{"id":6792,"date":"2024-03-10T22:21:11","date_gmt":"2024-03-10T13:21:11","guid":{"rendered":"https:\/\/now0930.pe.kr\/wordpress\/?p=6792"},"modified":"2026-10-04T09:58:26","modified_gmt":"2026-10-04T00:58:26","slug":"least-square","status":"publish","type":"post","link":"https:\/\/now0930.pe.kr\/wordpress\/least-square\/","title":{"rendered":"Least Square"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\ub2e4\uc74c\uacfc \uac19\uc774 \uc774\uc0b0(Discrete)\uc2dc\uc2a4\ud15c\uc5d0 \ub300\ud55c \ubaa8\ub378\ub9c1 \ud30c\ub77c\uba54\ud130\ub97c \ucd94\uc815\ud558\uace0\uc790 \ud55c\ub2e4. LS(Least Square: \ucd94\uc815\uce58 \uc624\ucc28 \uc790\uc2b9 \ud569)\ubc29\uc2dd\uc744 \uc774\uc6a9\ud560 \ub54c t=4sec \uc21c\uac04\uc758 a\uac12\uc758 \ucd94\uc815\uce58\ub97c \uad6c\ud558\uc2dc\uc624.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1406\" height=\"191\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-9.png\" alt=\"\" class=\"wp-image-6793\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-9.png 1406w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-9-768x104.png 768w\" sizes=\"auto, (max-width: 1406px) 100vw, 1406px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1042\" height=\"1280\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-38.png\" alt=\"\" class=\"wp-image-7835\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-38.png 1042w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-38-768x943.png 768w\" sizes=\"auto, (max-width: 1042px) 100vw, 1042px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"382\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-39.png\" alt=\"\" class=\"wp-image-7836\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-39.png 1280w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-39-768x229.png 768w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"936\" height=\"1280\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/\uc81c\ubaa9-\uc5c6\uc74c-31.jpg\" alt=\"\" class=\"wp-image-6797\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/\uc81c\ubaa9-\uc5c6\uc74c-31.jpg 936w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/\uc81c\ubaa9-\uc5c6\uc74c-31-768x1050.jpg 768w\" sizes=\"auto, (max-width: 936px) 100vw, 936px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"936\" height=\"1280\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/\uc81c\ubaa9-\uc5c6\uc74c-1-11.jpg\" alt=\"\" class=\"wp-image-6798\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/\uc81c\ubaa9-\uc5c6\uc74c-1-11.jpg 936w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/\uc81c\ubaa9-\uc5c6\uc74c-1-11-768x1050.jpg 768w\" sizes=\"auto, (max-width: 936px) 100vw, 936px\" \/><\/figure>\n\n\n\n\n<!-- iframe plugin v.6.0 wordpress.org\/plugins\/iframe\/ -->\n<iframe loading=\"lazy\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/121\ud68c_2\uad50\uc2dc_5\ubc88.html\" width=\"600\" height=\"600\" scrolling=\"yes\" class=\"iframe-class\" frameborder=\"0\"><\/iframe>\n\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/04\/least-square.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"least-square\uc758 \uc0bd\uc785.\"><\/object><a id=\"wp-block-file--media-794d6d98-a47c-4a28-af7c-454c8ada11d8\" href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/04\/least-square.pdf\">least-square<\/a><a href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/04\/least-square.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-794d6d98-a47c-4a28-af7c-454c8ada11d8\">\ub2e4\uc6b4\ub85c\ub4dc<\/a><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/darkpgmr.tistory.com\/56\">https:\/\/darkpgmr.tistory.com\/56<\/a><\/p>\n\n\n\n&#8220;`html\n<div class=\"chapter19-wide\">\n\n  <h1>Least Square<\/h1>\n\n  <div class=\"subtitle\">\n    Least Square \u00b7 \ucd5c\uc18c\uc790\uc2b9\ubc95 \u00b7 Parameter Estimation \u00b7 Linear Regression \u00b7 Normal Equation\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>1. \ubb38\uc81c<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ub2e4\uc74c\uacfc \uac19\uc740 \uc774\uc0b0 \uc2dc\uc2a4\ud15c\uc5d0\uc11c\n      Least Square \ubc29\ubc95\uc744 \uc774\uc6a9\ud558\uc5ec\n      \ubaa8\ub378\ub9c1 Parameter\ub97c \ucd94\uc815\ud55c\ub2e4.\n    <\/p>\n\n    <pre>\n      u(t) \u2500\u2500\u2500\u2500\u2500\u25ba [  a  ] \u2500\u2500\u2500\u2500\u2500\u25ba y(t)\n    <\/pre>\n\n    <div class=\"table-wrap\">\n\n      <table>\n\n        <thead>\n          <tr>\n            <th>t(sec)<\/th>\n            <th>0<\/th>\n            <th>1<\/th>\n            <th>2<\/th>\n            <th>3<\/th>\n            <th>4<\/th>\n          <\/tr>\n        <\/thead>\n\n        <tbody>\n\n          <tr>\n            <td><strong>u(t)<\/strong><\/td>\n            <td>3<\/td>\n            <td>2<\/td>\n            <td>1<\/td>\n            <td>2<\/td>\n            <td>3<\/td>\n          <\/tr>\n\n          <tr>\n            <td><strong>y(t)<\/strong><\/td>\n            <td>4<\/td>\n            <td>3<\/td>\n            <td>3<\/td>\n            <td>4<\/td>\n            <td>5<\/td>\n          <\/tr>\n\n        <\/tbody>\n\n      <\/table>\n\n    <\/div>\n\n    <p>\n      \ud544\uae30\uc5d0\uc11c\ub294\n      t = 4 sec\uae4c\uc9c0\uc758 \ub370\uc774\ud130\ub97c \uc774\uc6a9\ud558\uc5ec\n      \ubaa8\ub378 Parameter\ub97c \uad6c\ud55c\ub2e4.\n    <\/p>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>2. Least Square<\/h2>\n\n  <div class=\"card\">\n\n    <div class=\"formula\">\n      Least Square\n      =\n      \ucd94\uc815\uce58 \uc624\ucc28 \uc790\uc2b9\uc758 \ud569\uc744 \ucd5c\uc18c\ud654\n    <\/div>\n\n    <p>\n      \uc5ec\ub7ec \uac1c\uc758 \ub370\uc774\ud130\uac00 \uc788\uc744 \ub54c\n      \ubaa8\ub4e0 \uc810\uc744 \uc815\ud655\ud788 \ud1b5\uacfc\ud558\ub294 \uc2dd\uc774 \uc544\ub2c8\ub77c,\n      \uc804\uccb4 \uc624\ucc28\uc758 \uc81c\uacf1\ud569\uc774 \uac00\uc7a5 \uc791\uc544\uc9c0\ub294\n      \ubaa8\ub378\uc744 \uad6c\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"memory\">\n      <strong>\n        \ub370\uc774\ud130\uc640 \ucd94\uc815\ubaa8\ub378 \uc0ac\uc774\uc758 \uc624\ucc28\ub97c \uc81c\uacf1\ud558\uc5ec \ubaa8\ub450 \ub354\ud558\uace0,\n        \uadf8 \uac12\uc774 \ucd5c\uc18c\uac00 \ub418\ub294 Parameter\ub97c \ucc3e\ub294\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>3. \uc9c1\uc120 \ubaa8\ub378 \uac00\uc815<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ud544\uae30\uc5d0\uc11c\ub294 \ub370\uc774\ud130\uac00\n      \uc9c1\uc120 \ud615\ud0dc\ub85c \ubd84\ud3ec\ud55c\ub2e4\uace0 \uac00\uc815\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      \u0177<sub>i<\/sub>\n      =\n      A + Bx<sub>i<\/sub>\n    <\/div>\n\n    <p>\n      \ub610\ub294 \uc608\uc81c \ud480\uc774\uc5d0\uc11c\ub294\n      \ub2e4\uc74c\uacfc \uac19\uc774 \ud45c\uae30\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      y\n      =\n      ax + b\n    <\/div>\n\n    <p>\n      \uc5ec\uae30\uc11c \uad6c\ud574\uc57c \ud560 \uac12\uc740\n      \uc9c1\uc120\uc758 \uae30\uc6b8\uae30\uc640 \uc808\ud3b8\uc774\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      Parameter\n      =\n      a, b\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>4. \uac01 \ub370\uc774\ud130\uc758 \ucd94\uc815\uc624\ucc28<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uc2e4\uc81c \uce21\uc815\uac12\uacfc\n      \uc9c1\uc120\uc73c\ub85c \ucd94\uc815\ud55c \uac12\uc758 \ucc28\uc774\ub97c \uc624\ucc28\ub85c \ub454\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      e<sub>i<\/sub>\n      =\n      y<sub>i<\/sub> &#8211; \u0177<sub>i<\/sub>\n    <\/div>\n\n    <div class=\"formula\">\n      e<sub>i<\/sub>\n      =\n      y<sub>i<\/sub> &#8211; A &#8211; Bx<sub>i<\/sub>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>5. \uc624\ucc28 \uc81c\uacf1\ud569<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      Least Square\uc5d0\uc11c\ub294\n      \uac01 \uc624\ucc28\ub97c \uc81c\uacf1\ud558\uc5ec \ud569\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      Error\n      =\n      \u03a3\n      (\n      y<sub>i<\/sub> &#8211; \u0177<sub>i<\/sub>\n      )\u00b2\n    <\/div>\n\n    <div class=\"formula\">\n      \u03c7\u00b2\n      =\n      \u03a3\n      {\n      (\n      y<sub>i<\/sub> &#8211; A &#8211; Bx<sub>i<\/sub>\n      )\u00b2\n      \/\n      \u03c3\u00b2\n      }\n    <\/div>\n\n    <p>\n      \ud544\uae30\uc5d0\uc11c\ub294 \uc774 \uac12\uc774 \ucd5c\uc18c\uac00 \ub418\ub3c4\ub85d\n      A\uc640 B\ub97c \uacb0\uc815\ud55c\ub2e4.\n    <\/p>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>6. \ucd5c\uc18c\uc870\uac74<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uc624\ucc28\uc81c\uacf1\ud569\uc744\n      \uac01 Parameter\uc5d0 \ub300\ud574 \ud3b8\ubbf8\ubd84\ud558\uace0\n      \uacb0\uacfc\ub97c 0\uc73c\ub85c \ub454\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      \u2202\u03c7\u00b2 \/ \u2202A\n      =\n      0\n    <\/div>\n\n    <div class=\"formula\">\n      \u2202\u03c7\u00b2 \/ \u2202B\n      =\n      0\n    <\/div>\n\n    <div class=\"memory\">\n      <strong>\n        Error Function\uc758 \uae30\uc6b8\uae30\uac00 0\uc774 \ub418\ub294 \uc9c0\uc810\uc5d0\uc11c\n        Least Square \ud574\ub97c \uad6c\ud55c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>7. A\uc5d0 \ub300\ud55c \ud3b8\ubbf8\ubd84<\/h2>\n\n  <div class=\"card\">\n\n    <div class=\"formula\">\n      \u2202 \/ \u2202A\n      \u03a3\n      {\n      (\n      y<sub>i<\/sub> &#8211; A &#8211; Bx<sub>i<\/sub>\n      )\u00b2\n      \/\n      \u03c3\u00b2\n      }\n      =\n      0\n    <\/div>\n\n    <p>\n      \uc815\ub9ac\ud558\uba74 \ud544\uae30\uc758 \uccab \ubc88\uc9f8 \uc2dd\uc740\n      \ub2e4\uc74c\uacfc \uac19\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      \u03a3y<sub>i<\/sub>\n      =\n      AN\n      +\n      B\u03a3x<sub>i<\/sub>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>8. B\uc5d0 \ub300\ud55c \ud3b8\ubbf8\ubd84<\/h2>\n\n  <div class=\"card\">\n\n    <div class=\"formula\">\n      \u2202\u03c7\u00b2 \/ \u2202B\n      =\n      0\n    <\/div>\n\n    <p>\n      \ud544\uae30\uc5d0\uc11c\ub294 \ub2e4\uc74c \uc2dd\uc73c\ub85c \uc815\ub9ac\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      \u03a3x<sub>i<\/sub>y<sub>i<\/sub>\n      =\n      A\u03a3x<sub>i<\/sub>\n      +\n      B\u03a3x<sub>i<\/sub>\u00b2\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>9. \uc815\uc0c1\ubc29\uc815\uc2dd<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ub450 \uc2dd\uc744 \ub3d9\uc2dc\uc5d0 \ud480\uba74\n      A\uc640 B\ub97c \uad6c\ud560 \uc218 \uc788\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      \u03a3y<sub>i<\/sub>\n      =\n      AN\n      +\n      B\u03a3x<sub>i<\/sub>\n    <\/div>\n\n    <div class=\"formula\">\n      \u03a3x<sub>i<\/sub>y<sub>i<\/sub>\n      =\n      A\u03a3x<sub>i<\/sub>\n      +\n      B\u03a3x<sub>i<\/sub>\u00b2\n    <\/div>\n\n    <div class=\"memory\">\n      <strong>\n        \ud544\uae30\uc5d0\uc11c\ub294 \u03a3x\u1d62, \u03a3y\u1d62, \u03a3x\u1d62y\u1d62, \u03a3x\u1d62\u00b2 \uac12\uc744\n        \uc2e4\uc81c \ub370\uc774\ud130\uc5d0\uc11c \uacc4\uc0b0\ud558\uc5ec\n        \ub450 \uc5f0\ub9bd\ubc29\uc815\uc2dd\uc73c\ub85c A\uc640 B\ub97c \uad6c\ud55c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>10. \ud589\ub82c \ud615\ud0dc<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uc608\uc81c \ud480\uc774\uc5d0\uc11c\ub294 \uc9c1\uc120\uc2dd\n      y = ax + b\ub97c \ud589\ub82c\ub85c \ud45c\ud604\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      AX = B\n    <\/div>\n\n    <pre>\n      \u250c x1  1 \u2510\n      \u2502 x2  1 \u2502\n      \u2502 x3  1 \u2502   \u250c a \u2510   \u250c y1 \u2510\n      \u2502 x4  1 \u2502 \u00d7 \u2502 b \u2502 = \u2502 y2 \u2502\n      \u2502 x5  1 \u2502   \u2514   \u2518   \u2502 y3 \u2502\n      \u2514       \u2518           \u2502 y4 \u2502\n                          \u2514 y5 \u2518\n    <\/pre>\n\n    <div class=\"formula\">\n      X\n      =\n      [ a&nbsp;&nbsp;b ]\u1d40\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>11. \uc608\uc81c \ub370\uc774\ud130<\/h2>\n\n  <div class=\"card\">\n\n    <div class=\"formula\">\n      x\n      =\n      3, 2, 1, 2, 3\n    <\/div>\n\n    <div class=\"formula\">\n      y\n      =\n      4, 3, 3, 4, 5\n    <\/div>\n\n    <p>\n      \ub370\uc774\ud130 \uc218\ub294 5\uac1c\uc774\ub2e4.\n    <\/p>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>12. Least Square \uacc4\uc0b0 \uacb0\uacfc<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ud544\uae30\uc5d0\uc11c\ub294 Least Square \uacc4\uc0b0 \ud6c4\n      \ub2e4\uc74c\uc758 2\u00d72 \uc5f0\ub9bd\ubc29\uc815\uc2dd\uc73c\ub85c \uc815\ub9ac\ud55c\ub2e4.\n    <\/p>\n\n    <pre>\n      \u250c 2  1 \u2510 \u250c a \u2510   \u250c 4 \u2510\n      \u2502      \u2502 \u2502   \u2502 = \u2502   \u2502\n      \u2514 3  1 \u2518 \u2514 b \u2518   \u2514 5 \u2518\n    <\/pre>\n\n    <div class=\"formula\">\n      AX = B\n    <\/div>\n\n    <div class=\"formula\">\n      X = A\u207b\u00b9B\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>13. \uc5ed\ud589\ub82c \uacc4\uc0b0<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ud544\uae30\uc5d0 \uc801\ud78c \uc5ed\ud589\ub82c \uacc4\uc0b0\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      A\u207b\u00b9\n      =\n      1 \/ (2 &#8211; 3)\n      \u00d7\n      [\n      1&nbsp;&nbsp;-1\n      ;\n      -3&nbsp;&nbsp;2\n      ]\n    <\/div>\n\n    <div class=\"formula\">\n      A\u207b\u00b9\n      =\n      [\n      -1&nbsp;&nbsp;1\n      ;\n      3&nbsp;&nbsp;-2\n      ]\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>14. \ucd5c\uc885 Parameter<\/h2>\n\n  <div class=\"card\">\n\n    <div class=\"formula\">\n      X\n      =\n      A\u207b\u00b9B\n    <\/div>\n\n    <div class=\"formula\">\n      [\n      a\n      ;\n      b\n      ]\n      =\n      [\n      -1&nbsp;&nbsp;1\n      ;\n      3&nbsp;&nbsp;-2\n      ]\n      [\n      4\n      ;\n      5\n      ]\n    <\/div>\n\n    <div class=\"formula\">\n      [\n      a\n      ;\n      b\n      ]\n      =\n      [\n      1\n      ;\n      2\n      ]\n    <\/div>\n\n    <div class=\"formula\">\n      a = 1\n    <\/div>\n\n    <div class=\"formula\">\n      b = 2\n    <\/div>\n\n    <div class=\"memory\">\n      <strong>\n        \ud544\uae30\uc758 \ucd5c\uc885 \uacb0\uacfc:\n        a = 1, b = 2\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>15. \ucd94\uc815 \ubaa8\ub378<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ub530\ub77c\uc11c \ud544\uae30\uc5d0\uc11c \uc5bb\uc740\n      Least Square \uc9c1\uc120 \ubaa8\ub378\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      \u0177 = x + 2\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>16. \uacc4\uc0b0 \ud750\ub984<\/h2>\n\n  <div class=\"card\">\n\n    <pre>\n      \uce21\uc815 Data\n          \u2502\n          \u25bc\n      \uc9c1\uc120 Model \uac00\uc815\n        y = ax + b\n          \u2502\n          \u25bc\n      \ucd94\uc815\uac12 \uacc4\uc0b0\n        \u0177i = axi + b\n          \u2502\n          \u25bc\n      Error\n        ei = yi - \u0177i\n          \u2502\n          \u25bc\n      Error\u00b2 \ud569\n        \u03a3ei\u00b2\n          \u2502\n          \u25bc\n      a, b\ub85c \ud3b8\ubbf8\ubd84\n          \u2502\n          \u25bc\n      \ucd5c\uc18c\uc870\uac74 = 0\n          \u2502\n          \u25bc\n      \uc5f0\ub9bd\ubc29\uc815\uc2dd\n          \u2502\n          \u25bc\n      Matrix \uacc4\uc0b0\n          \u2502\n          \u25bc\n      a = 1, b = 2\n    <\/pre>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>17. \uc774\ubbf8\uc9c0 OCR \ud575\uc2ec \uc815\ub9ac<\/h2>\n\n  <div class=\"table-wrap\">\n\n    <table>\n\n      <thead>\n        <tr>\n          <th>\ud56d\ubaa9<\/th>\n          <th>\ud544\uae30 \ub0b4\uc6a9<\/th>\n        <\/tr>\n      <\/thead>\n\n      <tbody>\n\n        <tr>\n          <td><strong>Least Square<\/strong><\/td>\n          <td>\ucd94\uc815\uc624\ucc28 \uc81c\uacf1\ud569\uc744 \ucd5c\uc18c\ud654<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\ubaa8\ub378<\/strong><\/td>\n          <td>y = ax + b<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\uc624\ucc28<\/strong><\/td>\n          <td>e\u1d62 = y\u1d62 &#8211; \u0177\u1d62<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\ubaa9\uc801\ud568\uc218<\/strong><\/td>\n          <td>\u03a3(y\u1d62 &#8211; ax\u1d62 &#8211; b)\u00b2 \ucd5c\uc18c<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\ucd5c\uc18c\uc870\uac74<\/strong><\/td>\n          <td>Parameter\uc5d0 \ub300\ud574 \ud3b8\ubbf8\ubd84 = 0<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\ud589\ub82c\ud45c\ud604<\/strong><\/td>\n          <td>AX = B<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\uc608\uc81c \uacb0\uacfc<\/strong><\/td>\n          <td>a = 1, b = 2<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\ucd94\uc815\uc2dd<\/strong><\/td>\n          <td>\u0177 = x + 2<\/td>\n        <\/tr>\n\n      <\/tbody>\n\n    <\/table>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <div class=\"warning\">\n\n    <strong>\n      \uc774 HTML\uc740 \ud398\uc774\uc9c0 \ubcf8\ubb38\uacfc \uc678\ubd80 \ucc38\uace0 PDF\ub97c \uc0ac\uc6a9\ud558\uc9c0 \uc54a\uace0,\n      \uc77c\ubc18 \uc774\ubbf8\uc9c0 5\uc7a5\ub9cc OCR\/\uc2dc\uac01 \ud310\ub3c5\ud558\uc5ec \uc791\uc131\ud588\ub2e4.\n\n      \ud398\uc774\uc9c0\uc758 least-square.pdf\ub294 NeoStudio PDF\uac00 \uc544\ub2c8\ubbc0\ub85c\n      \ud604\uc7ac \ubcc0\ud658 \uae30\uc900\uc5d0 \ub530\ub77c \uc81c\uc678\ud588\ub2e4.\n\n      \uccab \ubc88\uc9f8 \ud544\uae30\uc5d0\uc11c\ub294 A, B\ub97c \uc0ac\uc6a9\ud558\uace0\n      \uc608\uc81c \uacc4\uc0b0\uc5d0\uc11c\ub294 a, b\ub97c \uc0ac\uc6a9\ud558\ub294\ub370,\n      \uc6d0\ubb38\uc758 \ud45c\uae30\ub97c \uadf8\ub300\ub85c \uc720\uc9c0\ud588\ub2e4.\n\n      \ub610\ud55c \ub9c8\uc9c0\ub9c9 \uc608\uc81c\uc758 2\u00d72 \ud589\ub82c\uc740\n      \ud544\uae30\uc5d0 \uc801\ud78c \uacc4\uc0b0\uacfc \uacb0\uacfc\ub97c \uadf8\ub300\ub85c \uc62e\uacbc\uc73c\uba70,\n      \uc6d0\ubcf8\uc5d0 \uc5c6\ub294 \ubcc4\ub3c4\uc758 Least Square \uacf5\uc2dd\uc744\n      \uc784\uc758\ub85c \ucd94\uac00\ud558\uc9c0 \uc54a\uc558\ub2e4.\n    <\/strong>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <div class=\"keywords\">\n    Least Square,\n    \ucd5c\uc18c\uc790\uc2b9\ubc95,\n    Parameter Estimation,\n    Linear Regression,\n    Residual,\n    Error Square,\n    Normal Equation,\n    Partial Derivative,\n    Matrix,\n    Inverse Matrix,\n    AX=B,\n    Parameter Identification\n  <\/div>\n\n<\/div>\n&#8220;`\n","protected":false},"excerpt":{"rendered":"<p>\ub2e4\uc74c\uacfc \uac19\uc774 \uc774\uc0b0(Discrete)\uc2dc\uc2a4\ud15c\uc5d0 \ub300\ud55c \ubaa8\ub378\ub9c1 \ud30c\ub77c\uba54\ud130\ub97c \ucd94\uc815\ud558\uace0\uc790 \ud55c\ub2e4. LS(Least Square: \ucd94\uc815\uce58 \uc624\ucc28 \uc790\uc2b9 \ud569)\ubc29\uc2dd\uc744 \uc774\uc6a9\ud560 \ub54c t=4sec \uc21c\uac04\uc758 a\uac12\uc758 \ucd94\uc815\uce58\ub97c \uad6c\ud558\uc2dc\uc624. https:\/\/darkpgmr.tistory.com\/56 &#8220;`html Least Square Least Square \u00b7 \ucd5c\uc18c\uc790\uc2b9\ubc95 \u00b7 Parameter Estimation \u00b7 Linear Regression \u00b7 Normal Equation 1. \ubb38\uc81c \ub2e4\uc74c\uacfc \uac19\uc740 \uc774\uc0b0 \uc2dc\uc2a4\ud15c\uc5d0\uc11c Least Square \ubc29\ubc95\uc744 \uc774\uc6a9\ud558\uc5ec \ubaa8\ub378\ub9c1 Parameter\ub97c \ucd94\uc815\ud55c\ub2e4. u(t) \u2500\u2500\u2500\u2500\u2500\u25ba [ a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1185],"tags":[1468,1469],"class_list":["post-6792","post","type-post","status-publish","format-standard","hentry","category-1185","tag-least-square","tag-1469"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/6792","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/comments?post=6792"}],"version-history":[{"count":8,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/6792\/revisions"}],"predecessor-version":[{"id":9603,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/6792\/revisions\/9603"}],"wp:attachment":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/media?parent=6792"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/categories?post=6792"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/tags?post=6792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}