{"type":"rich","categories":["machine_learning"],"provider_name":"Hatena Blog","version":"1.0","provider_url":"https://hatena.blog","description":"octave\u904a\u3073\u3002 PCA\u3092\u4f7f\u3063\u305f\u7279\u5fb4\u91cf\u306e\u6b21\u5143\u306e\u4f4e\u4e0b\u306b\u3064\u3044\u3066\u3001\u3084\u306f\u308a\u8272\u3005\u5206\u304b\u308a\u306b\u304f\u3044\u306e\u3067\u56f3\u793a\u3002 2D->1D\u304f\u3089\u3044\u3057\u304b\u307e\u3060\u3084\u308a\u65b9\u5206\u304b\u3089\u306a\u3044\u304b\u3089(octave\u3067\u307e\u3060\u3046\u307e\u304f\u5e73\u9762\u3092\u56f3\u793a\u3067\u304d\u306a\u3044...)\u3001\u3057\u3087\u3063\u3071\u3044\u3051\u3069\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u611f\u3058\u3067\u3002 \u7279\u5fb4\u91cf\u30d9\u30af\u30c8\u30eb\u30923\u70b9\u3068\u3063\u3066(X)\u3001\u63cf\u753b(\u9ec4\u8272\u3044\u25cb)\u3002\u624b\u9593\u3092\u7701\u304f\u305f\u3081\u306b\u3001\u4e88\u30813\u70b9\u306e\u5e73\u5747\u304c\u539f\u70b9\u306b\u306a\u308b\u3088\u3046\u306b\u8abf\u7bc0\u6e08\u307f\u3002 \u305d\u3053\u304b\u3089\u4f5c\u3089\u308c\u308b\u5bfe\u79f0\u534a\u6b63\u5b9a\u5024\u306a\u5171\u5206\u6563\u884c\u5217( (1/m) * X' * X )\u3092\u5bfe\u89d2\u5316(svd(Sigma))\u3057\u3066\u3001\u6700\u5927\u306e\u56fa\u6709\u5024\u306b\u5bfe\u5fdc\u3059\u308b\u56fa\u6709\u30d9\u30af\u30c8\u30eb\u3092\u53d6\u5f97(U(:, 1:K))\u3002 \u3053\u306e\u56fa\u6709\u30d9\u30af\u30c8\u30eb\u304c\u5f35\u308b\u8d85\u5e73\u9762(\u3063\u3066\u3082\u3001\u3053\u3053\u3067\u306f\u76f4\u7dda...: y = gra\u2026","author_name":"derwind","url":"https://randommemory.hatenablog.com/entry/2015/09/25/004640","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frandommemory.hatenablog.com%2Fentry%2F2015%2F09%2F25%2F004640\" title=\"\u7279\u5fb4\u91cf\u306e\u6b21\u5143\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u3068\u304b - \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>","author_url":"https://blog.hatena.ne.jp/derwind/","blog_title":"\u3089\u3093\u3060\u3080\u306a\u8a18\u61b6","blog_url":"https://randommemory.hatenablog.com/","image_url":"http://cdn-ak.f.st-hatena.com/images/fotolife/d/derwind/20150925/20150925002815.jpg","published":"2015-09-25 00:46:40","title":"\u7279\u5fb4\u91cf\u306e\u6b21\u5143\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u3068\u304b","width":"100%"}