{"id":836,"date":"2023-07-28T14:34:33","date_gmt":"2023-07-28T14:34:33","guid":{"rendered":"https:\/\/statorials.org\/cn\/python-%e5%9d%87%e6%96%b9%e8%af%af%e5%b7%ae\/"},"modified":"2023-07-28T14:34:33","modified_gmt":"2023-07-28T14:34:33","slug":"python-%e5%9d%87%e6%96%b9%e8%af%af%e5%b7%ae","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/python-%e5%9d%87%e6%96%b9%e8%af%af%e5%b7%ae\/","title":{"rendered":"\u5982\u4f55\u5728 python \u4e2d\u8ba1\u7b97\u5747\u65b9\u8bef\u5dee (mse)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\"><strong>\u5747\u65b9\u8bef\u5dee (MSE)<\/strong>\u662f\u8861\u91cf\u6a21\u578b\u9884\u6d4b\u7cbe\u5ea6\u7684\u5e38\u7528\u65b9\u6cd5\u3002\u8ba1\u7b97\u65b9\u6cd5\u5982\u4e0b\uff1a<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>MSE<\/strong> = (1\/n) * \u03a3(\u5b9e\u9645\u503c \u2013 \u9884\u6d4b\u503c) <sup>2<\/sup><\/span><\/p>\n<p><span style=\"color: #000000;\">\u91d1\u5b50\uff1a<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>\u03a3\u2014\u2014<\/strong>\u4e00\u4e2a\u5947\u7279\u7684\u7b26\u53f7\uff0c\u610f\u601d\u662f\u201c\u548c\u201d<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>n\u2014\u2014<\/strong>\u6837\u672c\u91cf<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>real\u2014\u2014<\/strong>\u6570\u636e\u7684\u5b9e\u9645\u503c<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>\u9884\u6d4b<\/strong>\u2013 \u9884\u6d4b\u6570\u636e\u7684\u503c<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">MSE \u503c\u8d8a\u4f4e\uff0c\u6a21\u578b\u9884\u6d4b\u503c\u5c31\u8d8a\u51c6\u786e\u3002<\/span><\/p>\n<h3><strong><span style=\"color: #000000;\">\u5982\u4f55\u7528 Python \u8ba1\u7b97 MSE<\/span><\/strong><\/h3>\n<p><span style=\"color: #000000;\">\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u51fd\u6570\u6765\u7528 Python \u8ba1\u7b97 MSE\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #107d3f;\">import<\/span> numpy <span style=\"color: #107d3f;\">as<\/span> np\n<span style=\"color: #107d3f;\">\ndef<\/span> mse(actual, pred): \n    actual, pred = np.array(actual), np.array(pred)\n    <span style=\"color: #107d3f;\">return<\/span> np.square(np.subtract(actual,pred)).mean() \n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u7136\u540e\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e2a\u51fd\u6570\u8ba1\u7b97\u4e24\u4e2a\u8868\u7684 MSE\uff1a\u4e00\u4e2a\u5305\u542b\u5b9e\u9645\u6570\u636e\u503c\uff0c\u53e6\u4e00\u4e2a\u5305\u542b\u9884\u6d4b\u6570\u636e\u503c\u3002<\/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\nmse(actual, pred)\n\n17.0<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u8be5\u6a21\u578b\u7684\u5747\u65b9\u8bef\u5dee (MSE) \u4e3a<strong>17.0<\/strong> \u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u5728\u5b9e\u8df5\u4e2d\uff0c<strong>\u5747\u65b9\u6839\u8bef\u5dee\uff08RMSE\uff09<\/strong>\u66f4\u5e38\u7528\u4e8e\u8bc4\u4f30\u6a21\u578b\u7cbe\u5ea6\u3002\u987e\u540d\u601d\u4e49\uff0c\u5b83\u53ea\u662f\u5747\u65b9\u8bef\u5dee\u7684\u5e73\u65b9\u6839\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u7c7b\u4f3c\u7684\u51fd\u6570\u6765\u8ba1\u7b97 RMSE\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #107d3f;\">import<\/span> numpy <span style=\"color: #107d3f;\">as<\/span> np\n<span style=\"color: #107d3f;\">\ndef<\/span> rmse(actual, pred): \n    actual, pred = np.array(actual), np.array(pred)\n    <span style=\"color: #107d3f;\">return<\/span> np.sqrt(np.square(np.subtract(actual,pred)).mean())\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u7136\u540e\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u6b64\u51fd\u6570\u8ba1\u7b97\u4e24\u4e2a\u8868\u7684 RMSE\uff1a\u4e00\u4e2a\u5305\u542b\u5b9e\u9645\u6570\u636e\u503c\uff0c\u53e6\u4e00\u4e2a\u5305\u542b\u9884\u6d4b\u6570\u636e\u503c\u3002<\/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\nrmse(actual, pred)\n\n4.1231<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u8be5\u6a21\u578b\u7684\u5747\u65b9\u6839\u8bef\u5dee (RMSE) \u4e3a<strong>4.1231<\/strong> \u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u5176\u4ed6\u8d44\u6e90<\/strong><\/span><\/h3>\n<p><a href=\"https:\/\/statorials.org\/cn\/mse\u8ba1\u7b97\u5668\/\">\u5747\u65b9\u8bef\u5dee (MSE) \u8ba1\u7b97\u5668<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/excel\u4e2d\u5982\u4f55\u8ba1\u7b97\u5747\u65b9mse\u8bef\u5dee\/\">\u5982\u4f55\u5728 Excel \u4e2d\u8ba1\u7b97\u5747\u65b9\u8bef\u5dee (MSE)<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5747\u65b9\u8bef\u5dee (MSE)\u662f\u8861\u91cf\u6a21\u578b\u9884\u6d4b\u7cbe\u5ea6\u7684\u5e38\u7528\u65b9\u6cd5\u3002\u8ba1\u7b97\u65b9\u6cd5\u5982\u4e0b\uff1a MSE = (1\/n) * \u03a3(\u5b9e\u9645\u503c \u2013  [&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-836","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\u5747\u65b9\u8bef\u5dee (MSE) - Statory<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u5982\u4f55\u5728 Python 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