{"id":345,"date":"2018-07-30T10:08:45","date_gmt":"2018-07-30T02:08:45","guid":{"rendered":"https:\/\/luke6887.me\/?p=345"},"modified":"2018-08-06T21:16:12","modified_gmt":"2018-08-06T13:16:12","slug":"mis772-a1-%e7%9b%ae%e6%a0%87%e6%a0%b7%e6%9c%ac%e6%95%b0%e5%a4%aa%e5%b0%91%e7%9a%84%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"https:\/\/blog.luke6887.me\/?p=345","title":{"rendered":"MIS772 &#8211; A1 \u53ef\u80fd\u5b58\u5728\u7684\u95ee\u9898\u4e0e\u4e00\u4e9b\u60f3\u6cd5-from discussion board"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5f88\u660e\u663e\u6700\u8fd1\u4e00\u4e24\u4e2a\u661f\u671f\u90fd\u5fd9\uff0c\u5fd9772\u7684assignment1. \u867d\u7136assignment 1\u7684\u76ee\u7684\u53ea\u662f\u8ba9\u6211\u4eec\u719f\u6089Rapidminer\u8fd9\u4e2a\u5de5\u5177\uff0c\u4f46\u56e0\u4e3a\u6570\u636e\u7684\u95ee\u9898\uff0c\u60f3\u8981\u505a\u597d\u8fd8\u662f\u633a\u9ebb\u70e6\u7684\u3002\u3002<\/p>\n\n\n<p><!--more--><\/p>\n\n\n<p class=\"wp-block-paragraph\">\u6570\u636e\u96c6\u662f\u5305\u542b3000\u4e2a\u6837\u672c\u7684\u5de5\u4f5c\u4fdd\u9669\u6570\u636e\uff0c\u5305\u542b\u4ee5\u4e0b\u7684\u53d8\u91cf\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u4fdd\u9669\u53f7ID\uff0cID\uff0c\u4e0d\u5e76\u4e0d\u7b97\u5728\u5206\u6790\u8303\u56f4\u5185<\/li><li>\u8be6\u60c5\u8bb0\u53f7\uff0c\u4e00\u5806\u6587\u672c\uff0c\u4e5f\u4e0d\u7b97\u8fd1\u5206\u6790\u8303\u56f4\u5185<\/li><li>\u4fdd\u9669\u7684\u7406\u7531\uff0c\u8d77\u56e0\uff0c\u4ee5\u53ca\u635f\u4f24\u7684\u8eab\u4f53\u5904\uff0c\u7b97\u662f\u591a\u9879\uff0c\u7b97\u5728\u5206\u6790\u8303\u56f4\u5185<\/li><li>\u7b2c\u4e09\u65b9\u8d23\u4efb\u7684tag\u8ddf\u5305\u542b\u6c7d\u8f66\u7684tag\uff0c\u56e0\u4e3a\u53ea\u67090\u548c1\uff0c\u7b97\u5728\u5206\u6790\u8303\u56f4\u5185<\/li><li>\u88ab\u786e\u8ba4\u9a97\u4fdd\u7684tag\uff0c\u4e5f\u662f\u53ea\u67090\u548c1\uff0c\u662f\u4e3b\u8981\u7684\u9884\u6d4b\u5bf9\u8c61<br\/><\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6b21\u7684\u6570\u636e\u96c6\u6700\u5927\u7684\u95ee\u9898\u662f\u6837\u672c\u7684\u4e0d\u5e73\u8861\u3002\u3002\u4f5c\u4e3a\u88abpredict\u7684\u76ee\u6807\u9a97\u4fddtag\uff0c3000\u4e2a\u6837\u672c\u91cc\u9762\u53ea\u670993\u4e2a\u662f\u6b63\u7684\uff0c\u8fd9\u6837\u7684\u8bdd\u4e00\u822c\u60c5\u51b5\u7684\u5efa\u6a21\u80af\u5b9a\u6027\u80fd\u4f1a\u5f88\u7cdf\u7cd5\u7684\uff0c\u56e0\u4e3a\u5927\u591a\u6570\u6a21\u578b\u90fd\u662f\u5bf9\u5404\u4e2a\u60c5\u51b5\u201c\u4eba\u4eba\u5e73\u7b49\u201d\u7684\uff0c\u67d0\u7c7b\u6837\u672c\u5c11\u7684\u8bdd\u5c31\u5f88\u96be\u5b66\u4e60\u5230\u8fd9\u79cd\u5c11\u6570\u7c7b\u6837\u672c\u4e86\uff0c\u6709\u4e9b\u751a\u81f3\u5728\u5b66\u4e60\u7684\u65f6\u5019\u6839\u672c\u5c31\u5ffd\u7565\u4e86\u8fd9\u7c7b\u6837\u672c\uff0c\u5f97\u51fa\u6765\u7684\u6a21\u578b\u5c31\u4e0e\u201c\u9884\u6d4b\u5c0f\u6570\u6d3e\u201d\u8fd9\u4e2a\u76ee\u7684\u80cc\u9053\u800c\u9a70\u4e86\u3002\u4e0d\u8fc7\u8001\u5e08\u8c8c\u4f3c\u4e5f\u9884\u6599\u5230\u6211\u4eec\u505a\u51fa\u6765\u7684\u6027\u80fd\u4e0d\u4f1a\u597d\u3002\u3002\u5c31\u8bf4\u76ee\u7684\u662f\u8ba9\u6211\u4eec\u719f\u6089Rapidminer\u7684\u64cd\u4f5c\u800c\u5df2\u3002\u3002\u55ef_(:\u0437\u300d\u2220)_<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u867d\u7136\u8001\u5e08\u8bf4\u662f\u4e0d\u8ffd\u6c42\u6027\u80fd\uff0c\u628a\u8fc7\u7a0b\u505a\u51fa\u6765\u5c31\u597d\u540d\u5355\u8fd8\u662f\u4ecb\u7ecd\u4e86\u70b9\u5e94\u5bf9\u4e0d\u5e73\u8861\u6570\u636e\u7684\u529e\u6cd5\u7684\uff0c\u5927\u6982\u6709\u8fd9\u4e48\u51e0\u79cd\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u6539\u5584\u91c7\u6837<\/li><li>\u6362\u6a21\u578b\uff0c\u6216\u8005\u6a21\u578b\u7684ensemble<\/li><li>\u7528loop operators\u5c1d\u8bd5\u6a21\u578b\u7684\u53c2\u6570\uff0c\u8c03\u6574Threshold<br\/><\/li><li>\u4ee5\u53ca\u6539\u7528\u5176\u4ed6\u7684\u6a21\u578b\u6027\u80fd\u8bc4\u5224\u65b9\u6cd5<\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u6539\u5584\u91c7\u6837<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u9700\u8981\u6ce8\u610f\u7684\u662f\u91c7\u6837\u6539\u5584\u540e\u7684\u6570\u636e\u53ea\u80fd\u7528\u4e8e\u6a21\u578b\u7684\u8bad\u7ec3\uff0c\u4e0d\u80fd\u62ff\u6765\u9a8c\u8bc1\u8ddf\u6d4b\u8bd5\u3002\u3002\u6bd5\u7adf\u5982\u679c\u8fde\u9a8c\u8bc1\u8ddf\u6d4b\u8bd5\u90fd\u662f\u7528\u91cd\u91c7\u6837\u7684\u201c\u6ce8\u6c34\u201d\u6570\u636e\u7684\u8bdd\uff0c\u5c31\u4e0d\u9002\u7528\u4e8e\u4e00\u822c\u7684\u573a\u666f\u4e86\u3002\u3002\uff08\u73b0\u5728\u770b\u8d77\u6765\u6027\u80fd\u5f88\u597d\uff0c\u4f46\u62ff\u51fa\u53bb\u4e86\u5f88\u7cdf\u7cd5\u3002\u3002\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3b\u8981\u8fd8\u662f\u5206\u4e24\u79cd\u601d\u8def\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u628a\u6b63\u8d1f\u6837\u672c\u5206\u5f00\u7136\u540e\u5355\u72ec\u5904\u7406<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u65b9\u6cd5\u867d\u7136\u542c\u8d77\u6765\u6bd4\u8f83\u7b80\u5355\uff0c\u4f46\u5b9e\u9645\u4e0a\u6413\u8d77operator\u6765\u662f\u8981\u6bd4\u7b2c\u4e8c\u79cd\u65b9\u6cd5\u8981\u7e41\u7410\u4e00\u70b9\u7684\u3002\u8fd9\u79cd\u5728\u8bfe\u5802\u4e0a\u53ebbalance sampling\uff0c\u4e5f\u6709\u8fd9\u4e48\u4e24\u79cd\u601d\u8def\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\u5355\u5355\u91c7\u7528\u4e00\u4e2asampling operator\uff0c\u628a\u53c2\u6570\u8c03\u6210balance sampling\uff0c\u50cf\u8fd9\u6837\uff1a<\/li><\/ol>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"467\" height=\"584\" src=\"https:\/\/luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog1.png\" alt=\"\" class=\"wp-image-409\" srcset=\"https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog1.png 467w, https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog1-240x300.png 240w\" sizes=\"auto, (max-width: 467px) 100vw, 467px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837\u53ea\u8981\u4ece\u8fd9\u4e2asample\u51fa\u6765\u7684\u6570\u636e\u5c31\u662f93\u4efd\u6b63\u8ddf93\u4efd\u8d1f\u7684\u6837\u672c\u4e86\u3002\u867d\u7136\u8fd9\u6837\u662f\u5e73\u8861\u4e86\uff0c\u4f46\u6709\u4e00\u4e2a\u5f88\u5927\u7684\u95ee\u9898\u662f\u8fd9\u6837\u7528\u6765\u8bad\u7ec3\u7684\u6837\u672c\u5c31\u53ea\u6709186\u4e2a\u4e86\uff0c\u52bf\u5fc5\u4f1a\u4e22\u6389\u5f88\u591a\u5f88\u591a\u7684\u6570\u636e\u8ddf\u7279\u5f81\uff0c\u6240\u4ee5\u8fd8\u6709\u522b\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2.\u628a\u6b63\u8d1f\u6837\u672c\u5206\u5f00\uff0c\u5c11\u6570\u7684\u6b63\u6837\u672c\u4e0a\u91c7\u6837\uff08up-sampling\uff09,\u591a\u6570\u7684\u8d1f\u6837\u672c\u4e0b\u91c7\u6837\uff08down-sampling\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837\u64cd\u4f5c\u5c31\u6bd4\u8f83\u7e41\u7410\u4e86\uff0c\uff08\u8ddf\u5176\u4ed6\u7684\u6bd4\u8d77\u6765\uff09\u8fc7\u7a0b\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"287\" src=\"https:\/\/luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog2.png\" alt=\"\" class=\"wp-image-412\" srcset=\"https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog2.png 640w, https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog2-300x135.png 300w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\u7528multiply\u628a\u6570\u636e\u590d\u5236\u6210\u4e24\u4efd\uff0c\u7136\u540e\u7528\u4e24\u4e2a\u8fc7\u6ee4\u5668(Filter), \u628a\u6570\u636e\u5206\u6210\u6709\u6b63\u6837\u672c\u8ddf\u8d1f\u6837\u672c\uff0c\u8f7d\u7136\u540e\u628a\u5c11\u6570\u7684\u6b63\u6837\u672c\u4e0a\u91c7\u6837\uff08\u4f8b\u5982\u50cf\u8fd9\u91cc\u7528boostrapping\u591a\u4e865\u500d\uff09\uff0c\u628a\u591a\u6570\u7684\u6837\u672c\u8d1f\u91c7\u6837\u5230\u8ddf\u6b63\u6837\u672c\u4e00\u6837\u7684\u6570\u91cf\uff0c\u518d\u7528append\u7cca\u5728\u4e00\u8d77\u3002\u8fd9\u5e94\u8be5\u7b97\u662f\u66f4\u8fdb\u4e00\u6b65\u7684\u91c7\u6837\u65b9\u5f0f\u4e86\uff0c\u4e0d\u4f1a\u8ba9\u6b63\u6837\u672c\u592a\u5c11\u6a21\u578b\u4e0d\u597d\u5b66\uff0c\u800c\u4e14\u7528\u8d77\u6765\u611f\u89c9\u6548\u679c\u4e5f\u8ddf\u4e0b\u9762\u7684SOMTE\u6bd4\u8f83\u8d34\u8fd1\u4e86\u3002\u3002\u7136\u800c\u8fd8\u662f\u4e0d\u592a\u591f\u4e86\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u91c7\u7528\u4e00\u4e9b\u7efc\u5408\u7684\u91c7\u6837\u7b97\u6cd5<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u55ef\u3002\u3002\u8fd9\u91cc\u5c31\u662f\u9996\u63a8SMOTE\u4e86\u3002\u4ecb\u7ecd\u770b\u8fd9\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-\u5d4c\u5165\u5904\u7406\u7a0b\u5e8f\">\nhttp:\/\/rikunert.com\/SMOTE_explained\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">emmm\u3002\u3002SMOTE\u662f\u600e\u4e48\u505a\u5230\u6539\u5584\u6837\u672c\u5c31\u53bb\u770b\u5427\u3002\u5728Rapidminer\u91cc\u9762\u6211\u4eec\u53ea\u662f\u9700\u8981\u5b89\u88c5Operation Toolbox\u63d2\u4ef6\uff0c\u7136\u540e\u628a\u8fd9\u4e2aoperator\u62d6\u8fdb\u53bb\u800c\u5df2\u3002\u3002\u8bb0\u4f4f\u662f\u53ea\u5904\u7406\u7528\u6765\u8bad\u7ec3\u6a21\u578b\u7684\u6570\u636e\uff0c\u9a8c\u8bc1\u8ddf\u6d4b\u8bd5\u4e0d\u8981\u7528\u8fd9\u79cd\u5904\u7406\u8fc7\u7684\u6570\u636e\u5c31\u597d\u3002\u4f4d\u7f6e\u7684\u8bdd\u4e00\u822c\u8ddf\u5728classifier\u524d\u9762\u5c31\u662f\u3002\u3002\u65e0\u8bba\u7528\u4e0d\u7528cross-validation\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u7136\uff0c\u9664\u4e86\u65e0\u8bba\u5728\u54ea\u91cc\u90fd\u9996\u63a8\u7684SMOTE\uff0c\u5176\u5b9e\u8fd8\u6709\u4e0d\u5c11\u5176\u4ed6\u7684\u91c7\u6837\u65b9\u6cd5\u7684\u3002\u8fd9\u65f6\u5019\u5c31\u63a8\u8350\u4e00\u4e2a\u53ebInformation Selection\u7684\u63d2\u4ef6\uff0c\u91cc\u9762\u4e5f\u6709\u4e0d\u5c11\u7684\u91c7\u6837\u63d2\u4ef6\u53ef\u4ee5\u7528\uff0c\u91cc\u9762\u6709\u4e9b\u4e5f\u4e0d\u6bd4SMOTE\u5dee\u3002\u3002\uff08\u8fd9\u6b21\u7528\u7684ENN\u8fd8\u884c\u6bd4SMOTE\u8fd8\u597d\u90a3\u4e48\u4e00\u4e01\u70b9\u3002\u3002\u55ef\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u7136\uff0c\u5982\u679c\u8981\u201c\u5b8c\u5168\u4f53\u7684\u91c7\u6837\u6539\u5584\u201d\uff0cRapidminer\u5c31\u7b97\u6709\u63d2\u4ef6\u52a0\u6301\uff0c\u5176\u5b9e\u4e5f\u6ca1\u6709\u4f20\u7edf\u7684R\u4e4b\u7c7b\u7684\u5de5\u5177\u8981\u591a\u529f\u80fd\u7684\u3002\u3002\u50cf\u6709\u4e9b\u50cf\u6539\u8fdb\u7684Borderline-SMOTE\uff0cEasy Ensemble\u4e4b\u7c7b\u7684Rapidminer\u6839\u672c\u627e\u4e0d\u5230\u3002\u3002\u611f\u89c9\u8fd8\u662f\u6709\u70b9\u5fc5\u8981\u6316\u5751\u7684\u3002<br\/><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u6362\u6a21\u578b\/\u6a21\u578bEnsemble<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u55ef\u3002\u3002\u5bf9\u4e8e\u8fd9\u6b21\u8fd9\u79cd\u603b\u6837\u672c\u6570\u5c11\uff0c\u6b63\u6837\u672c\u6570\u66f4\u5c11\u7684case\uff0c\u5355\u5728\u91c7\u6837\u65b9\u9762\u4e0b\u529b\u662f\u4e0d\u591f\u7684\u3002\u5728\u6a21\u578b\u7684\u9009\u62e9\u8ddf\u7ec4\u5408\u4e0a\u4e5f\u662f\u9887\u82b1\u529f\u592b\u7684\u3002\u5f53\u7136\uff0c\u4e0a\u8bfe\u65f6\u5019\u62ff\u6765\u5165\u95e8\u7684k-NN\u5df2\u7ecf\u4e0d\u592a\u9002\u5e94\u4e86\uff0c\u6362\u5148\u8fdb\u4e00\u70b9\u7684\u6a21\u578b+ensemble\u5c31\u6210\u4e86\u5927\u52bf\u6240\u8d8b\uff08\u5728\u8fd9assignment= =\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6a21\u578b\u7684ensemble\u4e3b\u8981\u6709\u4ee5\u4e0b\u8fd9\u4e48\u51e0\u79cd\u5f62\u5f0f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Vote<\/li><li>Bagging<\/li><li>Stacking<\/li><li>Boosting &#8211; \u53c8\u5206adaBoost \u8ddfGradient Boost<\/li><li>Random Forest \uff08\u611f\u89c9\u8868\u73b0\u4e0d\u592a\u597d\uff0c\u5e76\u4e0d\u4f1a\u7528\u3002\u3002\uff09<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cc\u9762\u7684vote\u5176\u5b9e\u7b97\u662fstacking\u7684\u4e00\u79cd\uff0c\u201c\u6295\u7968\u201d\u770b\u91cc\u9762\u7684\u6a21\u578b\u54ea\u4e2a\u597d\u5c31\u9009\u54ea\u4e2a\u800c\u5df2\u3002\u3002\u76f4\u89c2\u70b9\u7684\u533a\u522b\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1092\" height=\"840\" src=\"https:\/\/luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog3.png\" alt=\"\" class=\"wp-image-431\" srcset=\"https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog3.png 1092w, https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog3-300x231.png 300w, https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog3-768x591.png 768w, https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog3-1024x788.png 1024w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Bagging: \u7528\u4e0d\u540c\u7684\u6a21\u578b\u53bb\u8bd5\u968f\u673a\u9009\u53d6\u7684\u6837\u672c\u5e76\u4e14\u6d4b\u8bd5\uff0c\u5f97\u51fa\u6765\u7684\u7ed3\u679c\u4e00\u822c\u90fd\u662f\u5404\u4e2a\u6a21\u578b\u7684\u8f93\u51fa\u7684\u5e73\u5747\u8f93\u51fa\u3002\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Random Forest\uff1a\u4e00\u901a\u4e71\u7096.jpg\uff0c\u5efa\u4e00\u5806\u4e0d\u540c\u7684\u6a21\u578b\uff0c\u968f\u673a\u5e94\u7528\u5230\u4e0d\u540c\u7684\u6837\u672c\u4e2d\uff08\u8fd9\u6b21\u4e5f\u6ca1\u7528\u3002\u3002\u3002\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Boosting\uff1a\u4e00\u6b65\u4e00\u6b65\u5730\u5efa\u6a21\u3002\u3002\u4e0b\u4e00\u4e2a\u6a21\u578b\u4f1a\u57fa\u4e8e\u4e0a\u4e00\u4e2a\u6a21\u578b\u505a\u6539\u5584\u3002\u3002\u65e0\u8bba\u662fadaBoost\u8fd8\u662fGradient Boost\u5728\u8fd9\u6b21\u4f5c\u4e1a\u4e2d\u4e5f\u662f\u7b97\u6bd4\u8f83\u597d\u7684\u4e86\u3002\u3002\u5c24\u5176\u662fGradient Boost\uff0c\u751a\u81f3\u8fd8\u662f\u4e3b\u529b\u3002\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Stacking\uff1a\u505a\u4e00\u5806\u6a21\u578b\uff0c\u7136\u540e\u518d\u7528\u4e00\u4e2a\u6a21\u578b\u53bb\u8bc4\u5224\u54ea\u4e2a\u597d\u3002\u3002\u6027\u80fd\u8fd8\u884c\uff0c\u7b2c\u4e8c\u9009\u62e9\u3002\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7136\u540e\u8fd9\u6b21assignment\u7684\u4e3b\u529b\uff08\u5176\u4e2d\u4e4b\u4e00\uff09\u5c31\u662fgradient boost trees\u4e86\uff0c\u81ea\u5e26ensemble\u8fd8\u6027\u80fd\u4e0d\u9519\u3002\u3002\u7136\u800c\u867d\u7136\u5df2\u7ecf\u7b97\u6700\u597d\u7684\u4e86\uff0cKappa\u8fd8\u662f\u53ea\u67090.3.\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Loop operators\u8c03\u6574\u53c2\u6570+threshold<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u561b\u3002\u3002\u6ca1\u4ec0\u4e48\u597d\u8bf4\u7684\uff0c\u4e3b\u8981\u90fd\u662f\u9760\u628a\u6a21\u578b\u653e\u8fdbloop parameter\u91cc\u9762\uff0c\u8bbe\u5b9a\u5c1d\u8bd5\u54ea\u4e9b\u53c2\u6570\uff0c\u7136\u540e\u5c31\u62ff\u6700\u597d\u7684\u53c2\u6570\u8fdb\u6a21\u578b\uff0c\u5f53\u7136\u8bd5threshold\u4e5f\u662f\u8fd9\u4e2a\u610f\u601d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7136\u800c\u8fd9\u65f6\u6574\u4e2aassignment\u4e2d\u6700\u957f\u6700\u75db\u82e6\u7684\u8fc7\u7a0b\u3002\u5c24\u5176\u662f\u53bbloop cross-validation\u7684\u53c2\u6570\uff0c\u6709\u591a\u5c11fold\u5c31loop\u591a\u5c11\u6b21\u3002\u3002\u6700\u957f\u8bb0\u5f55\u8dd1\u4e864\u4e2a\u534a\u949f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u80fdloop\u7684\u53c2\u6570\u5176\u5b9e\u5c31\u90a3\u4e48\u51e0\u79cd\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>k-NN\uff1ak<\/li><li>\u5404\u79cddecision trees\uff08\u5305\u62ecGBT\uff09\uff1a\u6811\u7684\u6570\u91cf\uff0c\u6df1\u5ea6<\/li><li>cross-validation\uff1anumber of folds<\/li><li>Threshold\uff1athreshold\u9608\u503c<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u7136\u540e\u64cd\u4f5c\u5927\u6982\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">loop \u6a21\u578b\u8ddfcross-validation\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"746\" height=\"301\" src=\"https:\/\/luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog4.png\" alt=\"\" class=\"wp-image-444\" srcset=\"https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog4.png 746w, https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog4-300x121.png 300w\" sizes=\"auto, (max-width: 706px) 89vw, (max-width: 767px) 82vw, 740px\" \/><figcaption>\uff08\u5916\u9762\u8bb0\u5f97\u52a0log to data\uff09<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">loop threshold\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"479\" height=\"238\" src=\"https:\/\/luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog5.png\" alt=\"\" class=\"wp-image-446\" srcset=\"https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog5.png 479w, https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog5-300x149.png 300w\" sizes=\"auto, (max-width: 479px) 100vw, 479px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u4f55\u8c03\u53c2\u6570\uff1a\uff08GBT\u4e3a\u4f8b\uff09<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"794\" height=\"601\" src=\"https:\/\/luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog6.png\" alt=\"\" class=\"wp-image-448\" srcset=\"https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog6.png 794w, https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog6-300x227.png 300w, https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog6-768x581.png 768w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f97\u51fa\u6765\u7684\u7ed3\u679c\u611f\u89c9\u8fd8\u662f\u53ef\u4ee5\u7684\u3002\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u6539\u7528\u5176\u4ed6\u6a21\u578b\u8bc4\u5224\u6807\u51c6<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f88\u660e\u663e\u5728\u8fd9\u79cd\u4e0d\u5e73\u8861\u7684\u60c5\u51b5\u4e0b\u4f20\u7edf\u7684accuracy\u5df2\u7ecf\u5f88\u96be\u6b63\u786e\u9884\u4f30\u5c0f\u6570\u6d3e\u7684\u53d8\u91cf\u4e86\u3002\u8fd9\u65f6\u5019\u80fd\u7528\u7684\u4e00\u822c\u5c31\u662fKappa\uff0cAUC\/ROC\uff0c\u7edf\u8ba1true positive\u7b49\u56db\u4e2a\u60c5\u51b5\u7b49\u7b49\u3002\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8eKappa\u7684\u8bdd\uff0c\u786e\u5b9e\u662f\u633a\u76f4\u89c2\u7684\u65b9\u6cd5\u3002\u3002\u8d8a\u9ad8\u8d8a\u597d\uff0c\u4e00\u822c0.5\u4ee5\u4e0a\u624d\u53eb\u80fd\u770b\u3002\u3002\u4f46\u5728\u8fd9\u4e2acase\u91cc\u9762\u80fd\u67090.3\u5df2\u7ecf\u4e0d\u9519\u4e86\u3002\u3002\u5509<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8eAUC\u7684\u8bdd\uff0c\u662f\u957f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1212\" height=\"859\" src=\"https:\/\/luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog7.png\" alt=\"\" class=\"wp-image-451\" srcset=\"https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog7.png 1212w, https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog7-300x213.png 300w, https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog7-768x544.png 768w, https:\/\/blog.luke6887.me\/wp-content\/uploads\/2018\/08\/772-a1-lp2-blog7-1024x726.png 1024w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ea2\u7ebf(ROC\u66f2\u7ebf)\u901a\u4fd7\u6765\u8bf4\u5c31\u662f\u663e\u793a\u6a21\u578b\u201c\u9884\u4f30\u5230\u6b63\u786e\u7684\u6b63\u6837\u672c\u7684\u53ef\u80fd\u6027\u201d\uff0c\u4e00\u822c\u7ea6\u5f80\u5de6\u9760\u7ea6\u9661\uff0c\u6027\u80fd\u5c31\u8d8a\u597d\u3002\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5728\u6837\u672c\u53d8\u5f97\u4e0d\u5e73\u8861\u7684\u60c5\u51b5\u4e0b\u4fdd\u6301\u4e00\u6837\u7684\u66f2\u7ebf\uff0c\u6240\u4ee5\u62ff\u6765\u8bc4\u5224\u8fd9\u4e2acase\u91cc\u9762\u7684\u6a21\u578b\u7684\u6027\u80fd\u8fd8\u662f\u4e0d\u9519\u7684\u3002\u8be6\u7ec6\u8fd8\u662f\u770b\u7ef4\u57fa\u5427= =<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-\u5d4c\u5165\u5904\u7406\u7a0b\u5e8f\">\nhttps:\/\/zh.wikipedia.org\/wiki\/ROC%E6%9B%B2%E7%BA%BF\n<\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u8fd8\u6709\u66f4\u591a\u7684\u89e3\u51b3\u65b9\u6cd5\u5417\u3002\u3002\u3002\u3002<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u7136\u6709\u3002\u4e0d\u8fc7Rapidminer\u7684\u529f\u80fd\u8fd8\u662f\u4e0d\u591f\u591a\uff0c\u5176\u5b9e\u8fd8\u662f\u6709\u66f4\u591a\u66f4\u597d\u7684\u65b9\u6cd5\u7684\u3002\u3002\u4f8b\u5982\u7ed9\u6a21\u578b\u52a0cost\uff0c\u7528cost-sensitive\u7684\u7b97\u6cd5\uff0c\u6216\u8005\u8f6c\u6362\u6210\u5f02\u5e38\u68c0\u6d4b\u7684\u95ee\u9898\u3002\u3002\u5148\u8d34\u70b9\u94fe\u63a5\u8bb0\u4e00\u4e0b\u5427= =<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-\u5d4c\u5165\u5904\u7406\u7a0b\u5e8f\">\nhttps:\/\/zh.wikipedia.org\/wiki\/%E5%BC%82%E5%B8%B8%E6%A3%80%E6%B5%8B\n<\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-\u5d4c\u5165\u5904\u7406\u7a0b\u5e8f\">\nhttps:\/\/blog.csdn.net\/l281865263\/article\/details\/46654353\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5148\u8fd9\u6837\u5427\u3002\u3002\u53cd\u6b63\u4ea4\u4e86= =<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u540e\u518d\u6709\u518d\u5199\u3002\u3002\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f88\u660e\u663e\u6700\u8fd1\u4e00\u4e24\u4e2a\u661f\u671f\u90fd\u5fd9\uff0c\u5fd9772\u7684assignment1. \u867d\u7136assignment 1\u7684\u76ee\u7684\u53ea\u662f\u8ba9\u6211\u4eec\u719f\u6089 &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/blog.luke6887.me\/?p=345\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201cMIS772 &#8211; A1 \u53ef\u80fd\u5b58\u5728\u7684\u95ee\u9898\u4e0e\u4e00\u4e9b\u60f3\u6cd5-from discussion board\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-345","post","type-post","status-publish","format-standard","hentry","category-mis772"],"_links":{"self":[{"href":"https:\/\/blog.luke6887.me\/index.php?rest_route=\/wp\/v2\/posts\/345","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.luke6887.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.luke6887.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.luke6887.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.luke6887.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=345"}],"version-history":[{"count":57,"href":"https:\/\/blog.luke6887.me\/index.php?rest_route=\/wp\/v2\/posts\/345\/revisions"}],"predecessor-version":[{"id":463,"href":"https:\/\/blog.luke6887.me\/index.php?rest_route=\/wp\/v2\/posts\/345\/revisions\/463"}],"wp:attachment":[{"href":"https:\/\/blog.luke6887.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.luke6887.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=345"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.luke6887.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}