{"id":27165,"date":"2026-01-02T09:00:48","date_gmt":"2026-01-02T00:00:48","guid":{"rendered":"https:\/\/blog.agentsoft.co.kr\/index.php\/2026\/01\/02\/27165\/"},"modified":"2026-01-02T09:00:48","modified_gmt":"2026-01-02T00:00:48","slug":"pca-svd","status":"publish","type":"post","link":"https:\/\/blog.agentsoft.co.kr\/index.php\/2026\/01\/02\/27165\/","title":{"rendered":"PCA &amp; SVD"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/image4.happycampus.com\/Production\/thumb212\/2024\/04\/06\/data29662243-0001.jpg\"><img decoding=\"async\" src=\"https:\/\/image4.happycampus.com\/Production\/thumb212\/2024\/04\/06\/data29662243-0002.jpg\"><\/p>\n<p><strong>\ubaa9\ucc28<\/strong><\/p>\n<p>PCA (\uc8fc\uc131\ubd84 \ubd84\uc11d)<br \/>\nSVD (\ud2b9\uc774\uac12 \ubd84\ud574)<br \/>\nRelationship between PCA and SVD<\/p>\n<p><strong>\ubcf8\ubb38\ub0b4\uc6a9<\/strong><\/p>\n<p>PCA\ub294 \ub370\uc774\ud130\uc758 \ubd84\uc0b0(variance)\uc744 \ucd5c\ub300\ud55c \ubcf4\uc874\ud558\uba74\uc11c \uc11c\ub85c \uc9c1\uad50\ud558\ub294 \uc0c8 \uae30\uc800(\ucd95)\ub97c \ucc3e\uc544, \uace0\ucc28\uc6d0 \uacf5\uac04\uc758 \ud45c\ubcf8\ub4e4\uc744 \uc120\ud615 \uc5f0\uad00\uc131\uc774 \uc5c6\ub294 \uc800\ucc28\uc6d0 \uacf5\uac04\uc73c\ub85c \ubcc0\ud658\ud558\ub294 \uae30\ubc95\uc774\ub2e4. \uc774\ub97c \uadf8\ub9bc\uc73c\ub85c \ub098\ud0c0\ub0b4\uba74 \uc544\ub798\uc640 \uac19\ub2e4. 3\ucc28\uc6d0 \uacf5\uac04\uc5d0 \uc788\ub294 \ub370\uc774\ud130\ub4e4\uc774 \uc11c\ub85c \uc218\uc9c1\uc778 \ub450 \uac1c\uc758 \uc8fc\uc131\ubd84(PC1, PC2)\uc744 \uc0c8\ub85c\uc6b4 \uae30\uc800\ub85c, \uc120\ud615\ubcc0\ud658\ub41c \uac83\uc744 \ud655\uc778\ud560 \uc218 \uc788\ub2e4. \ub370\uc774\ud130\uc758 \ubd84\uc0b0\uc744 \ucd5c\ub300\ub85c\ud558\ub294 \uc0c8\ub85c\uc6b4 \uae30\uc800\ub97c \ucc3e\uae30 \uc704\ud574\uc11c\ub294 \ub370\uc774\ud130 \ud589\ub82c A\uc758 \uacf5\ubd84\uc0b0 \ud589\ub82c\uc744 \uad6c\ud574\uc57c \ud55c\ub2e4. \ub370\uc774\ud130\uac00 \uac01 \ubcc0\uc218\ubcc4\ub85c \ud3c9\uade0\uc774 0\uc73c\ub85c \ub9de\ucdb0\uc838 \uc788\uc744 \ub54c(pre-centering), \uacf5\ubd84\uc0b0 \ud589\ub82c\uc740 \uc544\ub798\uc640 \uac19\ub2e4.<br \/>\n PCA\uc758 \uc0c8\ub85c\uc6b4 \ucd95\uc744 \ucc3e\uae30 \uc704\ud574\uc11c\ub294 \uc704 \uacf5\ubd84\uc0b0\ud589\ub82c\uc744 \uc544\ub798\ucc98\ub7fc \uace0\uc720\ubd84\ud574(Eigendecomposition)\ub97c \uc218\ud589\ud574\uc57c\ud55c\ub2e4.<\/p>\n<p>\ucd9c\ucc98 : <a href=\"https:\/\/www.happycampus.com\/report-doc\/29662243\/\" target=\"_blank\">\ud574\ud53c\ucea0\ud37c\uc2a4<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ubaa9\ucc28 PCA (\uc8fc\uc131\ubd84 \ubd84\uc11d) SVD (\ud2b9\uc774\uac12 \ubd84\ud574) Relationship between PCA and SVD \ubcf8\ubb38\ub0b4\uc6a9 PCA\ub294 \ub370\uc774\ud130\uc758 \ubd84\uc0b0(variance)\uc744 \ucd5c\ub300\ud55c \ubcf4\uc874\ud558\uba74\uc11c \uc11c\ub85c \uc9c1\uad50\ud558\ub294 \uc0c8 \uae30\uc800(\ucd95)\ub97c \ucc3e\uc544, \uace0\ucc28\uc6d0 \uacf5\uac04\uc758 \ud45c\ubcf8\ub4e4\uc744 \uc120\ud615 \uc5f0\uad00\uc131\uc774 \uc5c6\ub294 \uc800\ucc28\uc6d0 \uacf5\uac04\uc73c\ub85c \ubcc0\ud658\ud558\ub294 \uae30\ubc95\uc774\ub2e4. \uc774\ub97c \uadf8\ub9bc\uc73c\ub85c \ub098\ud0c0\ub0b4\uba74 \uc544\ub798\uc640 \uac19\ub2e4. 3\ucc28\uc6d0 \uacf5\uac04\uc5d0 \uc788\ub294 \ub370\uc774\ud130\ub4e4\uc774 \uc11c\ub85c \uc218\uc9c1\uc778 \ub450 \uac1c\uc758 \uc8fc\uc131\ubd84(PC1, PC2)\uc744 \uc0c8\ub85c\uc6b4 \uae30\uc800\ub85c, \uc120\ud615\ubcc0\ud658\ub41c \uac83\uc744 \ud655\uc778\ud560 \uc218 \uc788\ub2e4. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[33916,13267,33920,33921],"class_list":["post-27165","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-kernel-pca","tag-nsvd","tag-33920","tag-33921"],"_links":{"self":[{"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/posts\/27165","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/comments?post=27165"}],"version-history":[{"count":0,"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/posts\/27165\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/media?parent=27165"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/categories?post=27165"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.agentsoft.co.kr\/index.php\/wp-json\/wp\/v2\/tags?post=27165"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}