{"id":29397,"date":"2024-10-27T16:18:15","date_gmt":"2024-10-27T16:18:15","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=29397"},"modified":"2024-11-26T06:52:46","modified_gmt":"2024-11-26T06:52:46","slug":"%eb%a8%b8%ec%8b%a0%eb%9f%ac%eb%8b%9d-%eb%b0%8f-%eb%94%a5%eb%9f%ac%eb%8b%9d-%ec%95%8c%ea%b3%a0%eb%a6%ac%ec%a6%98-%ed%8a%b8%eb%a0%88%ec%9d%b4%eb%94%a9-%ed%8a%b8%eb%a0%88%ec%9d%b4%eb%94%a9%ec%9d%84","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/29397\/","title":{"rendered":"\uba38\uc2e0\ub7ec\ub2dd \ubc0f \ub525\ub7ec\ub2dd \uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529, \ud2b8\ub808\uc774\ub529\uc744 \uc704\ud55c PCA"},"content":{"rendered":"

<\/p>\n

\ud604\ub300 \uae08\uc735 \uc2dc\uc7a5\uc740 \ub0a0\ub85c \ubcf5\uc7a1\ud574\uc9c0\uace0 \uc788\uc73c\uba70, \uc804\ud1b5\uc801\uc778 \ud2b8\ub808\uc774\ub529 \ubc29\uc2dd\uc73c\ub85c\ub294 \ud55c\uacc4\uac00 \uc788\uc2b5\ub2c8\ub2e4. \uc774\uc5d0 \ub530\ub77c \uba38\uc2e0\ub7ec\ub2dd\uacfc \ub525\ub7ec\ub2dd\uc744 \ud65c\uc6a9\ud55c \uc790\ub3d9\ub9e4\ub9e4 \uc2dc\uc2a4\ud15c\uc774 \ubd80\uc0c1\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 \uba38\uc2e0\ub7ec\ub2dd \ubc0f \ub525\ub7ec\ub2dd \uc54c\uace0\ub9ac\uc998\uc744 \ud1b5\ud55c \ud2b8\ub808\uc774\ub529 \ubc29\ubc95\ub860\uacfc \uc774\uc640 \ud568\uaed8 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \uc8fc\uc131\ubd84 \ubd84\uc11d(PCA, Principal Component Analysis)\uc758 \uc6d0\ub9ac\ub97c \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n

\uba38\uc2e0\ub7ec\ub2dd \ubc0f \ub525\ub7ec\ub2dd \uac1c\uc694<\/h2>\n

\uba38\uc2e0\ub7ec\ub2dd\uc740 \ub370\uc774\ud130\ub97c \ubd84\uc11d\ud558\uc5ec \ud328\ud134\uc744 \ubc1c\uacac\ud558\uace0 \uc774\ub97c \uae30\ubc18\uc73c\ub85c \uc608\uce21\ud558\ub294 \uae30\uc220\uc785\ub2c8\ub2e4. \ub525\ub7ec\ub2dd\uc740 \uba38\uc2e0\ub7ec\ub2dd\uc758 \ud55c \ubd84\uc57c\ub85c, \uc778\uacf5\uc2e0\uacbd\ub9dd(Artificial Neural Networks)\uc744 \uc774\uc6a9\ud558\uc5ec \ub370\uc774\ud130\uc758 \ubcf5\uc7a1\ud55c \ud328\ud134\uc744 \ud559\uc2b5\ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uae30\uc220\ub4e4\uc740 \uae08\uc735 \ub370\uc774\ud130\uc758 \ubc29\ub300\ud55c \uc591\uc744 \ucc98\ub9ac\ud558\uace0 \uc608\uce21\ud558\ub294 \ub370 \ud2b9\ud788 \uc720\uc6a9\ud569\ub2c8\ub2e4.<\/p>\n

\ud2b8\ub808\uc774\ub529\uc758 \uae30\ubcf8 \uc6d0\ub9ac<\/h3>\n

\ud2b8\ub808\uc774\ub529\uc740 \uc2dc\uc7a5\uc5d0\uc11c\uc758 \uac00\uaca9 \ubcc0\ub3d9\uc131\uc744 \uc774\uc6a9\ud558\uc5ec \uc218\uc775\uc744 \ucc3d\ucd9c\ud558\ub294 \uacfc\uc815\uc785\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \ud2b8\ub808\uc774\ub354\ub294 \uae30\uc220\uc801 \ubd84\uc11d, \uae30\ubcf8\uc801 \ubd84\uc11d \ubc0f \uc5ec\ub7ec \ud234\uc744 \uc0ac\uc6a9\ud558\uc5ec \ub9e4\uc218 \ub610\ub294 \ub9e4\ub3c4 \uacb0\uc815\uc744 \ub0b4\ub9bd\ub2c8\ub2e4.<\/p>\n

\uba38\uc2e0\ub7ec\ub2dd \ubc0f \ub525\ub7ec\ub2dd\uc744 \ud65c\uc6a9\ud55c \ud2b8\ub808\uc774\ub529<\/h2>\n

\uba38\uc2e0\ub7ec\ub2dd\uacfc \ub525\ub7ec\ub2dd\uc744 \ud1b5\ud574 \ud2b8\ub808\uc774\ub529\uc758 \ud6a8\uc728\uc131\uc744 \ub192\uc77c \uc218 \uc788\ub294 \uba87 \uac00\uc9c0 \ubc29\ubc95\uc744 \uc18c\uac1c\ud569\ub2c8\ub2e4.<\/p>\n

1. \ub370\uc774\ud130 \uc804\ucc98\ub9ac<\/h3>\n

\ud2b8\ub808\uc774\ub529 \uc54c\uace0\ub9ac\uc998\uc758 \uc131\ub2a5\uc740 \uc0ac\uc6a9\ub418\ub294 \ub370\uc774\ud130\uc758 \ud488\uc9c8\uc5d0 \ud06c\uac8c \uc758\uc874\ud569\ub2c8\ub2e4. \ub370\uc774\ud130 \uc804\ucc98\ub9ac\ub294 \ub178\uc774\uc988 \uc81c\uac70, \uacb0\uce21\uce58 \ucc98\ub9ac \ubc0f \uc815\uaddc\ud654\uc640 \uac19\uc740 \uacfc\uc815\uc744 \ud3ec\ud568\ud558\uba70, \uc774\ub97c \ud1b5\ud574 \ubaa8\ub378\uc758 \ud559\uc2b5\uc744 \ucd5c\uc801\ud654\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

2. \ud2b9\uc9d5 \uc120\ud0dd(Feature Selection)<\/h3>\n

\uc815\ud655\ud55c \uc608\uce21\uc744 \uc704\ud574\uc11c\ub294 \uc801\uc808\ud55c \ud2b9\uc9d5\uc744 \uc120\ud0dd\ud558\ub294 \uac83\uc774 \uc911\uc694\ud569\ub2c8\ub2e4. \uba38\uc2e0\ub7ec\ub2dd \uc54c\uace0\ub9ac\uc998\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc911\uc694\ud55c \ud2b9\uc9d5\uc744 \ud30c\uc545\ud558\uace0 \uc774\ub97c \uae30\ubc18\uc73c\ub85c \ubaa8\ub378\uc744 \uad6c\ucd95\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

3. \ubaa8\ub378\ub9c1<\/h3>\n

\uba38\uc2e0\ub7ec\ub2dd \ubc0f \ub525\ub7ec\ub2dd \uc54c\uace0\ub9ac\uc998\uc744 \uc0ac\uc6a9\ud558\uc5ec \ubaa8\ub378\uc744 \uad6c\ucd95\ud558\ub294 \uacfc\uc815\uc5d0\uc11c\ub294 \ub2e4\uc591\ud55c \uc54c\uace0\ub9ac\uc998\uc744 \uc2e4\ud5d8\ud574 \ubcf4\uc544\uc57c \ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ub79c\ub364 \ud3ec\ub808\uc2a4\ud2b8(Random Forest), \uc11c\ud3ec\ud2b8 \ubca1\ud130 \uba38\uc2e0(SVM), \uc21c\ud658 \uc2e0\uacbd\ub9dd(RNN) \ub4f1\uc774 \uc788\uc73c\uba70, \uac01 \uc54c\uace0\ub9ac\uc998\uc740 \ud2b9\uc815 \uc0c1\ud669\uc5d0 \ub354 \ud6a8\uacfc\uc801\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

4. \ubc31\ud14c\uc2a4\ud305 \ubc0f \uac80\uc99d<\/h3>\n

\uad6c\ucd95\ub41c \ubaa8\ub378\uc740 \uacfc\uac70 \ub370\uc774\ud130\ub97c \ud1b5\ud574 \ubc31\ud14c\uc2a4\ud305\uc744 \uc2e4\uc2dc\ud558\uc5ec \uc131\ub2a5\uc744 \uac80\uc99d\ud574\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ubaa8\ub378\uc774 \uc2e4\uc81c \uc2dc\uc7a5\uc5d0\uc11c \uc5bc\ub9c8\ub098 \uc798 \uc791\ub3d9\ud558\ub294\uc9c0\ub97c \ud3c9\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

PCA(\uc8fc\uc131\ubd84 \ubd84\uc11d)\uc758 \ud544\uc694\uc131<\/h2>\n

PCA\ub294 \uace0\ucc28\uc6d0 \ub370\uc774\ud130\ub97c \uc800\ucc28\uc6d0\uc73c\ub85c \ucd95\uc18c\ud558\ub294 \uae30\ubc95\uc73c\ub85c, \ud2b9\uc9d5\uc758 \uc218\ub97c \uc904\uc774\uba74\uc11c \ub370\uc774\ud130\uc758 \ubd84\uc0b0\uc744 \ucd5c\ub300\ud654\ud558\ub294 \ubc29\ubc95\uc785\ub2c8\ub2e4. \uc774\ub294 \ubaa8\ub378\uc758 \uc131\ub2a5\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\uace0, \uacfc\uc801\ud569(overfitting) \ubb38\uc81c\ub97c \ud574\uacb0\ud558\ub294 \ub370 \ub3c4\uc6c0\uc744 \uc904 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

PCA\uc758 \uc608\uc2dc<\/h3>\n

\uc608\ub97c \ub4e4\uc5b4, \ud2b9\uc815 \uc8fc\uc2dd\uc5d0 \ub300\ud55c \uc5ec\ub7ec \uac00\uc9c0 \uc9c0\ud45c(\uc608: \uac00\uaca9, \uac70\ub798\ub7c9, \uc774\ub3d9 \ud3c9\uade0 \ub4f1)\uac00 \uc788\uc744 \ub54c, \uc774\ub4e4 \uac04\uc5d0 \uc0c1\uad00\uad00\uacc4\uac00 \uc874\uc7ac\ud558\ub294 \uacbd\uc6b0 PCA\ub97c \ud1b5\ud574 \uac00\uc7a5 \uc911\uc694\ud55c \uba87 \uac00\uc9c0 \uc9c0\ud45c\ub85c \ucd95\uc18c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ub370\uc774\ud130\uc758 \uad6c\uc870\ub97c \ub354 \uc798 \uc774\ud574\ud558\uace0, \ubaa8\ub378\uc758 \ud559\uc2b5 \uc18d\ub3c4\ub97c \uc99d\uac00\uc2dc\ud0ac \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

PCA \uc801\uc6a9 \uacfc\uc815<\/h2>\n

1. \ub370\uc774\ud130 \uc218\uc9d1 \ubc0f \uc804\ucc98\ub9ac<\/h3>\n

\uac00\uc7a5 \uba3c\uc800 \ud544\uc694\ud55c \ub370\uc774\ud130(\uc8fc\uc2dd \uac00\uaca9, \uc9c0\ud45c \ub4f1)\ub97c \uc218\uc9d1\ud558\uace0 \uc804\ucc98\ub9ac\ud569\ub2c8\ub2e4. \uacb0\uce21\uce58\ub97c \uc81c\uac70\ud558\uace0 \uc815\uaddc\ud654\ud558\ub294 \uacfc\uc815\uc774 \ud544\uc694\ud569\ub2c8\ub2e4.<\/p>\n

2. \uacf5\ubd84\uc0b0 \ud589\ub82c \uc0dd\uc131<\/h3>\n

PCA\ub97c \uc801\uc6a9\ud558\uae30 \uc704\ud574 \ub370\uc774\ud130\ub97c \uae30\ubc18\uc73c\ub85c \uacf5\ubd84\uc0b0 \ud589\ub82c\uc744 \uc0dd\uc131\ud569\ub2c8\ub2e4. \uc774\ub294 \ub370\uc774\ud130\uc758 \ubd84\uc0b0\uacfc \uc0c1\uad00\uad00\uacc4\ub97c \ub098\ud0c0\ub0b4\ub294 \ud589\ub82c\uc785\ub2c8\ub2e4.<\/p>\n

3. \uace0\uc720\uac12 \ubd84\ud574(Eigenvalue Decomposition)<\/h3>\n

\uacf5\ubd84\uc0b0 \ud589\ub82c\uc744 \ub300\uc0c1\uc73c\ub85c \uace0\uc720\uac12 \ubd84\ud574\ub97c \uc2e4\uc2dc\ud558\uc5ec \uace0\uc720\uac12\uacfc \uace0\uc720\ubca1\ud130\ub97c \uad6c\ud569\ub2c8\ub2e4. \uc774 \uace0\uc720\ubca1\ud130\ub4e4\uc740 PCA\uc5d0\uc11c \uc0ac\uc6a9\ub420 \uc8fc\uc131\ubd84\uc744 \uacb0\uc815\ud569\ub2c8\ub2e4.<\/p>\n

4. \ucc28\uc6d0 \ucd95\uc18c<\/h3>\n

\uac00\uc7a5 \ud070 \uace0\uc720\uac12\uc5d0 \ud574\ub2f9\ud558\ub294 \uace0\uc720\ubca1\ud130\ub4e4\uc744 \uc774\uc6a9\ud574 \uc6d0\ub798 \ub370\uc774\ud130\ub97c \uc0c8\ub85c\uc6b4 \uc800\ucc28\uc6d0 \uacf5\uac04\uc73c\ub85c \ud22c\uc601\ud568\uc73c\ub85c\uc368 \ucc28\uc6d0\uc744 \ucd95\uc18c\ud569\ub2c8\ub2e4.<\/p>\n

\uacb0\ub860 \ubc0f \ud5a5\ud6c4 \uc804\ub9dd<\/h2>\n

\uba38\uc2e0\ub7ec\ub2dd\uacfc \ub525\ub7ec\ub2dd\uc744 \ud65c\uc6a9\ud55c \ud2b8\ub808\uc774\ub529\uc740 \uc55e\uc73c\ub85c\ub3c4 \uacc4\uc18d \ubc1c\uc804\ud560 \uac83\uc785\ub2c8\ub2e4. \ub2e4\uc591\ud55c \ub370\uc774\ud130\uc640 \uc54c\uace0\ub9ac\uc998\uc758 \uc870\ud569\uc744 \ud1b5\ud574 \ub354 \uc815\uad50\ud558\uace0 \ud6a8\uc728\uc801\uc778 \ud2b8\ub808\uc774\ub529 \uc2dc\uc2a4\ud15c\uc744 \uad6c\ucd95\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. PCA\uc640 \uac19\uc740 \uae30\ubc95\ub4e4\uc740 \uc774\ub7ec\ud55c \uc54c\uace0\ub9ac\uc998\uc758 \uc131\ub2a5\uc744 \ub192\uc774\ub294 \ub370 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud560 \uac83\uc774\uba70, \ud2b8\ub808\uc774\ub354\uc5d0\uac8c \uc720\uc6a9\ud55c \ud234\uc774 \ub420 \uac83\uc785\ub2c8\ub2e4.<\/p>\n

\ub9c8\uc9c0\ub9c9\uc73c\ub85c, \uc774 \ubaa8\ub4e0 \uacfc\uc815\uc740 \uc9c0\uc18d\uc801\uc778 \uc5f0\uad6c\uc640 \uac80\uc99d\uc774 \ud544\uc694\ud569\ub2c8\ub2e4. \uae08\uc735 \uc2dc\uc7a5\uc740 \ubcc0\ub3d9\uc131\uc774 \ud06c\uae30 \ub54c\ubb38\uc5d0, \uacfc\uac70 \ub370\uc774\ud130\ub9cc\uc744 \uae30\ubc18\uc73c\ub85c \ud55c \ubaa8\ub378\uc740 \ubbf8\ub798\uc5d0\ub3c4 \ud56d\uc0c1 \uc131\ub2a5\uc774 \uc88b\uc744 \uc218\ub294 \uc5c6\uc2b5\ub2c8\ub2e4. \ub530\ub77c\uc11c, \ud2b8\ub808\uc774\ub354\ub294 \ud56d\uc0c1 \uc0c8\ub85c\uc6b4 \ub370\uc774\ud130\uc640 \ud2b8\ub80c\ub4dc\ub97c \uc8fc\uc2dc\ud558\uba70, \ubaa8\ub378\uc744 \uc5c5\ub370\uc774\ud2b8\ud558\uace0 \uac1c\uc120\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n

\ucc38\uace0\uc790\ub8cc<\/h2>\n

\ub354 \ub9ce\uc740 \uc815\ubcf4\uc640 \uc790\ub8cc\ub97c \uc6d0\ud558\uc2e0\ub2e4\uba74, \uad00\ub828 \ucc45\uc774\ub098 \ub17c\ubb38\uc744 \ucc38\uace0\ud558\uc2dc\uae30 \ubc14\ub78d\ub2c8\ub2e4. \ub610\ud55c, \ub2e4\uc591\ud55c \uc628\ub77c\uc778 \ucee4\ubba4\ub2c8\ud2f0\uc640 \ud3ec\ub7fc\uc5d0\uc11c \ub2e4\ub978 \ud2b8\ub808\uc774\ub354\uc640\uc758 \uacbd\ud5d8\uc744 \ub098\ub204\ub294 \uac83\ub3c4 \ud070 \ub3c4\uc6c0\uc774 \ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"

\ud604\ub300 \uae08\uc735 \uc2dc\uc7a5\uc740 \ub0a0\ub85c \ubcf5\uc7a1\ud574\uc9c0\uace0 \uc788\uc73c\uba70, \uc804\ud1b5\uc801\uc778 \ud2b8\ub808\uc774\ub529 \ubc29\uc2dd\uc73c\ub85c\ub294 \ud55c\uacc4\uac00 \uc788\uc2b5\ub2c8\ub2e4. \uc774\uc5d0 \ub530\ub77c \uba38\uc2e0\ub7ec\ub2dd\uacfc \ub525\ub7ec\ub2dd\uc744 \ud65c\uc6a9\ud55c \uc790\ub3d9\ub9e4\ub9e4 \uc2dc\uc2a4\ud15c\uc774 \ubd80\uc0c1\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 \uba38\uc2e0\ub7ec\ub2dd \ubc0f \ub525\ub7ec\ub2dd \uc54c\uace0\ub9ac\uc998\uc744 \ud1b5\ud55c \ud2b8\ub808\uc774\ub529 \ubc29\ubc95\ub860\uacfc \uc774\uc640 \ud568\uaed8 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \uc8fc\uc131\ubd84 \ubd84\uc11d(PCA, Principal Component Analysis)\uc758 \uc6d0\ub9ac\ub97c \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uba38\uc2e0\ub7ec\ub2dd \ubc0f \ub525\ub7ec\ub2dd \uac1c\uc694 \uba38\uc2e0\ub7ec\ub2dd\uc740 \ub370\uc774\ud130\ub97c \ubd84\uc11d\ud558\uc5ec \ud328\ud134\uc744 \ubc1c\uacac\ud558\uace0 \uc774\ub97c \uae30\ubc18\uc73c\ub85c \uc608\uce21\ud558\ub294 \uae30\uc220\uc785\ub2c8\ub2e4. \ub525\ub7ec\ub2dd\uc740 … \ub354 \ubcf4\uae30 “\uba38\uc2e0\ub7ec\ub2dd \ubc0f \ub525\ub7ec\ub2dd \uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529, \ud2b8\ub808\uc774\ub529\uc744 \uc704\ud55c PCA”<\/span><\/a><\/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":""},"categories":[29],"tags":[],"class_list":["post-29397","post","type-post","status-publish","format-standard","hentry","category-29"],"yoast_head":"\n\uba38\uc2e0\ub7ec\ub2dd \ubc0f \ub525\ub7ec\ub2dd \uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529, \ud2b8\ub808\uc774\ub529\uc744 \uc704\ud55c PCA - 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