9\u4e8e\u6700\u8fd1\u5728\u770b\u5176\u4e2d\u7684\u4e00\u4e9b\u673a\u5668\u5b66\u4e60\u76f8\u5173\u7684\u5185\u5bb9\u65f6\uff0c\u6682\u65f6\u53ea\u5173\u5fc3\u5176\u5927\u81f4\u7684\u539f\u7406\u8bf4\u660e\u548c\u76f8\u5173\u5bf9\u6bd4\uff0c\u5bf9\u4e8e [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,1275],"tags":[1445,1441,9,1444],"class_list":["post-4503","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-1275","tag-lda","tag-machinelearning","tag-9","tag-1444"],"views":3550,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/4503","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=4503"}],"version-history":[{"count":1,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/4503\/revisions"}],"predecessor-version":[{"id":4504,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/4503\/revisions\/4504"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=4503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=4503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=4503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}