{"categories":["machine_learning"],"blog_title":"\u3089\u3093\u3060\u3080\u306a\u8a18\u61b6","height":"190","url":"https://randommemory.hatenablog.com/entry/2015/09/27/050506","author_name":"derwind","description":"\u7279\u5fb4\u91cf\u306e\u6b21\u5143\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u3068\u304b(2) - \u3089\u3093\u3060\u3080\u306a\u8a18\u61b6\u3067\u5927\u5206\u8996\u899a\u7684\u306a\u96f0\u56f2\u6c17\u3092\u3064\u304b\u3093\u3060\u306e\u3067\u3001\u5f8c\u306f\u30ed\u30b8\u30c3\u30af\u3092\u8ffd\u3044\u304b\u3051\u305f\u3044\u3002$(x_1,\\ \\cdots,\\ x_m),\\ x_n \\in \\mathbb{R}^d,\\ 1 \\le n \\le m $\u3092\u7279\u5fb4\u91cf\u306e\u30c7\u30fc\u30bf\u3068\u3057\u3001$\\frac{1}{m}\\sum_{n = 1}^m x_n = 0$\u3068\u3059\u308b\u3002 $\\Sigma = \\frac{1}{m}\\sum_{n = 1}^m x_n x_n^T$\u3092\u5171\u5206\u6563\u884c\u5217\u3068\u3059\u308b\u3002\u3053\u308c\u306f\u5bfe\u79f0\u534a\u6b63\u5b9a\u5024\u884c\u5217\u306b\u306a\u3063\u3066\u3044\u308b\u3002 \u3088\u3063\u3066\u3001\u5bfe\u89d2\u5316\u3092\u8003\u3048\u308b\u3068\u76f4\u4ea4\u884c\u5217$V = (e_1,\\ \\cdots,\\ e_d)$\u3092\u7528\u3044\u3066\u3001$\\Sigm\u2026","author_url":"https://blog.hatena.ne.jp/derwind/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frandommemory.hatenablog.com%2Fentry%2F2015%2F09%2F27%2F050506\" title=\"\u7279\u5fb4\u91cf\u306e\u6b21\u5143\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u3068\u304b(3) - \u3089\u3093\u3060\u3080\u306a\u8a18\u61b6\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":null,"provider_name":"Hatena Blog","type":"rich","title":"\u7279\u5fb4\u91cf\u306e\u6b21\u5143\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u3068\u304b(3)","provider_url":"https://hatena.blog","width":"100%","published":"2015-09-27 05:05:06","blog_url":"https://randommemory.hatenablog.com/","version":"1.0"}