{"id":26805,"date":"2025-04-09T09:08:34","date_gmt":"2025-04-09T02:08:34","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=26805"},"modified":"2025-07-20T15:10:15","modified_gmt":"2025-07-20T08:10:15","slug":"bagging-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/bagging-la-gi\/","title":{"rendered":"Bagging l\u00e0 g\u00ec? T\u00ecm hi\u1ec3u v\u1ec1 Bagging trong Machine Learning"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed8I DUNG<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/interdata.vn\/blog\/bagging-la-gi\/#Bagging-la-gi\" >Bagging l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/interdata.vn\/blog\/bagging-la-gi\/#Cach-hoat-dong-cua-Bagging\" >C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Bagging<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/bagging-la-gi\/#Loi-ich-noi-bat-cua-Bagging-trong-hoc-may\" >L\u1ee3i \u00edch n\u1ed5i b\u1eadt c\u1ee7a Bagging trong h\u1ecdc m\u00e1y<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/bagging-la-gi\/#Nhung-thach-thuc-chinh-cua-Bagging\" >Nh\u1eefng th\u00e1ch th\u1ee9c ch\u00ednh c\u1ee7a Bagging<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/bagging-la-gi\/#So-sanh-giua-Bagging-va-Boosting\" >So s\u00e1nh gi\u1eefa Bagging v\u00e0 Boosting<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/bagging-la-gi\/#Ung-dung-thuc-te-cua-Bagging\" >\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a Bagging<\/a><\/li><\/ul><\/nav><\/div>\n<p>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u0103ng t\u00ednh \u1ed5n \u0111\u1ecbnh cho c\u00e1c m\u00f4 h\u00ecnh h\u1ecdc m\u00e1y c\u1ee7a b\u1ea1n? Bagging, vi\u1ebft t\u1eaft c\u1ee7a Bootstrap Aggregating, l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt <a href=\"https:\/\/interdata.vn\/blog\/ensemble-learning-la-gi\/\">Ensemble Learning<\/a> m\u1ea1nh m\u1ebd \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ch\u00ednh cho m\u1ee5c \u0111\u00edch n\u00e0y. B\u1eb1ng c\u00e1ch t\u1ea1o ra nhi\u1ec1u <a href=\"https:\/\/interdata.vn\/blog\/dataset-la-gi\/\">t\u1eadp d\u1eef li\u1ec7u<\/a> hu\u1ea5n luy\u1ec7n con v\u00e0 t\u1ed5ng h\u1ee3p k\u1ebft qu\u1ea3 d\u1ef1 \u0111o\u00e1n, Bagging gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t \u0111\u00e1ng k\u1ec3.<\/p>\n<p>B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u gi\u1ea3i th\u00edch Bagging l\u00e0 g\u00ec, c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng chi ti\u1ebft, l\u1ee3i \u00edch v\u00e0 th\u00e1ch th\u1ee9c ch\u00ednh, c\u00f9ng nh\u1eefng \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf ph\u1ed5 bi\u1ebfn c\u1ee7a k\u1ef9 thu\u1eadt Bagging. \u0110\u1ecdc ngay nh\u00e9!<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Bagging-la-gi\"><\/span>Bagging l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Bagging (vi\u1ebft t\u1eaft c\u1ee7a Bootstrap Aggregating) l\u00e0 m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c t\u1ed5 h\u1ee3p trong h\u1ecdc m\u00e1y, nh\u1eb1m n\u00e2ng cao \u0111\u1ed9 tin c\u1eady v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a c\u00e1c m\u00f4 h\u00ecnh d\u1ef1 \u0111o\u00e1n. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y bao g\u1ed3m vi\u1ec7c t\u1ea1o ra nhi\u1ec1u t\u1eadp con t\u1eeb d\u1eef li\u1ec7u hu\u1ea5n luy\u1ec7n th\u00f4ng qua l\u1ea5y m\u1eabu ng\u1eabu nhi\u00ean c\u00f3 ho\u00e0n l\u1ea1i (random sampling with replacement).<\/p>\n<p>C\u00e1c t\u1eadp con n\u00e0y sau \u0111\u00f3 \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 hu\u1ea5n luy\u1ec7n nhi\u1ec1u m\u00f4 h\u00ecnh c\u01a1 s\u1edf (base learners), ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e2y quy\u1ebft \u0111\u1ecbnh (<a href=\"https:\/\/interdata.vn\/blog\/decision-tree-la-gi\/\">decision tree<\/a>), m\u1ea1ng n\u01a1-ron (neural network), ho\u1eb7c c\u00e1c m\u00f4 h\u00ecnh kh\u00e1c.<\/p>\n<figure id=\"attachment_26806\" aria-describedby=\"caption-attachment-26806\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Bagging-la-gi.jpg\" alt=\"Bagging l\u00e0 g\u00ec?\" width=\"800\" height=\"500\" class=\"size-full wp-image-26806\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Bagging-la-gi.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Bagging-la-gi-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Bagging-la-gi-768x480.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Bagging-la-gi-750x469.jpg 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-26806\" class=\"wp-caption-text\">Bagging l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<p>Trong qu\u00e1 tr\u00ecnh d\u1ef1 \u0111o\u00e1n, k\u1ebft qu\u1ea3 t\u1eeb c\u00e1c m\u00f4 h\u00ecnh c\u01a1 s\u1edf \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p l\u1ea1i \u2013 th\u01b0\u1eddng l\u00e0 trung b\u00ecnh h\u00f3a (v\u1edbi c\u00e1c b\u00e0i to\u00e1n h\u1ed3i quy) ho\u1eb7c b\u1ecf phi\u1ebfu \u0111a s\u1ed1 (v\u1edbi c\u00e1c b\u00e0i to\u00e1n ph\u00e2n lo\u1ea1i) \u2013 \u0111\u1ec3 t\u1ea1o ra d\u1ef1 \u0111o\u00e1n cu\u1ed1i c\u00f9ng.<\/p>\n<p>Bagging gi\u00fap gi\u1ea3m thi\u1ec3u hi\u1ec7n t\u01b0\u1ee3ng qu\u00e1 kh\u1edbp (overfitting) b\u1eb1ng c\u00e1ch t\u1ea1o ra s\u1ef1 \u0111a d\u1ea1ng gi\u1eefa c\u00e1c m\u00f4 h\u00ecnh v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t t\u1ed5ng th\u1ec3 th\u00f4ng qua vi\u1ec7c gi\u1ea3m ph\u01b0\u01a1ng sai v\u00e0 t\u0103ng \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach-hoat-dong-cua-Bagging\"><\/span>C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Bagging<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 tri\u1ec3n khai bagging, b\u1ea1n c\u1ea7n th\u1ef1c hi\u1ec7n c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<ul>\n<li>Chu\u1ea9n b\u1ecb d\u1eef li\u1ec7u: L\u00e0m s\u1ea1ch v\u00e0 ti\u1ec1n x\u1eed l\u00fd d\u1eef li\u1ec7u. Sau \u0111\u00f3 chia d\u1eef li\u1ec7u th\u00e0nh t\u1eadp hu\u1ea5n luy\u1ec7n v\u00e0 t\u1eadp ki\u1ec3m tra (test).<\/li>\n<li>L\u1ea5y m\u1eabu Bootstrap: Th\u1ef1c hi\u1ec7n l\u1ea5y m\u1eabu ng\u1eabu nhi\u00ean c\u00f3 ho\u00e0n l\u1ea1i t\u1eeb t\u1eadp hu\u1ea5n luy\u1ec7n \u0111\u1ec3 t\u1ea1o ra nhi\u1ec1u t\u1eadp m\u1eabu bootstrap. M\u1ed7i t\u1eadp m\u1eabu n\u00ean c\u00f3 k\u00edch th\u01b0\u1edbc b\u1eb1ng t\u1eadp d\u1eef li\u1ec7u g\u1ed1c, nh\u01b0ng c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u c\u00f3 th\u1ec3 b\u1ecb l\u1eb7p l\u1ea1i ho\u1eb7c b\u1ecb lo\u1ea1i b\u1ecf.<\/li>\n<li>Hu\u1ea5n luy\u1ec7n m\u00f4 h\u00ecnh: Hu\u1ea5n luy\u1ec7n m\u1ed9t m\u00f4 h\u00ecnh c\u01a1 s\u1edf (v\u00ed d\u1ee5: c\u00e2y quy\u1ebft \u0111\u1ecbnh, m\u1ea1ng n\u01a1-ron,&#8230;) tr\u00ean m\u1ed7i t\u1eadp m\u1eabu bootstrap. M\u1ed7i m\u00f4 h\u00ecnh \u0111\u01b0\u1ee3c hu\u1ea5n luy\u1ec7n \u0111\u1ed9c l\u1eadp v\u1edbi c\u00e1c m\u00f4 h\u00ecnh c\u00f2n l\u1ea1i.<\/li>\n<li>T\u1ea1o d\u1ef1 \u0111o\u00e1n: S\u1eed d\u1ee5ng t\u1eebng m\u00f4 h\u00ecnh \u0111\u00e3 hu\u1ea5n luy\u1ec7n \u0111\u1ec3 d\u1ef1 \u0111o\u00e1n tr\u00ean t\u1eadp ki\u1ec3m tra.<\/li>\n<li>K\u1ebft h\u1ee3p d\u1ef1 \u0111o\u00e1n: K\u1ebft h\u1ee3p c\u00e1c d\u1ef1 \u0111o\u00e1n t\u1eeb t\u1ea5t c\u1ea3 m\u00f4 h\u00ecnh. \u0110\u1ed1i v\u1edbi b\u00e0i to\u00e1n ph\u00e2n lo\u1ea1i, s\u1eed d\u1ee5ng b\u1ecf phi\u1ebfu \u0111a s\u1ed1; c\u00f2n v\u1edbi b\u00e0i to\u00e1n h\u1ed3i quy, s\u1eed d\u1ee5ng trung b\u00ecnh d\u1ef1 \u0111o\u00e1n.<\/li>\n<li>\u0110\u00e1nh gi\u00e1 hi\u1ec7u su\u1ea5t: \u0110\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 c\u1ee7a m\u00f4 h\u00ecnh t\u1ed5 h\u1ee3p tr\u00ean t\u1eadp ki\u1ec3m tra b\u1eb1ng c\u00e1c ch\u1ec9 s\u1ed1 ph\u00f9 h\u1ee3p nh\u01b0 \u0111\u1ed9 ch\u00ednh x\u00e1c (accuracy), \u0111i\u1ec3m F1 (F1 score), sai s\u1ed1 b\u00ecnh ph\u01b0\u01a1ng trung b\u00ecnh (mean squared error),&#8230;<\/li>\n<li>Tinh ch\u1ec9nh si\u00eau tham s\u1ed1 (hyperparameter tuning): N\u1ebfu c\u1ea7n, h\u00e3y tinh ch\u1ec9nh si\u00eau tham s\u1ed1 c\u1ee7a t\u1eebng m\u00f4 h\u00ecnh c\u01a1 s\u1edf ho\u1eb7c c\u1ee7a to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng bagging b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt nh\u01b0 cross-validation.<\/li>\n<li>Tri\u1ec3n khai m\u00f4 h\u00ecnh: Khi m\u00f4 h\u00ecnh t\u1ed5 h\u1ee3p \u0111\u1ea1t hi\u1ec7u su\u1ea5t mong mu\u1ed1n, b\u1ea1n c\u00f3 th\u1ec3 tri\u1ec3n khai \u0111\u1ec3 d\u1ef1 \u0111o\u00e1n tr\u00ean c\u00e1c d\u1eef li\u1ec7u m\u1edbi.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Loi-ich-noi-bat-cua-Bagging-trong-hoc-may\"><\/span>L\u1ee3i \u00edch n\u1ed5i b\u1eadt c\u1ee7a Bagging trong h\u1ecdc m\u00e1y<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Bagging mang l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch trong h\u1ecdc m\u00e1y, ti\u00eau bi\u1ec3u nh\u01b0:<\/p>\n<ul>\n<li>Gi\u1ea3m ph\u01b0\u01a1ng sai (variance): Bagging hu\u1ea5n luy\u1ec7n nhi\u1ec1u m\u00f4 h\u00ecnh c\u01a1 s\u1edf tr\u00ean c\u00e1c t\u1eadp d\u1eef li\u1ec7u kh\u00e1c nhau, nh\u1edd \u0111\u00f3 t\u1ea1o ra s\u1ef1 \u0111a d\u1ea1ng gi\u1eefa c\u00e1c m\u00f4 h\u00ecnh. Khi k\u1ebft h\u1ee3p l\u1ea1i, sai s\u1ed1 gi\u1eefa c\u00e1c m\u00f4 h\u00ecnh c\u00f3 th\u1ec3 tri\u1ec7t ti\u00eau l\u1eabn nhau, gi\u00fap d\u1ef1 \u0111o\u00e1n tr\u1edf n\u00ean \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u00e1ng tin c\u1eady h\u01a1n.<\/li>\n<li>H\u1ea1n ch\u1ebf qu\u00e1 kh\u1edbp: Do c\u00e1c m\u00f4 h\u00ecnh \u0111\u01b0\u1ee3c hu\u1ea5n luy\u1ec7n tr\u00ean nh\u1eefng phi\u00ean b\u1ea3n d\u1eef li\u1ec7u kh\u00e1c nhau, ch\u00fang t\u1eadp trung v\u00e0o nh\u1eefng kh\u00eda c\u1ea1nh kh\u00e1c nhau c\u1ee7a d\u1eef li\u1ec7u. \u0110i\u1ec1u n\u00e0y gi\u00fap h\u1ec7 th\u1ed1ng t\u1ed5 h\u1ee3p kh\u00e1i qu\u00e1t h\u00f3a t\u1ed1t h\u01a1n tr\u00ean d\u1eef li\u1ec7u m\u1edbi.<\/li>\n<li>Kh\u00e1ng nhi\u1ec5u v\u00e0 gi\u00e1 tr\u1ecb ngo\u1ea1i l\u1ec7: Nh\u1edd hu\u1ea5n luy\u1ec7n tr\u00ean nhi\u1ec1u t\u1eadp con kh\u00e1c nhau, h\u1ec7 th\u1ed1ng t\u1ed5 h\u1ee3p \u00edt b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi d\u1eef li\u1ec7u nhi\u1ec5u v\u00e0 c\u00e1c \u0111i\u1ec3m ngo\u1ea1i l\u1ec7.<\/li>\n<li>C\u00f3 th\u1ec3 hu\u1ea5n luy\u1ec7n song song: C\u00e1c m\u00f4 h\u00ecnh trong bagging \u0111\u01b0\u1ee3c hu\u1ea5n luy\u1ec7n \u0111\u1ed9c l\u1eadp, do \u0111\u00f3 c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n hu\u1ea5n luy\u1ec7n song song. \u0110i\u1ec1u n\u00e0y gi\u00fap ti\u1ebft ki\u1ec7m th\u1eddi gian khi x\u1eed l\u00fd c\u00e1c t\u1eadp <a href=\"https:\/\/interdata.vn\/blog\/big-data-la-gi\/\">d\u1eef li\u1ec7u l\u1edbn<\/a> ho\u1eb7c m\u00f4 h\u00ecnh ph\u1ee9c t\u1ea1p.<\/li>\n<li>Linh ho\u1ea1t: Bagging c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng cho nhi\u1ec1u lo\u1ea1i m\u00f4 h\u00ecnh nh\u01b0 c\u00e2y quy\u1ebft \u0111\u1ecbnh, m\u1ea1ng n\u01a1-ron, m\u00e1y vector h\u1ed7 tr\u1ee3 (<a href=\"https:\/\/interdata.vn\/blog\/support-vector-machine-la-gi\/\">SVM<\/a>),&#8230; \u0110i\u1ec1u n\u00e0y cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng t\u1eadn d\u1ee5ng \u01b0u \u0111i\u1ec3m c\u1ee7a c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/thuat-toan-algorithm\/\">thu\u1eadt to\u00e1n<\/a> kh\u00e1c nhau trong m\u1ed9t h\u1ec7 th\u1ed1ng t\u1ed5 h\u1ee3p.<\/li>\n<li>D\u1ec5 tri\u1ec3n khai: So v\u1edbi c\u00e1c k\u1ef9 thu\u1eadt t\u1ed5 h\u1ee3p kh\u00e1c nh\u01b0 boosting hay stacking, bagging d\u1ec5 hi\u1ec3u v\u00e0 d\u1ec5 th\u1ef1c hi\u1ec7n h\u01a1n. \u00dd t\u01b0\u1edfng c\u01a1 b\u1ea3n l\u00e0 l\u1ea5y m\u1eabu ng\u1eabu nhi\u00ean c\u00f3 ho\u00e0n l\u1ea1i v\u00e0 k\u1ebft h\u1ee3p d\u1ef1 \u0111o\u00e1n \u2013 r\u1ea5t tr\u1ef1c quan v\u00e0 th\u00e2n thi\u1ec7n v\u1edbi ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u.<\/li>\n<\/ul>\n<figure id=\"attachment_26808\" aria-describedby=\"caption-attachment-26808\" style=\"width: 968px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Loi-ich-noi-bat-cua-Bagging-trong-hoc-may.webp\" alt=\"L\u1ee3i \u00edch n\u1ed5i b\u1eadt c\u1ee7a Bagging trong h\u1ecdc m\u00e1y\" width=\"968\" height=\"447\" class=\"size-full wp-image-26808\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Loi-ich-noi-bat-cua-Bagging-trong-hoc-may.webp 968w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Loi-ich-noi-bat-cua-Bagging-trong-hoc-may-300x139.webp 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Loi-ich-noi-bat-cua-Bagging-trong-hoc-may-768x355.webp 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Loi-ich-noi-bat-cua-Bagging-trong-hoc-may-750x346.webp 750w\" sizes=\"auto, (max-width: 968px) 100vw, 968px\" \/><figcaption id=\"caption-attachment-26808\" class=\"wp-caption-text\">L\u1ee3i \u00edch n\u1ed5i b\u1eadt c\u1ee7a Bagging trong h\u1ecdc m\u00e1y<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Nhung-thach-thuc-chinh-cua-Bagging\"><\/span>Nh\u1eefng th\u00e1ch th\u1ee9c ch\u00ednh c\u1ee7a Bagging<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Bagging (Bootstrap Aggregating) tuy mang l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch, nh\u01b0ng c\u0169ng \u0111i k\u00e8m m\u1ed9t s\u1ed1 th\u00e1ch th\u1ee9c \u0111\u00e1ng ch\u00fa \u00fd. D\u01b0\u1edbi \u0111\u00e2y, c\u00f9ng InterData t\u00ecm hi\u1ec3u xem nh\u1eefng h\u1ea1n ch\u1ebf c\u1ee7a Bagging l\u00e0 g\u00ec.<\/p>\n<ul>\n<li>M\u1ea5t t\u00ednh di\u1ec5n gi\u1ea3i: Do k\u1ebft qu\u1ea3 d\u1ef1 \u0111o\u00e1n l\u00e0 trung b\u00ecnh t\u1eeb nhi\u1ec1u m\u00f4 h\u00ecnh n\u00ean vi\u1ec7c r\u00fat ra c\u00e1c hi\u1ec3u bi\u1ebft chi ti\u1ebft cho m\u1ee5c \u0111\u00edch kinh doanh tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n. M\u1eb7c d\u00f9 \u0111\u1ea7u ra c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao h\u01a1n so v\u1edbi m\u1ed9t m\u00f4 h\u00ecnh \u0111\u01a1n l\u1ebb, nh\u01b0ng m\u1ed9t t\u1eadp d\u1eef li\u1ec7u \u0111\u1ea7y \u0111\u1ee7 v\u00e0 ch\u00ednh x\u00e1c h\u01a1n \u0111\u00f4i khi c\u00f3 th\u1ec3 mang l\u1ea1i k\u1ebft qu\u1ea3 chi ti\u1ebft h\u01a1n trong m\u1ed9t m\u00f4 h\u00ecnh ph\u00e2n lo\u1ea1i ho\u1eb7c h\u1ed3i quy c\u1ee5 th\u1ec3.<\/li>\n<li>T\u1ed1n nhi\u1ec1u t\u00e0i nguy\u00ean t\u00ednh to\u00e1n: Khi s\u1ed1 l\u01b0\u1ee3ng m\u00f4 h\u00ecnh t\u0103ng l\u00ean, th\u1eddi gian x\u1eed l\u00fd s\u1ebd ch\u1eadm l\u1ea1i v\u00e0 y\u00eau c\u1ea7u t\u00ednh to\u00e1n t\u0103ng cao. V\u00ec v\u1eady, bagging kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u ph\u1ea3n h\u1ed3i th\u1eddi gian th\u1ef1c. C\u00e1c h\u1ec7 th\u1ed1ng t\u00ednh to\u00e1n ph\u00e2n t\u00e1n ho\u1eb7c c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/server-cluster-la-gi\/\">c\u1ee5m m\u00e1y ch\u1ee7<\/a> v\u1edbi nhi\u1ec1u l\u00f5i x\u1eed l\u00fd l\u00e0 l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng \u0111\u1ec3 tri\u1ec3n khai bagging tr\u00ean c\u00e1c t\u1eadp d\u1eef li\u1ec7u l\u1edbn.<\/li>\n<li>\u00cdt linh ho\u1ea1t h\u01a1n: Bagging ph\u00e1t huy hi\u1ec7u qu\u1ea3 t\u1ed1t nh\u1ea5t v\u1edbi c\u00e1c thu\u1eadt to\u00e1n kh\u00f4ng \u1ed5n \u0111\u1ecbnh. V\u1edbi c\u00e1c m\u00f4 h\u00ecnh \u1ed5n \u0111\u1ecbnh ho\u1eb7c c\u00f3 xu h\u01b0\u1edbng sai l\u1ec7ch cao (bias), bagging th\u01b0\u1eddng kh\u00f4ng mang l\u1ea1i nhi\u1ec1u c\u1ea3i thi\u1ec7n v\u00ec c\u00e1c m\u00f4 h\u00ecnh n\u00e0y \u00edt t\u1ea1o ra s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c t\u1eadp d\u1eef li\u1ec7u. Nh\u01b0 \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp trong Hands-On Guide to <a href=\"https:\/\/interdata.vn\/blog\/machine-learning-la-gi\/\">Machine Learning<\/a>, s\u1eed d\u1ee5ng bagging v\u1edbi m\u00f4 h\u00ecnh <a href=\"https:\/\/interdata.vn\/blog\/hoi-quy-tuyen-tinh\/\">h\u1ed3i quy tuy\u1ebfn t\u00ednh<\/a> th\u01b0\u1eddng ch\u1ec9 tr\u1ea3 l\u1ea1i c\u00e1c d\u1ef1 \u0111o\u00e1n g\u1ed1c n\u1ebfu k\u00edch th\u01b0\u1edbc t\u1eadp d\u1eef li\u1ec7u \u0111\u1ee7 l\u1edbn.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"So-sanh-giua-Bagging-va-Boosting\"><\/span>So s\u00e1nh gi\u1eefa Bagging v\u00e0 Boosting<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Boosting l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p t\u1ed5 h\u1ee3p ph\u1ed5 bi\u1ebfn kh\u00e1c, th\u01b0\u1eddng \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi Bagging. S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh n\u1eb1m \u1edf c\u00e1ch hu\u1ea5n luy\u1ec7n c\u00e1c m\u00f4 h\u00ecnh th\u00e0nh ph\u1ea7n.<\/p>\n<ul>\n<li>Trong Bagging, c\u00e1c m\u00f4 h\u00ecnh \u0111\u01b0\u1ee3c hu\u1ea5n luy\u1ec7n \u0111\u1ed9c l\u1eadp v\u00e0 song song tr\u00ean c\u00e1c t\u1eadp d\u1eef li\u1ec7u ng\u1eabu nhi\u00ean kh\u00e1c nhau.<\/li>\n<li>Trong Boosting, c\u00e1c m\u00f4 h\u00ecnh \u0111\u01b0\u1ee3c hu\u1ea5n luy\u1ec7n tu\u1ea7n t\u1ef1, m\u1ed7i m\u00f4 h\u00ecnh h\u1ecdc t\u1eeb nh\u1eefng sai s\u00f3t c\u1ee7a m\u00f4 h\u00ecnh tr\u01b0\u1edbc \u0111\u00f3.<\/li>\n<\/ul>\n<figure id=\"attachment_26807\" aria-describedby=\"caption-attachment-26807\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/So-sanh-giua-Bagging-va-Boosting.jpg\" alt=\"So s\u00e1nh gi\u1eefa Bagging v\u00e0 Boosting\" width=\"800\" height=\"500\" class=\"size-full wp-image-26807\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/So-sanh-giua-Bagging-va-Boosting.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/So-sanh-giua-Bagging-va-Boosting-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/So-sanh-giua-Bagging-va-Boosting-768x480.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/So-sanh-giua-Bagging-va-Boosting-750x469.jpg 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-26807\" class=\"wp-caption-text\">So s\u00e1nh gi\u1eefa Bagging v\u00e0 Boosting<\/figcaption><\/figure>\n<p>Ngo\u00e0i ra:<\/p>\n<ul>\n<li>Bagging th\u01b0\u1eddng k\u1ebft h\u1ee3p d\u1ef1 \u0111o\u00e1n th\u00f4ng qua trung b\u00ecnh h\u00f3a ho\u1eb7c b\u1ecf phi\u1ebfu, trong khi Boosting g\u00e1n tr\u1ecdng s\u1ed1 cho c\u00e1c m\u00f4 h\u00ecnh d\u1ef1a tr\u00ean \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/li>\n<li>Bagging gi\u1ea3m ph\u01b0\u01a1ng sai, c\u00f2n Boosting gi\u1ea3m sai l\u1ec7ch (bias).<\/li>\n<li>Bagging ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c m\u00f4 h\u00ecnh kh\u00f4ng \u1ed5n \u0111\u1ecbnh (nh\u01b0 c\u00e2y quy\u1ebft \u0111\u1ecbnh), trong khi Boosting ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 h\u01a1n v\u1edbi c\u00e1c m\u00f4 h\u00ecnh \u1ed5n \u0111\u1ecbnh (nh\u01b0 h\u1ed3i quy tuy\u1ebfn t\u00ednh).<\/li>\n<\/ul>\n<p>C\u1ea3 hai ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec1u c\u00f3 \u0111i\u1ec3m m\u1ea1nh v\u00e0 \u0111i\u1ec3m y\u1ebfu ri\u00eang. Bagging d\u1ec5 tri\u1ec3n khai song song, c\u00f2n Boosting th\u01b0\u1eddng cho k\u1ebft qu\u1ea3 m\u1ea1nh m\u1ebd v\u00e0 ch\u00ednh x\u00e1c h\u01a1n. Trong th\u1ef1c t\u1ebf, n\u00ean th\u1eed c\u1ea3 hai c\u00e1ch ti\u1ebfp c\u1eadn \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ph\u01b0\u01a1ng ph\u00e1p n\u00e0o ph\u00f9 h\u1ee3p nh\u1ea5t v\u1edbi b\u00e0i to\u00e1n c\u1ee5 th\u1ec3.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Ung-dung-thuc-te-cua-Bagging\"><\/span>\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a Bagging<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Bagging \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p, kh\u00f4ng ch\u1ec9 mang l\u1ea1i gi\u00e1 tr\u1ecb th\u1ef1c ti\u1ec5n m\u00e0 c\u00f2n m\u1edf ra nh\u1eefng g\u00f3c nh\u00ecn th\u00fa v\u1ecb. M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng ti\u00eau bi\u1ec3u g\u1ed3m:<\/p>\n<ul>\n<li>Y t\u1ebf: Bagging \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c m\u00f4 h\u00ecnh d\u1ef1 \u0111o\u00e1n trong l\u0129nh v\u1ef1c y khoa. C\u00e1c nghi\u00ean c\u1ee9u cho th\u1ea5y ph\u01b0\u01a1ng ph\u00e1p t\u1ed5 h\u1ee3p \u0111\u00e3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho nhi\u1ec1u b\u00e0i to\u00e1n trong sinh tin h\u1ecdc (bioinformatics), nh\u01b0 ch\u1ecdn l\u1ecdc gen ho\u1eb7c protein \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc c\u1ee5 th\u1ec3. C\u1ee5 th\u1ec3 h\u01a1n, bagging \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 d\u1ef1 \u0111o\u00e1n kh\u1ea3 n\u0103ng kh\u1edfi ph\u00e1t b\u1ec7nh ti\u1ec3u \u0111\u01b0\u1eddng d\u1ef1a tr\u00ean c\u00e1c y\u1ebfu t\u1ed1 nguy c\u01a1.<\/li>\n<li>C\u00f4ng ngh\u1ec7 th\u00f4ng tin: Bagging gi\u00fap c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c trong c\u00e1c h\u1ec7 th\u1ed1ng CNTT, ch\u1eb3ng h\u1ea1n nh\u01b0 h\u1ec7 th\u1ed1ng ph\u00e1t hi\u1ec7n x\u00e2m nh\u1eadp m\u1ea1ng (network intrusion detection). M\u1ed9t s\u1ed1 nghi\u00ean c\u1ee9u ch\u1ec9 ra r\u1eb1ng bagging kh\u00f4ng ch\u1ec9 n\u00e2ng cao \u0111\u1ed9 ch\u00ednh x\u00e1c m\u00e0 c\u00f2n gi\u00fap gi\u1ea3m t\u1ef7 l\u1ec7 b\u00e1o \u0111\u1ed9ng sai (false positives) trong c\u00e1c h\u1ec7 th\u1ed1ng n\u00e0y.<\/li>\n<li>M\u00f4i tr\u01b0\u1eddng: Trong l\u0129nh v\u1ef1c vi\u1ec5n th\u00e1m, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ed5 h\u1ee3p nh\u01b0 bagging \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 l\u1eadp b\u1ea3n \u0111\u1ed3 c\u00e1c lo\u1ea1i \u0111\u1ea5t ng\u1eadp n\u01b0\u1edbc trong c\u1ea3nh quan ven bi\u1ec3n \u2013 gi\u00fap n\u00e2ng cao \u0111\u1ed9 ch\u00ednh x\u00e1c trong ph\u00e2n lo\u1ea1i.<\/li>\n<li>T\u00e0i ch\u00ednh: Bagging \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u00e0o c\u00e1c m\u00f4 h\u00ecnh h\u1ecdc s\u00e2u trong ng\u00e0nh t\u00e0i ch\u00ednh \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00e1c t\u00e1c v\u1ee5 quan tr\u1ecdng nh\u01b0 ph\u00e1t hi\u1ec7n gian l\u1eadn, \u0111\u00e1nh gi\u00e1 r\u1ee7i ro t\u00edn d\u1ee5ng v\u00e0 \u0111\u1ecbnh gi\u00e1 quy\u1ec1n ch\u1ecdn. M\u1ed9t s\u1ed1 nghi\u00ean c\u1ee9u \u0111\u00e3 ch\u1ee9ng minh bagging, c\u00f9ng v\u1edbi c\u00e1c k\u1ef9 thu\u1eadt h\u1ecdc m\u00e1y kh\u00e1c, h\u1ed7 tr\u1ee3 hi\u1ec7u qu\u1ea3 trong vi\u1ec7c \u0111\u00e1nh gi\u00e1 r\u1ee7i ro v\u1ee1 n\u1ee3. B\u00ean c\u1ea1nh \u0111\u00f3, bagging c\u00f2n gi\u00fap gi\u1ea3m thi\u1ec3u r\u1ee7i ro b\u1eb1ng c\u00e1ch ng\u0103n ch\u1eb7n gian l\u1eadn th\u1ebb t\u00edn d\u1ee5ng trong c\u00e1c t\u1ed5 ch\u1ee9c t\u00e0i ch\u00ednh v\u00e0 ng\u00e2n h\u00e0ng.<\/li>\n<li>Ph\u00e2n lo\u1ea1i v\u00e0 h\u1ed3i quy: Bagging \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c b\u00e0i to\u00e1n ph\u00e2n lo\u1ea1i v\u00e0 h\u1ed3i quy. Trong ph\u00e2n lo\u1ea1i, bagging gi\u00fap t\u0103ng \u0111\u1ed9 ch\u00ednh x\u00e1c b\u1eb1ng c\u00e1ch k\u1ebft h\u1ee3p \u0111\u1ea7u ra t\u1eeb nhi\u1ec1u m\u00f4 h\u00ecnh \u0111\u01b0\u1ee3c hu\u1ea5n luy\u1ec7n tr\u00ean c\u00e1c t\u1eadp d\u1eef li\u1ec7u kh\u00e1c nhau. V\u1edbi b\u00e0i to\u00e1n h\u1ed3i quy, bagging gi\u00fap t\u0103ng \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c b\u1eb1ng c\u00e1ch trung b\u00ecnh h\u00f3a d\u1ef1 \u0111o\u00e1n t\u1eeb nhi\u1ec1u m\u00f4 h\u00ecnh.<\/li>\n<li>Ph\u00e1t hi\u1ec7n b\u1ea5t th\u01b0\u1eddng (anomaly detection): Bagging c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c \u0111i\u1ec3m b\u1ea5t th\u01b0\u1eddng trong d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch hu\u1ea5n luy\u1ec7n nhi\u1ec1u m\u00f4 h\u00ecnh tr\u00ean c\u00e1c t\u1eadp d\u1eef li\u1ec7u con kh\u00e1c nhau. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n ch\u00ednh x\u00e1c v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec5u, \u0111\u1ed3ng th\u1eddi h\u1ea1n ch\u1ebf \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c gi\u00e1 tr\u1ecb ngo\u1ea1i l\u1ec7.<\/li>\n<li>L\u1ef1a ch\u1ecdn \u0111\u1eb7c tr\u01b0ng (feature selection): Ngo\u00e0i vi\u1ec7c c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c, bagging c\u00f2n h\u1ed7 tr\u1ee3 hi\u1ec7u qu\u1ea3 trong vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u1eb7c tr\u01b0ng ph\u00f9 h\u1ee3p cho m\u00f4 h\u00ecnh. B\u1eb1ng c\u00e1ch hu\u1ea5n luy\u1ec7n nhi\u1ec1u m\u00f4 h\u00ecnh tr\u00ean c\u00e1c t\u1eadp \u0111\u1eb7c tr\u01b0ng kh\u00e1c nhau v\u00e0 \u0111\u00e1nh gi\u00e1 hi\u1ec7u su\u1ea5t, bagging gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111\u1eb7c tr\u01b0ng quan tr\u1ecdng nh\u1ea5t, \u0111\u1ed3ng th\u1eddi gi\u1ea3m nguy c\u01a1 qu\u00e1 kh\u1edbp.<\/li>\n<li>D\u1eef li\u1ec7u m\u1ea5t c\u00e2n b\u1eb1ng: Khi d\u1eef li\u1ec7u hu\u1ea5n luy\u1ec7n c\u00f3 s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng gi\u1eefa c\u00e1c l\u1edbp (v\u00ed d\u1ee5: s\u1ed1 l\u01b0\u1ee3ng m\u1eabu c\u1ee7a m\u1ed9t l\u1edbp qu\u00e1 \u00edt), bagging gi\u00fap c\u00e2n b\u1eb1ng t\u1ef7 l\u1ec7 l\u1edbp trong t\u1eebng t\u1eadp con, t\u1eeb \u0111\u00f3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c trong vi\u1ec7c d\u1ef1 \u0111o\u00e1n l\u1edbp thi\u1ec3u s\u1ed1.<\/li>\n<li>T\u1ed5 h\u1ee3p h\u1ecdc (Ensemble Learning): Bagging l\u00e0 th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i c\u1ee7a nhi\u1ec1u k\u1ef9 thu\u1eadt t\u1ed5 h\u1ee3p ph\u1ee9c t\u1ea1p nh\u01b0 <a href=\"https:\/\/interdata.vn\/blog\/random-forest-la-gi\/\">Random Forest<\/a> v\u00e0 Stacking. Trong Random Forest, bagging \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 hu\u1ea5n luy\u1ec7n nhi\u1ec1u c\u00e2y quy\u1ebft \u0111\u1ecbnh. Trong Stacking, bagging t\u1ea1o ra c\u00e1c t\u1eadp d\u1eef li\u1ec7u \u0111a d\u1ea1ng \u0111\u1ec3 hu\u1ea5n luy\u1ec7n nhi\u1ec1u m\u00f4 h\u00ecnh c\u01a1 s\u1edf.<\/li>\n<li>D\u1ef1 b\u00e1o chu\u1ed7i th\u1eddi gian (Time-series forecasting): Bagging c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong c\u00e1c b\u00e0i to\u00e1n d\u1ef1 b\u00e1o chu\u1ed7i th\u1eddi gian nh\u1eb1m c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u1ed5n \u0111\u1ecbnh. B\u1eb1ng c\u00e1ch hu\u1ea5n luy\u1ec7n nhi\u1ec1u m\u00f4 h\u00ecnh d\u1ef1 b\u00e1o tr\u00ean c\u00e1c t\u1eadp d\u1eef li\u1ec7u l\u1ecbch s\u1eed kh\u00e1c nhau, bagging gi\u00fap n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c nhi\u1ec1u xu h\u01b0\u1edbng v\u00e0 m\u1eabu bi\u1ebfn \u0111\u1ed9ng trong d\u1eef li\u1ec7u.<\/li>\n<li>Ph\u00e2n c\u1ee5m (Clustering): Bagging c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c d\u00f9ng trong c\u00e1c b\u00e0i to\u00e1n ph\u00e2n c\u1ee5m, v\u1edbi m\u1ee5c ti\u00eau nh\u00f3m c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u t\u01b0\u01a1ng \u0111\u1ed3ng. B\u1eb1ng c\u00e1ch hu\u1ea5n luy\u1ec7n nhi\u1ec1u m\u00f4 h\u00ecnh ph\u00e2n c\u1ee5m tr\u00ean c\u00e1c t\u1eadp con kh\u00e1c nhau, bagging gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c c\u1ee5m \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u00e1ng tin c\u1eady h\u01a1n, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong d\u1eef li\u1ec7u c\u00f3 nhi\u1ec5u ho\u1eb7c c\u00f3 s\u1ed1 chi\u1ec1u l\u1edbn.<\/li>\n<\/ul>\n<p>Qua b\u00e0i vi\u1ebft, hy v\u1ecdng b\u1ea1n \u0111\u00e3 n\u1eafm v\u1eefng Bagging l\u00e0 g\u00ec v\u00e0 vai tr\u00f2 quan tr\u1ecdng c\u1ee7a n\u00f3 trong vi\u1ec7c c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t m\u00f4 h\u00ecnh h\u1ecdc m\u00e1y. V\u1edbi nh\u1eefng l\u1ee3i \u00edch n\u1ed5i b\u1eadt v\u1ec1 t\u00ednh \u1ed5n \u0111\u1ecbnh, c\u00e1c th\u00e1ch th\u1ee9c c\u1ea7n l\u01b0u \u00fd v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf \u0111a d\u1ea1ng c\u00e0ng kh\u1eb3ng \u0111\u1ecbnh gi\u00e1 tr\u1ecb c\u1ee7a Bagging.<\/p>\n<p>Vi\u1ec7c hi\u1ec3u v\u00e0 \u00e1p d\u1ee5ng th\u00e0nh th\u1ea1o Bagging ch\u1eafc ch\u1eafn s\u1ebd gi\u00fap b\u1ea1n x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c nh\u1eefng h\u1ec7 th\u1ed1ng d\u1ef1 \u0111o\u00e1n m\u1ea1nh m\u1ebd v\u00e0 \u0111\u00e1ng tin c\u1eady h\u01a1n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u0103ng t\u00ednh \u1ed5n \u0111\u1ecbnh cho c\u00e1c m\u00f4 h\u00ecnh h\u1ecdc m\u00e1y c\u1ee7a b\u1ea1n? Bagging, vi\u1ebft t\u1eaft c\u1ee7a Bootstrap Aggregating, l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt Ensemble Learning m\u1ea1nh m\u1ebd \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ch\u00ednh cho m\u1ee5c \u0111\u00edch n\u00e0y. 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