{"id":5384,"date":"2025-05-31T13:41:55","date_gmt":"2025-06-04T06:14:54","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=5384"},"modified":"2025-06-04T13:41:55","modified_gmt":"2025-06-04T06:14:54","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8typescript%e6%b1%82%e5%8f%96%e6%95%b8%e7%b5%84%e7%9a%84%e5%8d%94%e6%96%b9%e5%b7%ae%e7%9f%a9%e9%99%a3-2","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/typescript\/%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8typescript%e6%b1%82%e5%8f%96%e6%95%b8%e7%b5%84%e7%9a%84%e5%8d%94%e6%96%b9%e5%b7%ae%e7%9f%a9%e9%99%a3-2\/","title":{"rendered":"\u638c\u63e1 TypeScript\uff1a\u4e00\u6b65\u6b65\u6c42\u53d6\u6578\u7d44\u7684\u5354\u65b9\u5dee\u77e9\u9663"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"TypeScript, \u5354\u65b9\u5dee\u77e9\u9663, \u6578\u7d44, Array Covariance Matrix, JavaScript, \u6578\u64da\u5206\u6790\"><\/p>\n<h1>\u638c\u63e1 TypeScript\uff1a\u4e00\u6b65\u6b65\u6c42\u53d6\u6578\u7d44\u7684\u5354\u65b9\u5dee\u77e9\u9663<\/h1>\n<p>\u5728\u6578\u64da\u5206\u6790\u548c\u7d71\u8a08\u5b78\u4e2d\uff0c\u5354\u65b9\u5dee\u77e9\u9663\uff08Covariance Matrix\uff09\u662f\u4e00\u500b\u6975\u70ba\u91cd\u8981\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u6211\u5011\u7406\u89e3\u591a\u500b\u8b8a\u91cf\u4e4b\u9593\u7684\u76f8\u4e92\u95dc\u4fc2\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528 TypeScript \u9019\u4e00\u5f37\u5927\u7684\u7a0b\u5f0f\u8a9e\u8a00\u4f86\u8a08\u7b97\u6578\u7d44\u7684\u5354\u65b9\u5dee\u77e9\u9663\uff0c\u4e26\u63d0\u4f9b\u6700\u65b0\u7684\u5beb\u6cd5\u8207\u793a\u7bc4\u3002<\/p>\n<h2>\u5354\u65b9\u5dee\u77e9\u9663\u662f\u4ec0\u9ebc\uff1f<\/h2>\n<p>\u5354\u65b9\u5dee\u77e9\u9663\u662f\u4e00\u7a2e\u63cf\u8ff0\u591a\u500b\u8b8a\u91cf\u9593\u95dc\u806f\u6027\u7684\u65b9\u9663\u3002\u6bcf\u500b\u5143\u7d20\u4ee3\u8868\u4e86\u5169\u500b\u8b8a\u91cf\u7684\u5354\u65b9\u5dee\uff0c\u9019\u662f\u8861\u91cf\u5b83\u5011\u4e4b\u9593\u7dda\u6027\u95dc\u4fc2\u7684\u7d71\u8a08\u91cf\u3002\u7c21\u55ae\u4f86\u8aaa\uff0c\u5354\u65b9\u5dee\u8d8a\u5927\uff0c\u4ee3\u8868\u5169\u500b\u8b8a\u91cf\u4e4b\u9593\u7684\u95dc\u806f\u6027\u8d8a\u5f37\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5c0d\u65bc\u8b8a\u91cf x \u548c y\uff0c\u5176\u5354\u65b9\u5dee\u7684\u8a08\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre class=\"brush: python\">\ncov(x, y) = (1\/n) * \u03a3((x_i - x_mean) * (y_i - y_mean))\n<\/pre>\n<p>\u5728\u9019\u88e1\uff0cn \u4ee3\u8868\u6a23\u672c\u6578\uff0cx_i \u548c y_i \u5206\u5225\u662f\u7b2c i \u500b\u6a23\u672c\u7684\u503c\uff0c\u800c x_mean \u548c y_mean \u662f\u9019\u4e9b\u6a23\u672c\u7684\u5e73\u5747\u503c\u3002<\/p>\n<p>\u5354\u65b9\u5dee\u77e9\u9663\u7684\u5f62\u5f0f\u70ba n x n\uff0c\u5176\u4e2d n \u662f\u8b8a\u91cf\u7684\u6578\u91cf\u3002\u5047\u8a2d\u6211\u5011\u6709\u4e09\u500b\u8b8a\u91cf x\u3001y \u548c z\uff0c\u5354\u65b9\u5dee\u77e9\u9663\u6703\u986f\u793a\u70ba\uff1a<\/p>\n<pre class=\"brush: python\">\n[\n  [cov(x, x), cov(x, y), cov(x, z)],\n  [cov(y, x), cov(y, y), cov(y, z)],\n  [cov(z, x), cov(z, y), cov(z, z)]\n]\n<\/pre>\n<h2>\u5982\u4f55\u5728 TypeScript \u4e2d\u8a08\u7b97\u6578\u7d44\u7684\u5354\u65b9\u5dee\u77e9\u9663\uff1f<\/h2>\n<p>\u5728 TypeScript \u4e2d\uff0c\u8a08\u7b97\u5354\u65b9\u5dee\u77e9\u9663\u7684\u904e\u7a0b\u975e\u5e38\u7c21\u55ae\u3002\u96d6\u7136 TypeScript \u672c\u8eab\u6c92\u6709\u5167\u5efa\u7684\u5354\u65b9\u5dee\u8a08\u7b97\u51fd\u6578\uff0c\u4f46\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u7de8\u5beb\u4e00\u500b\u81ea\u5b9a\u7fa9\u51fd\u6578\u4f86\u5be6\u73fe\u9019\u4e00\u529f\u80fd\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u7bc4\u5982\u4f55\u8a08\u7b97\u6578\u7d44\u7684\u5354\u65b9\u5dee\u77e9\u9663\u7684\u4ee3\u78bc\uff1a<\/p>\n<pre class=\"brush: python\">\nfunction covarianceMatrix(arr: number[][]): number[][] {\n    const n = arr[0].length;\n    let means = new Array(n).fill(0);\n    let covMatrix = new Array(n).fill(0).map(() => new Array(n).fill(0));\n    \n    \/\/ \u8a08\u7b97\u6bcf\u5217\u7684\u5e73\u5747\u503c\n    for (let i = 0; i < arr.length; i++) {\n        for (let j = 0; j < n; j++) {\n            means[j] += arr[i][j];\n        }\n    }\n    for (let j = 0; j < n; j++) {\n        means[j] \/= arr.length;\n    }\n\n    \/\/ \u8a08\u7b97\u5354\u65b9\u5dee\n    for (let i = 0; i < arr.length; i++) {\n        for (let j = 0; j < n; j++) {\n            for (let k = 0; k < n; k++) {\n                covMatrix[j][k] += (arr[i][j] - means[j]) * (arr[i][k] - means[k]);\n            }\n        }\n    }\n    for (let j = 0; j < n; j++) {\n        for (let k = 0; k < n; k++) {\n            covMatrix[j][k] \/= arr.length - 1; \/\/ \u4f7f\u7528 n-1 \u4f86\u8a08\u7b97\u6a23\u672c\u5354\u65b9\u5dee\n        }\n    }\n\n    return covMatrix;\n}\n\nlet data = [\n  [1, 2, 3],\n  [4, 5, 6],\n  [7, 8, 9]\n];\n\nlet result = covarianceMatrix(data);\nconsole.log(result);\n<\/pre>\n<p>\u901a\u904e\u4ee5\u4e0a\u4ee3\u78bc\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u8a08\u7b97\u51fa\u4e09\u500b\u8b8a\u91cf\u4e4b\u9593\u7684\u5354\u65b9\u5dee\u77e9\u9663\u3002\u9019\u5c0d\u65bc\u5206\u6790\u6578\u64da\u548c\u7406\u89e3\u8b8a\u91cf\u4e4b\u9593\u7684\u95dc\u4fc2\u662f\u975e\u5e38\u6709\u5e6b\u52a9\u7684\u3002<\/p>\n<h2>\u7d50\u8ad6<\/h2>\n<p>\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5011\u5b78\u7fd2\u4e86\u5982\u4f55\u4f7f\u7528 TypeScript \u4f86\u8a08\u7b97\u6578\u7d44\u7684\u5354\u65b9\u5dee\u77e9\u9663\u3002\u9019\u4e0d\u50c5\u63d0\u5347\u4e86\u6211\u5011\u7684\u6578\u64da\u5206\u6790\u6280\u80fd\uff0c\u4e5f\u8b93\u6211\u5011\u80fd\u5920\u66f4\u6df1\u5165\u5730\u4e86\u89e3\u8b8a\u91cf\u4e4b\u9593\u7684\u95dc\u806f\u6027\u3002\u5e0c\u671b\u4f60\u80fd\u5920\u5c07\u9019\u4e9b\u77e5\u8b58\u61c9\u7528\u5230\u5be6\u969b\u7684\u6578\u64da\u5206\u6790\u4e2d\uff0c\u4e26\u767c\u6398\u66f4\u591a\u6709\u8da3\u7684\u898b\u89e3\uff01<\/p>\n<p>---<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528TypeScript\u6c42\u53d6\u6578\u7d44\u7684\u5354\u65b9\u5dee\u77e9\u9663\uff0c\u4e26\u8a73\u7d30\u89e3\u91cb\u5354\u65b9\u5dee\u77e9\u9663\u7684\u6982\u5ff5\u53ca\u5176\u5728\u6578\u64da\u5206\u6790\u4e2d\u7684\u61c9\u7528\u3002\u672c\u6587\u5c07\u63d0\u4f9b\u7c21\u55ae\u6613\u61c2\u7684\u793a\u4f8b\u4ee3\u78bc\uff0c\u4ee5\u4fbf\u8b80\u8005\u80fd\u5920\u66f4\u8f15\u9b06\u5730\u7406\u89e3\u5354\u65b9\u5dee\u77e9\u9663\u7684\u6982\u5ff5\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[187],"tags":[186],"class_list":["post-5384","post","type-post","status-publish","format-standard","hentry","category-typescript","tag-typescript"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-1oQ","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5384","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=5384"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5384\/revisions"}],"predecessor-version":[{"id":5385,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/5384\/revisions\/5385"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=5384"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=5384"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=5384"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}