{"url":"https://randommemory.hatenablog.com/entry/2015/08/16/030100","author_name":"derwind","title":"\u6b63\u898f\u65b9\u7a0b\u5f0f\u3063\u3066\u4f55\u3060\uff1f","height":"190","width":"100%","image_url":null,"provider_url":"https://hatena.blog","description":"normal equation\uff1f\u805e\u3044\u305f\u3053\u3068\u306a\u3044...\u3002 \u6700\u5c0f\u4e8c\u4e57\u6cd5\u3092\u9069\u7528\u3059\u308b\u5834\u9762\u3067\u3001$A \\in \\mathrm{Mat}(n,\\mathbb{R}),\\ b \\in \\mathbb{R}^n$\u3068\u3057\u3066\u30012\u6b21\u65b9\u7a0b\u5f0f \\begin{equation} J(x) = |Ax - b|^2,\\ x \\in \\mathbb{R}^n \\end{equation} \u3092\u6700\u5c0f\u306b\u3059\u308b$x$\u3092\u6c42\u3081\u308b\u65b9\u6cd5\u3089\u3057\u3044\u3002 1\u6b21\u5143\u306a\u3089\u5fae\u5206\u3057\u30660\u3068\u7b49\u3057\u3044\u3068\u7f6e\u3044\u3066\u6975\u5c0f\u5024\u3092\u6c42\u3081\u305f\u3089\u826f\u3044\u3051\u3069\u3001\u884c\u5217\u3060\u304b\u3089\u6c17\u3043\u3064\u3051\u307e\u3057\u3087\u3046\u7684\u306a\u3082\u306e\u3089\u3057\u3044\u3002Linear least squares - Wikipedia\u306b\u5177\u4f53\u7684\u306a\u8a08\u7b97\u304c\u66f8\u3044\u3066\u3042\u3063\u3066\u306a\u308b\u307b\u3069\u2026","published":"2015-08-16 03:01:00","type":"rich","blog_title":"\u3089\u3093\u3060\u3080\u306a\u8a18\u61b6","categories":["machine_learning","math-other","MOOC"],"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%2F08%2F16%2F030100\" title=\"\u6b63\u898f\u65b9\u7a0b\u5f0f\u3063\u3066\u4f55\u3060\uff1f - \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>","version":"1.0","blog_url":"https://randommemory.hatenablog.com/","provider_name":"Hatena Blog"}