{"id":1357,"date":"2023-07-26T18:02:38","date_gmt":"2023-07-26T18:02:38","guid":{"rendered":"https:\/\/statorials.org\/cn\/%e8%a1%a8%e7%a4%ba%e7%bb%9d%e5%af%b9%e9%94%99%e8%af%af-python\/"},"modified":"2023-07-26T18:02:38","modified_gmt":"2023-07-26T18:02:38","slug":"%e8%a1%a8%e7%a4%ba%e7%bb%9d%e5%af%b9%e9%94%99%e8%af%af-python","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/%e8%a1%a8%e7%a4%ba%e7%bb%9d%e5%af%b9%e9%94%99%e8%af%af-python\/","title":{"rendered":"\u5982\u4f55\u7528 python \u8ba1\u7b97\u5e73\u5747\u7edd\u5bf9\u8bef\u5dee"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\u5728\u7edf\u8ba1\u5b66\u4e2d\uff0c<strong>\u5e73\u5747\u7edd\u5bf9\u8bef\u5dee<\/strong>(MAE) \u662f\u8861\u91cf\u7ed9\u5b9a\u6a21\u578b\u51c6\u786e\u6027\u7684\u4e00\u79cd\u65b9\u6cd5\u3002\u8ba1\u7b97\u65b9\u6cd5\u5982\u4e0b\uff1a<\/span><\/p>\n<p> <span style=\"color: #000000;\">MAE = (1\/n) * \u03a3|y <sub>i<\/sub> \u2013 x <sub>i<\/sub> |<\/span><\/p>\n<p><span style=\"color: #000000;\">\u91d1\u5b50\uff1a<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>\u03a3\uff1a<\/strong>\u5e0c\u814a\u7b26\u53f7\uff0c\u610f\u601d\u662f\u201c\u548c\u201d<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>y <sub>i<\/sub> \uff1a<\/strong><sup>\u7b2c i \u4e2a<\/sup>\u89c2\u6d4b\u503c\u7684\u89c2\u6d4b\u503c<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>x <sub>i<\/sub> \uff1a<\/strong><sup>\u7b2c i \u4e2a<\/sup>\u89c2\u6d4b\u503c\u7684\u9884\u6d4b\u503c<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>n\uff1a<\/strong>\u89c2\u5bdf\u603b\u6570<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 Scikit-learn \u7684<a href=\"https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.metrics.mean_absolute_error.html\" target=\"_blank\" rel=\"noopener\">Mean_absolute_error()<\/a>\u51fd\u6570\u8f7b\u677e\u8ba1\u7b97 Python \u4e2d\u7684\u5e73\u5747\u7edd\u5bf9\u8bef\u5dee\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u672c\u6559\u7a0b\u63d0\u4f9b\u4e86\u4f7f\u7528\u6b64\u529f\u80fd\u7684\u5b9e\u9645\u793a\u4f8b\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u793a\u4f8b\uff1a\u5728 Python \u4e2d\u8ba1\u7b97\u5e73\u5747\u7edd\u5bf9\u8bef\u5dee<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u5047\u8bbe\u6211\u4eec\u5728Python\u4e2d\u6709\u4ee5\u4e0b\u5b9e\u9645\u503c\u548c\u9884\u6d4b\u503c\u7684\u6570\u7ec4\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>actual = [12, 13, 14, 15, 15, 22, 27]\npred = [11, 13, 14, 14, 15, 16, 18]\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u4ee3\u7801\u663e\u793a\u4e86\u5982\u4f55\u8ba1\u7b97\u8be5\u6a21\u578b\u7684\u5e73\u5747\u7edd\u5bf9\u8bef\u5dee\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008000;\">from<\/span> sklearn. <span style=\"color: #3366ff;\">metrics<\/span> <span style=\"color: #008000;\">import<\/span> mean_absolute_error <span style=\"color: #008000;\">as<\/span> mae\n\n<span style=\"color: #008080;\">#calculate MAE<\/span>\nmae(actual, pred)\n\n2.4285714285714284\n<\/strong><\/span><\/pre>\n<p><span style=\"color: #000000;\">\u5e73\u5747\u7edd\u5bf9\u8bef\u5dee (MAE) \u7ed3\u679c\u4e3a<strong>2.42857<\/strong> \u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u8fd9\u544a\u8bc9\u6211\u4eec\uff0c\u5b9e\u9645\u6570\u636e\u503c\u4e0e\u6a21\u578b\u9884\u6d4b\u503c\u4e4b\u95f4\u7684\u5e73\u5747\u5dee\u5f02\u4e3a 2.42857\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u6211\u4eec\u53ef\u4ee5\u5c06\u6b64 MAE \u4e0e\u5176\u4ed6\u9884\u6d4b\u6a21\u578b\u83b7\u5f97\u7684 MAE \u8fdb\u884c\u6bd4\u8f83\uff0c\u770b\u770b\u54ea\u4e9b\u6a21\u578b\u8868\u73b0\u6700\u597d\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u7ed9\u5b9a\u6a21\u578b\u7684 MAE \u8d8a\u4f4e\uff0c\u6a21\u578b\u9884\u6d4b\u5b9e\u9645\u503c\u7684\u80fd\u529b\u5c31\u8d8a\u597d\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>\u6ce8\u610f\uff1a<\/strong>\u5b9e\u9645\u503c\u6570\u7ec4\u548c\u9884\u6d4b\u503c\u6570\u7ec4\u7684\u957f\u5ea6\u5fc5\u987b\u76f8\u540c\uff0c\u6b64\u51fd\u6570\u624d\u80fd\u6b63\u5e38\u5de5\u4f5c\u3002<\/span><\/p>\n<h3><strong>\u5176\u4ed6\u8d44\u6e90<\/strong><\/h3>\n<p><a href=\"https:\/\/statorials.org\/cn\/\u87d2\u86c7\u5361\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728Python\u4e2d\u8ba1\u7b97MAPE<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/\u87d2\u86c7\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728Python\u4e2d\u8ba1\u7b97SMAPE<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/python-\u5747\u65b9\u8bef\u5dee\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u7528 Python \u8ba1\u7b97 MSE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u7edf\u8ba1\u5b66\u4e2d\uff0c\u5e73\u5747\u7edd\u5bf9\u8bef\u5dee(MAE) \u662f\u8861\u91cf\u7ed9\u5b9a\u6a21\u578b\u51c6\u786e\u6027\u7684\u4e00\u79cd\u65b9\u6cd5\u3002\u8ba1\u7b97\u65b9\u6cd5\u5982\u4e0b\uff1a MAE = (1\/n) * [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-1357","post","type-post","status-publish","format-standard","hentry","category-11"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5982\u4f55\u5728 Python \u4e2d\u8ba1\u7b97\u5e73\u5747\u7edd\u5bf9\u8bef\u5dee - Statorials<\/title>\n<meta name=\"description\" content=\"\u672c\u6559\u7a0b\u901a\u8fc7\u51e0\u4e2a\u793a\u4f8b\u89e3\u91ca\u4e86\u5982\u4f55\u5728 Python 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