{"id":27079,"date":"2025-04-17T09:08:00","date_gmt":"2025-04-17T02:08:00","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=27079"},"modified":"2025-04-17T09:08:00","modified_gmt":"2025-04-17T02:08:00","slug":"data-preprocessing-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/data-preprocessing-la-gi\/","title":{"rendered":"Data Preprocessing l\u00e0 g\u00ec? Vai tr\u00f2 c\u1ee7a x\u1eed l\u00fd d\u1eef li\u1ec7u trong AI\/ML"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 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\/data-preprocessing-la-gi\/#Data-Preprocessing-la-gi\" >Data Preprocessing 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\/data-preprocessing-la-gi\/#Tam-quan-trong-cua-Data-Preprocessing\" >T\u1ea7m quan tr\u1ecdng c\u1ee7a Data Preprocessing<\/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\/data-preprocessing-la-gi\/#Loi-ich-cua-Data-Preprocessing-cho-hoc-may-va-AI\" >L\u1ee3i \u00edch c\u1ee7a Data Preprocessing cho h\u1ecdc m\u00e1y v\u00e0 AI<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/data-preprocessing-la-gi\/#Dam-bao-du-lieu-chat-luong-cao\" >\u0110\u1ea3m b\u1ea3o d\u1eef li\u1ec7u ch\u1ea5t l\u01b0\u1ee3ng cao<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/data-preprocessing-la-gi\/#Cai-thien-do-chinh-xac-va-hieu-suat-mo-hinh\" >C\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u su\u1ea5t m\u00f4 h\u00ecnh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/data-preprocessing-la-gi\/#Tang-toc-qua-trinh-hoc-va-do-tin-cay-cua-mo-hinh\" >T\u0103ng t\u1ed1c qu\u00e1 tr\u00ecnh h\u1ecdc v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a m\u00f4 h\u00ecnh<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/data-preprocessing-la-gi\/#Cac-buoc-chinh-trong-Data-Preprocessing\" >C\u00e1c b\u01b0\u1edbc ch\u00ednh trong Data Preprocessing<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/data-preprocessing-la-gi\/#Danh-gia-chat-luong-du-lieu\" >\u0110\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/data-preprocessing-la-gi\/#Don-dep-du-lieu\" >D\u1ecdn d\u1eb9p d\u1eef li\u1ec7u<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/data-preprocessing-la-gi\/#Giam-du-lieu\" >Gi\u1ea3m d\u1eef li\u1ec7u<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/data-preprocessing-la-gi\/#Chuyen-doi-du-lieu\" >Chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/data-preprocessing-la-gi\/#Cac-ky-thuat-Data-Preprocessing-pho-bien\" >C\u00e1c k\u1ef9 thu\u1eadt Data Preprocessing ph\u1ed5 bi\u1ebfn<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/data-preprocessing-la-gi\/#Cac-cong-cu-xu-ly-du-lieu-%E2%80%93-Data-Preprocessing\" >C\u00e1c c\u00f4ng c\u1ee5 x\u1eed l\u00fd d\u1eef li\u1ec7u &#8211; Data Preprocessing<\/a><\/li><\/ul><\/nav><\/div>\n<p>Data Preprocessing (X\u1eed l\u00fd d\u1eef li\u1ec7u) \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c chu\u1ea9n b\u1ecb d\u1eef li\u1ec7u cho c\u00e1c t\u00e1c v\u1ee5 ph\u00e2n t\u00edch v\u00e0 h\u1ecdc m\u00e1y. Qu\u00e1 tr\u00ecnh n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u m\u00e0 c\u00f2n \u0111\u1ea3m b\u1ea3o c\u00e1c m\u00f4 h\u00ecnh h\u1ecdc m\u00e1y v\u00e0 AI ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3. B\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 <a href=\"https:\/\/interdata.vn\/blog\/data-preprocessing-la-gi\/\"><strong>Data Preprocessing l\u00e0 g\u00ec<\/strong><\/a>, c\u00e1c b\u01b0\u1edbc trong x\u1eed l\u00fd d\u1eef li\u1ec7u, c\u00e1c k\u1ef9 thu\u1eadt v\u00e0 c\u00f4ng c\u1ee5 ph\u1ed5 bi\u1ebfn, c\u0169ng nh\u01b0 t\u1ea7m quan tr\u1ecdng c\u1ee7a Data Preprocessing trong h\u1ecdc m\u00e1y v\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/tri-tue-nhan-tao-ai\/\">tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o<\/a> ng\u00e0y nay. \u0110\u1ecdc ngay!<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Data-Preprocessing-la-gi\"><\/span>Data Preprocessing l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Data Preprocessing (X\u1eed l\u00fd d\u1eef li\u1ec7u) l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng trong vi\u1ec7c chu\u1ea9n b\u1ecb d\u1eef li\u1ec7u, \u0111\u1ec1 c\u1eadp \u0111\u1ebfn b\u1ea5t k\u1ef3 quy tr\u00ecnh n\u00e0o \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho d\u1eef li\u1ec7u th\u00f4 \u0111\u1ec3 chu\u1ea9n b\u1ecb cho c\u00e1c t\u00e1c v\u1ee5 ph\u00e2n t\u00edch ho\u1eb7c x\u1eed l\u00fd ti\u1ebfp theo.<\/strong><\/p>\n<figure id=\"attachment_27080\" aria-describedby=\"caption-attachment-27080\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Data-Preprocessing-la-gi.png\" alt=\"Data Preprocessing l\u00e0 g\u00ec?\" width=\"800\" height=\"500\" class=\"size-full wp-image-27080\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Data-Preprocessing-la-gi.png 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Data-Preprocessing-la-gi-300x188.png 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Data-Preprocessing-la-gi-768x480.png 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Data-Preprocessing-la-gi-750x469.png 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-27080\" class=\"wp-caption-text\">Data Preprocessing l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<p>L\u00fac tr\u01b0\u1edbc, Data Preprocessing \u0111\u00e3 lu\u00f4n l\u00e0 m\u1ed9t b\u01b0\u1edbc s\u01a1 b\u1ed9 quan tr\u1ecdng trong ph\u00e2n t\u00edch d\u1eef li\u1ec7u. Tuy nhi\u00ean, g\u1ea7n \u0111\u00e2y, c\u00e1c k\u1ef9 thu\u1eadt n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 hu\u1ea5n luy\u1ec7n c\u00e1c m\u00f4 h\u00ecnh h\u1ecdc m\u00e1y v\u00e0 tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o (AI) v\u00e0 th\u1ef1c hi\u1ec7n suy lu\u1eadn t\u1eeb ch\u00fang.<\/p>\n<p>Do \u0111\u00f3, x\u1eed l\u00fd d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u th\u00f4 th\u00e0nh \u0111\u1ecbnh d\u1ea1ng m\u00e0 c\u00f3 th\u1ec3 x\u1eed l\u00fd hi\u1ec7u qu\u1ea3 v\u00e0 ch\u00ednh x\u00e1c h\u01a1n trong c\u00e1c t\u00e1c v\u1ee5 nh\u01b0:<\/p>\n<ul>\n<li>Ph\u00e2n t\u00edch d\u1eef li\u1ec7u<\/li>\n<li>H\u1ecdc m\u00e1y<\/li>\n<li>Khoa h\u1ecdc d\u1eef li\u1ec7u<\/li>\n<li>Tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o (AI)<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Tam-quan-trong-cua-Data-Preprocessing\"><\/span>T\u1ea7m quan tr\u1ecdng c\u1ee7a Data Preprocessing<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Kh\u00f4ng l\u00e2u tr\u01b0\u1edbc \u0111\u00e2y, thi\u1ebfu d\u1eef li\u1ec7u l\u00e0 th\u00e1ch th\u1ee9c l\u1edbn nh\u1ea5t m\u00e0 b\u1ea1n ph\u1ea3i \u0111\u1ed1i m\u1eb7t khi s\u1eed d\u1ee5ng ph\u00e2n t\u00edch m\u1ea1nh m\u1ebd \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 kinh doanh. Khi \u0111\u00f3, vi\u1ec7c ki\u1ec3m tra l\u1ed7i ho\u1eb7c s\u1ef1 kh\u00f4ng nh\u1ea5t qu\u00e1n trong m\u1ed9t b\u1ed9 d\u1eef li\u1ec7u nh\u1ecf l\u00e0 kh\u00e1 d\u1ec5 d\u00e0ng.<\/p>\n<p>Hi\u1ec7n nay, ch\u00fang ta c\u00f3 qu\u00e1 nhi\u1ec1u d\u1eef li\u1ec7u \u0111\u1ebfn m\u1ee9c d\u1ec5 d\u00e0ng m\u1ea5t ki\u1ec3m so\u00e1t v\u1ec1 nh\u1eefng g\u00ec \u0111\u00fang v\u00e0 sai. Ng\u00e0y c\u00e0ng nhi\u1ec1u c\u00f4ng ty ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi &#8220;d\u1eef li\u1ec7u b\u1ea9n&#8221;, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m ch\u1eadm to\u00e0n b\u1ed9 b\u1ed9 ph\u1eadn v\u00e0 d\u1eabn \u0111\u1ebfn c\u00e1c l\u1ed7i nghi\u00eam tr\u1ecdng.<\/p>\n<p>C\u00e1c gi\u1ea3i ph\u00e1p nh\u01b0 h\u1ecdc m\u00e1y (ML) v\u00e0 tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o (AI) c\u00f3 th\u1ec3 gi\u00fap l\u00e0m s\u00e1ng t\u1ecf d\u1eef li\u1ec7u, nh\u01b0ng ch\u1ec9 khi ch\u00fang nh\u1eadn \u0111\u01b0\u1ee3c \u0111\u1ea7u v\u00e0o ch\u00ednh x\u00e1c. Trong l\u0129nh v\u1ef1c h\u1ecdc m\u00e1y, b\u1ea1n s\u1ebd th\u01b0\u1eddng nghe c\u00e2u n\u00f3i &#8220;garbage in, garbage out&#8221;, \u0111i\u1ec1u n\u00e0y t\u00f3m t\u1eaft v\u1ea5n \u0111\u1ec1 m\u1ed9t c\u00e1ch ho\u00e0n h\u1ea3o. N\u1ebfu b\u1ea1n cung c\u1ea5p th\u00f4ng tin sai cho m\u00e1y, b\u1ea1n s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 sai.<\/p>\n<p>Data Preprocessing c\u00f3 th\u1ec3 gi\u00fap gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<ul>\n<li><strong>Ph\u00e1t hi\u1ec7n gi\u00e1 tr\u1ecb ngo\u1ea1i l\u1ec7:<\/strong> C\u00e1c gi\u00e1 tr\u1ecb ngo\u1ea1i l\u1ec7 c\u00f3 th\u1ec3 l\u00e0m sai l\u1ec7ch k\u1ebft qu\u1ea3 n\u1ebfu b\u1ea1n kh\u00f4ng ph\u00e1t hi\u1ec7n k\u1ecbp th\u1eddi. X\u1eed l\u00fd d\u1eef li\u1ec7u c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 x\u1eed l\u00fd nh\u1eefng ngo\u1ea1i l\u1ec7 n\u00e0y, lo\u1ea1i b\u1ecf ho\u1eb7c chuy\u1ec3n \u0111\u1ed5i ch\u00fang.<\/li>\n<li><strong>X\u1eed l\u00fd d\u1eef li\u1ec7u thi\u1ebfu:<\/strong> \u0110\u00f4i khi, trong m\u1ed9t b\u1ed9 d\u1eef li\u1ec7u t\u01b0\u1edfng ch\u1eebng ho\u00e0n h\u1ea3o, th\u00f4ng tin quan tr\u1ecdng c\u00f3 th\u1ec3 b\u1ecb thi\u1ebfu. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 thi\u00ean l\u1ec7ch v\u00e0 ph\u00e2n t\u00edch sai. V\u1edbi Data Preprocessing, b\u1ea1n c\u00f3 th\u1ec3 t\u00ecm v\u00e0 s\u1eeda d\u1eef li\u1ec7u thi\u1ebfu.<\/li>\n<li><strong>Gi\u1ea3m chi\u1ec1u d\u1eef li\u1ec7u:<\/strong> D\u1eef li\u1ec7u c\u00f3 nhi\u1ec1u chi\u1ec1u y\u00eau c\u1ea7u t\u00ednh to\u00e1n ph\u1ee9c t\u1ea1p v\u00e0 c\u00f3 th\u1ec3 l\u00e0m ch\u1eadm h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n. Trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd d\u1eef li\u1ec7u, b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n gi\u1ea3m chi\u1ec1u, m\u1ed9t qu\u00e1 tr\u00ecnh gi\u00fap gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng \u0111\u1eb7c tr\u01b0ng trong d\u1eef li\u1ec7u m\u00e0 v\u1eabn gi\u1eef l\u1ea1i th\u00f4ng tin quan tr\u1ecdng.<\/li>\n<li><strong>C\u1ea3i thi\u1ec7n quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt:<\/strong> \u0110\u00f4i khi, \u0111\u1ec3 tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh b\u1ea3o m\u1eadt ho\u1eb7c y\u00eau c\u1ea7u c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, b\u1ea1n c\u1ea7n \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p nh\u01b0 \u1ea9n danh. Trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd d\u1eef li\u1ec7u, b\u1ea1n c\u00f3 th\u1ec3 \u1ea9n danh ho\u1eb7c x\u00f3a c\u00e1c th\u00f4ng tin nh\u1ea1y c\u1ea3m \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 v\u00e0 b\u1ea3o m\u1eadt.<\/li>\n<li><strong>T\u0103ng t\u1ed1c ph\u00e2n t\u00edch:<\/strong> Khi d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c chu\u1ea9n h\u00f3a, kh\u00f4ng c\u00f3 l\u1ed7i hay v\u1ea5n \u0111\u1ec1 n\u00e0o kh\u00e1c, to\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch s\u1ebd nhanh h\u01a1n.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Loi-ich-cua-Data-Preprocessing-cho-hoc-may-va-AI\"><\/span>L\u1ee3i \u00edch c\u1ee7a Data Preprocessing cho h\u1ecdc m\u00e1y v\u00e0 AI<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>C\u1ea3 h\u1ecdc m\u00e1y (ML) v\u00e0 AI \u0111\u1ec1u ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t khi ch\u00fang c\u00f3 m\u1ed9t l\u01b0\u1ee3ng l\u1edbn d\u1eef li\u1ec7u t\u1ed1t. N\u1ebfu kh\u00f4ng c\u00f3 Data Preprocessing, c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/thuat-toan-algorithm\/\">thu\u1eadt to\u00e1n<\/a> n\u00e0y s\u1ebd th\u1ea5t b\u1ea1i s\u1edbm hay mu\u1ed9n.<\/p>\n<p>ML v\u00e0 AI h\u1ecdc t\u1eeb d\u1eef li\u1ec7u ch\u00fang nh\u1eadn \u0111\u01b0\u1ee3c. N\u1ebfu ch\u00fang nh\u1eadn th\u00f4ng tin sai, k\u1ebft lu\u1eadn c\u1ee7a ch\u00fang s\u1ebd ch\u1ee9a s\u1ef1 thi\u00ean l\u1ec7ch v\u00e0 th\u00f4ng tin kh\u00f4ng ch\u00ednh x\u00e1c.<\/p>\n<p>H\u01a1n n\u1eefa, h\u1ea7u h\u1ebft c\u00e1c thu\u1eadt to\u00e1n h\u1ecdc m\u00e1y \u0111\u01a1n gi\u1ea3n s\u1ebd kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng tr\u00ean d\u1eef li\u1ec7u th\u00f4. B\u1ea1n c\u1ea7n ph\u1ea3i chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u sao cho ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u c\u1ee7a thu\u1eadt to\u00e1n h\u1ecdc m\u00e1y.<\/p>\n<p>\u0110i\u1ec1u t\u01b0\u01a1ng t\u1ef1 c\u0169ng \u00e1p d\u1ee5ng v\u1edbi c\u00e1c thu\u1eadt to\u00e1n AI. M\u1ed7i thu\u1eadt to\u00e1n s\u1ebd y\u00eau c\u1ea7u m\u1ed9t \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u nh\u1ea5t \u0111\u1ecbnh. N\u1ebfu b\u1ea1n cung c\u1ea5p \u0111\u1ecbnh d\u1ea1ng sai, thu\u1eadt to\u00e1n c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng nh\u01b0ng k\u1ebft qu\u1ea3 s\u1ebd kh\u00f4ng t\u1ed1i \u01b0u. C\u00e1c thu\u1eadt to\u00e1n AI c\u0169ng d\u1ec5 b\u1ecb thi\u00ean l\u1ec7ch. Ch\u00fang kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u00fang sai, v\u00ec v\u1eady \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a d\u1eef li\u1ec7u l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng.<\/p>\n<figure id=\"attachment_27081\" aria-describedby=\"caption-attachment-27081\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Loi-ich-cua-Data-Preprocessing-cho-hoc-may-va-AI.jpg\" alt=\"L\u1ee3i \u00edch c\u1ee7a Data Preprocessing cho h\u1ecdc m\u00e1y v\u00e0 AI\" width=\"800\" height=\"500\" class=\"size-full wp-image-27081\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Loi-ich-cua-Data-Preprocessing-cho-hoc-may-va-AI.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Loi-ich-cua-Data-Preprocessing-cho-hoc-may-va-AI-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Loi-ich-cua-Data-Preprocessing-cho-hoc-may-va-AI-768x480.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Loi-ich-cua-Data-Preprocessing-cho-hoc-may-va-AI-750x469.jpg 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-27081\" class=\"wp-caption-text\">L\u1ee3i \u00edch c\u1ee7a Data Preprocessing cho h\u1ecdc m\u00e1y v\u00e0 AI<\/figcaption><\/figure>\n<p>Ngo\u00e0i ra, Data Preprocessing c\u0169ng mang l\u1ea1i m\u1ed9t s\u1ed1 l\u1ee3i \u00edch cho h\u1ecdc m\u00e1y nh\u01b0:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dam-bao-du-lieu-chat-luong-cao\"><\/span>\u0110\u1ea3m b\u1ea3o d\u1eef li\u1ec7u ch\u1ea5t l\u01b0\u1ee3ng cao<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>X\u1eed l\u00fd d\u1eef li\u1ec7u \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a ph\u00e2n t\u00edch. D\u1eef li\u1ec7u \u0111\u00e3 qua x\u1eed l\u00fd, kh\u00f4ng c\u00f3 nhi\u1ec5u v\u00e0 s\u1ef1 kh\u00f4ng nh\u1ea5t qu\u00e1n, gi\u00fap c\u00e1c m\u00f4 h\u00ecnh nh\u1eadn di\u1ec7n v\u00e0 h\u1ecdc t\u1eeb c\u00e1c \u0111\u1eb7c tr\u01b0ng quan tr\u1ecdng, <strong>n\u00e2ng cao \u0111\u1ed9 ch\u00ednh x\u00e1c trong d\u1ef1 \u0111o\u00e1n v\u00e0 kh\u1ea3 n\u0103ng ra quy\u1ebft \u0111\u1ecbnh<\/strong>.<\/p>\n<p>Qu\u00e1 tr\u00ecnh Data Preprocessing bao g\u1ed3m nhi\u1ec1u ho\u1ea1t \u0111\u1ed9ng nh\u01b0 l\u00e0m s\u1ea1ch d\u1eef li\u1ec7u, x\u1eed l\u00fd gi\u00e1 tr\u1ecb thi\u1ebfu, chu\u1ea9n h\u00f3a ho\u1eb7c t\u1ef7 l\u1ec7 h\u00f3a c\u00e1c \u0111\u1eb7c tr\u01b0ng, m\u00e3 h\u00f3a c\u00e1c bi\u1ebfn ph\u00e2n lo\u1ea1i v\u00e0 gi\u1ea3m chi\u1ec1u d\u1eef li\u1ec7u. M\u1ed7i b\u01b0\u1edbc gi\u00fap c\u1ea3i thi\u1ec7n b\u1ed9 d\u1eef li\u1ec7u sao cho c\u00e1c thu\u1eadt to\u00e1n h\u1ecdc m\u00e1y c\u00f3 th\u1ec3 gi\u1ea3i th\u00edch v\u00e0 x\u1eed l\u00fd d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u qu\u1ea3. V\u00ed d\u1ee5, hi\u1ec3u c\u00e1ch <a href=\"https:\/\/interdata.vn\/blog\/support-vector-machine-la-gi\/\">SVM<\/a> ho\u1ea1t \u0111\u1ed9ng l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng khi ch\u1ecdn thu\u1eadt to\u00e1n ph\u00f9 h\u1ee3p cho c\u00e1c t\u00e1c v\u1ee5 ph\u00e2n lo\u1ea1i.<\/p>\n<p>Ch\u1eb3ng h\u1ea1n, chu\u1ea9n h\u00f3a \u0111\u1eb7c tr\u01b0ng \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1eb7c tr\u01b0ng \u0111\u1ea7u v\u00e0o c\u00f3 tr\u1ecdng s\u1ed1 nh\u01b0 nhau, ng\u0103n kh\u00f4ng cho m\u1ed9t \u0111\u1eb7c tr\u01b0ng n\u00e0o \u1ea3nh h\u01b0\u1edfng qu\u00e1 m\u1ee9c \u0111\u1ebfn k\u1ebft qu\u1ea3 c\u1ee7a m\u00f4 h\u00ecnh. T\u01b0\u01a1ng t\u1ef1, m\u00e3 h\u00f3a c\u00e1c bi\u1ebfn ph\u00e2n lo\u1ea1i th\u00e0nh d\u1ea1ng s\u1ed1 l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ed1i v\u1edbi m\u1ed9t s\u1ed1 thu\u1eadt to\u00e1n ch\u1ec9 nh\u1eadn d\u1eef li\u1ec7u s\u1ed1 l\u00e0m \u0111\u1ea7u v\u00e0o.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cai-thien-do-chinh-xac-va-hieu-suat-mo-hinh\"><\/span>C\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u su\u1ea5t m\u00f4 h\u00ecnh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Data Preprocessing trong h\u1ecdc m\u00e1y gi\u00fap lo\u1ea1i b\u1ecf nhi\u1ec1u tr\u1edf ng\u1ea1i c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t c\u1ee7a m\u00f4 h\u00ecnh. \u0110i\u1ec1u n\u00e0y gi\u00fap ch\u00fang ta \u0111\u01b0a ra c\u00e1c d\u1ef1 \u0111o\u00e1n ch\u00ednh x\u00e1c, \u0111\u00e1ng tin c\u1eady v\u00e0 m\u1ea1nh m\u1ebd h\u01a1n.<\/p>\n<p>X\u1eed l\u00fd d\u1eef li\u1ec7u b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i hi\u1ec7n t\u01b0\u1ee3ng qu\u00e1 kh\u1edbp, n\u01a1i m\u00f4 h\u00ecnh c\u00f3 th\u1ec3 coi nhi\u1ec5u l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a t\u00edn hi\u1ec7u, l\u00e0m suy y\u1ebfu kh\u1ea3 n\u0103ng t\u1ed5ng qu\u00e1t v\u1edbi d\u1eef li\u1ec7u m\u1edbi. C\u00e1c k\u1ef9 thu\u1eadt nh\u01b0 chu\u1ea9n h\u00f3a v\u00e0 t\u1ef7 l\u1ec7 h\u00f3a \u0111\u1eb7c tr\u01b0ng gi\u00fap m\u00f4 h\u00ecnh d\u1ec5 d\u00e0ng th\u00edch nghi.<\/p>\n<p>K\u1ef9 thu\u1eadt \u0111\u1eb7c tr\u01b0ng, m\u1ed9t ph\u1ea7n quan tr\u1ecdng trong ph\u00e1t tri\u1ec3n m\u00f4 h\u00ecnh, \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 r\u1ea5t t\u1ed1t b\u1edfi x\u1eed l\u00fd d\u1eef li\u1ec7u. N\u00f3 gi\u00fap t\u1ea1o ra c\u00e1c \u0111\u1eb7c tr\u01b0ng s\u00e1ng t\u1ea1o t\u1eeb d\u1eef li\u1ec7u hi\u1ec7n c\u00f3, c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t m\u00f4 h\u00ecnh.<\/p>\n<p>Ch\u1eb3ng h\u1ea1n, c\u00f3 m\u1ed9t b\u1ed9 d\u1eef li\u1ec7u kh\u1ea3o s\u00e1t y t\u1ebf v\u1edbi h\u00e0ng tr\u0103m \u0111\u1eb7c tr\u01b0ng. Th\u00f4ng qua x\u1eed l\u00fd d\u1eef li\u1ec7u, \u0111\u1eb7c bi\u1ec7t l\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/feature-selection-la-gi\/\">l\u1ef1a ch\u1ecdn \u0111\u1eb7c tr\u01b0ng<\/a>, b\u1ea1n c\u00f3 th\u1ec3 <strong>x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111\u1eb7c tr\u01b0ng quan tr\u1ecdng nh\u1ea5t<\/strong> nh\u01b0 tu\u1ed5i, tri\u1ec7u ch\u1ee9ng v\u00e0 l\u1ecbch s\u1eed y t\u1ebf \u0111\u1ec3 d\u1ef1 \u0111o\u00e1n b\u1ec7nh. \u0110i\u1ec1u n\u00e0y gi\u00fap lo\u1ea1i b\u1ecf c\u00e1c chi ti\u1ebft \u00edt quan tr\u1ecdng h\u01a1n, nh\u01b0 m\u00e0u s\u1eafc y\u00eau th\u00edch c\u1ee7a b\u1ec7nh nh\u00e2n, n\u00e2ng cao \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a m\u00f4 h\u00ecnh d\u1ef1 \u0111o\u00e1n m\u00e0 kh\u00f4ng thay \u0111\u1ed5i d\u1eef li\u1ec7u g\u1ed1c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tang-toc-qua-trinh-hoc-va-do-tin-cay-cua-mo-hinh\"><\/span>T\u0103ng t\u1ed1c qu\u00e1 tr\u00ecnh h\u1ecdc v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a m\u00f4 h\u00ecnh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Hi\u1ec7u qu\u1ea3 c\u1ee7a qu\u00e1 tr\u00ecnh hu\u1ea5n luy\u1ec7n c\u0169ng \u0111\u01b0\u1ee3c <strong>c\u1ea3i thi\u1ec7n r\u1ea5t nhi\u1ec1u nh\u1edd x\u1eed l\u00fd d\u1eef li\u1ec7u<\/strong>. C\u00e1c thu\u1eadt to\u00e1n c\u00f3 th\u1ec3 nh\u1eadn di\u1ec7n m\u1eabu trong d\u1eef li\u1ec7u s\u1ea1ch nhanh ch\u00f3ng h\u01a1n, t\u1eeb \u0111\u00f3 gi\u1ea3m th\u1eddi gian, c\u00f4ng s\u1ee9c v\u00e0 n\u0103ng l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft \u0111\u1ec3 hu\u1ea5n luy\u1ec7n thu\u1eadt to\u00e1n. \u0110\u00e2y l\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng trong m\u00f4i tr\u01b0\u1eddng d\u1eef li\u1ec7u l\u1edbn.<\/p>\n<p>H\u01a1n n\u1eefa, \u0111\u1ed9 tin c\u1eady c\u1ee7a c\u00e1c th\u00f4ng tin r\u00fat ra t\u1eeb AI v\u00e0 h\u1ecdc m\u00e1y ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a qu\u00e1 tr\u00ecnh x\u1eed l\u00fd d\u1eef li\u1ec7u. N\u00f3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o cho m\u00f4 h\u00ecnh l\u00e0 \u0111\u00e1ng tin c\u1eady, gi\u00fap \u0111\u01b0a ra d\u1ef1 \u0111o\u00e1n \u0111\u00e1ng tin c\u1eady v\u00e0 c\u00f3 th\u1ec3 h\u00e0nh \u0111\u1ed9ng.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-buoc-chinh-trong-Data-Preprocessing\"><\/span>C\u00e1c b\u01b0\u1edbc ch\u00ednh trong Data Preprocessing<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>X\u1eed l\u00fd d\u1eef li\u1ec7u Data Preprocessing c\u00f3 b\u1ed1n b\u01b0\u1edbc ch\u00ednh:<\/p>\n<ul>\n<li><strong>\u0110\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u<\/strong><\/li>\n<li><strong>D\u1ecdn d\u1eb9p d\u1eef li\u1ec7u<\/strong><\/li>\n<li><strong>Chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u<\/strong><\/li>\n<li><strong>Gi\u1ea3m d\u1eef li\u1ec7u<\/strong><\/li>\n<\/ul>\n<p>H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u chi ti\u1ebft t\u1eebng b\u01b0\u1edbc \u0111\u1ec3 hi\u1ec3u h\u01a1n Data Preprocessing l\u00e0 g\u00ec.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Danh-gia-chat-luong-du-lieu\"><\/span>\u0110\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Khi nh\u00ecn qua l\u1ea7n \u0111\u1ea7u, d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 c\u00f3 v\u1ebb \u0111\u00fang, nh\u01b0ng th\u1ef1c s\u1ef1 l\u00e0 nh\u01b0 th\u1ebf n\u00e0o? Tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u l\u00e0m vi\u1ec7c v\u1edbi d\u1eef li\u1ec7u v\u00e0 chu\u1ea9n b\u1ecb n\u00f3 cho c\u00e1c b\u01b0\u1edbc ti\u1ebfp theo, b\u1ea1n ph\u1ea3i th\u1ef1c hi\u1ec7n m\u1ed9t \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ec3 x\u00e1c minh r\u1eb1ng d\u1eef li\u1ec7u th\u1ef1c s\u1ef1 ch\u00ednh x\u00e1c. C\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn th\u01b0\u1eddng g\u1eb7p, \u0111\u1eb7c bi\u1ec7t khi thu th\u1eadp th\u00f4ng tin t\u1eeb nhi\u1ec1u ngu\u1ed3n, bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>D\u1eef li\u1ec7u kh\u00f4ng kh\u1edbp ki\u1ec3u:<\/strong> C\u00e1c ngu\u1ed3n kh\u00e1c nhau c\u00f3 th\u1ec3 c\u00f3 d\u1eef li\u1ec7u \u1edf c\u00e1c \u0111\u1ecbnh d\u1ea1ng kh\u00e1c nhau, \u0111i\u1ec1u n\u00e0y s\u1ebd l\u00e0m cho m\u00e1y t\u00ednh g\u1ea7n nh\u01b0 kh\u00f4ng th\u1ec3 gi\u1ea3i th\u00edch ch\u00ednh x\u00e1c m\u1ecdi th\u1ee9.<\/li>\n<li><strong>D\u1eef li\u1ec7u thi\u1ebfu:<\/strong> \u0110\u00f4i khi d\u1eef li\u1ec7u kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7, c\u00f3 th\u1ec3 do l\u1ed7i c\u1ee7a con ng\u01b0\u1eddi ho\u1eb7c m\u00e1y m\u00f3c. D\u00f9 nguy\u00ean nh\u00e2n l\u00e0 g\u00ec, n\u00f3 s\u1ebd l\u00e0m sai l\u1ec7ch k\u1ebft qu\u1ea3 v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c x\u1eed l\u00fd.<\/li>\n<li><strong>Ngo\u1ea1i l\u1ec7:<\/strong> Nh\u1eefng gi\u00e1 tr\u1ecb ngo\u1ea1i l\u1ec7 c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn ph\u00e2n t\u00edch d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n, \u0111\u1eb7c bi\u1ec7t n\u1ebfu b\u1ea1n \u0111ang c\u1ed1 g\u1eafng t\u00ednh to\u00e1n trung b\u00ecnh ho\u1eb7c nh\u1eadn di\u1ec7n xu h\u01b0\u1edbng th\u1ed1ng k\u00ea. B\u1ea1n c\u1ea7n t\u00ecm v\u00e0 x\u1eed l\u00fd ch\u00fang trong qu\u00e1 tr\u00ecnh \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u.<\/li>\n<li><strong>M\u00f4 t\u1ea3 gi\u00e1 tr\u1ecb h\u1ed7n h\u1ee3p:<\/strong> D\u1eef li\u1ec7u c\u00f3 th\u1ec3 tr\u00f4ng \u0111\u1ed3ng nh\u1ea5t, nh\u01b0ng th\u1ef1c t\u1ebf kh\u00f4ng ph\u1ea3i v\u1eady. V\u00ed d\u1ee5, vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c t\u1eeb \u0111\u1ed3ng ngh\u0129a \u0111\u1ec3 ch\u1ec9 c\u00f9ng m\u1ed9t th\u1ee9 trong c\u00e1c gi\u00e1 tr\u1ecb d\u1eef li\u1ec7u kh\u00e1c nhau c\u00f3 th\u1ec3 g\u00e2y sai l\u1ec7ch k\u1ebft qu\u1ea3 v\u00ec m\u00e1y t\u00ednh kh\u00f4ng lu\u00f4n nh\u1eadn bi\u1ebft \u0111\u00f3 l\u00e0 c\u00f9ng m\u1ed9t th\u1ee9.<\/li>\n<\/ul>\n<figure id=\"attachment_27082\" aria-describedby=\"caption-attachment-27082\" style=\"width: 690px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Cac-buoc-chinh-trong-Data-Preprocessing.jpg\" alt=\"C\u00e1c b\u01b0\u1edbc ch\u00ednh trong Data Preprocessing\" width=\"690\" height=\"400\" class=\"size-full wp-image-27082\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Cac-buoc-chinh-trong-Data-Preprocessing.jpg 690w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Cac-buoc-chinh-trong-Data-Preprocessing-300x174.jpg 300w\" sizes=\"auto, (max-width: 690px) 100vw, 690px\" \/><figcaption id=\"caption-attachment-27082\" class=\"wp-caption-text\">C\u00e1c b\u01b0\u1edbc ch\u00ednh trong Data Preprocessing<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Don-dep-du-lieu\"><\/span>D\u1ecdn d\u1eb9p d\u1eef li\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Sau khi th\u1ef1c hi\u1ec7n \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng, b\u01b0\u1edbc ti\u1ebfp theo l\u00e0 d\u1ecdn d\u1eb9p d\u1eef li\u1ec7u. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m vi\u1ec7c s\u1eeda ch\u1eefa, lo\u1ea1i b\u1ecf ho\u1eb7c s\u1eeda l\u1ea1i b\u1ea5t k\u1ef3 d\u1eef li\u1ec7u kh\u00f4ng li\u00ean quan n\u00e0o. Qu\u00e1 tr\u00ecnh n\u00e0y s\u1ebd thay \u0111\u1ed5i \u0111\u00f4i ch\u00fat t\u00f9y theo v\u1ea5n \u0111\u1ec1 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh trong b\u01b0\u1edbc \u0111\u1ea7u.<\/p>\n<ul>\n<li>\u0110\u1ed1i v\u1edbi d\u1eef li\u1ec7u thi\u1ebfu, b\u1ea1n c\u00f3 th\u1ec3 th\u00eam th\u00f4ng tin b\u1ecb thi\u1ebfu m\u1ed9t c\u00e1ch th\u1ee7 c\u00f4ng ho\u1eb7c lo\u1ea1i b\u1ecf c\u00e1c m\u1ee5c b\u1ecb \u1ea3nh h\u01b0\u1edfng. Vi\u1ec7c lo\u1ea1i b\u1ecf d\u1eef li\u1ec7u ch\u1ec9 \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 d\u1eef li\u1ec7u l\u1edbn, n\u1ebfu kh\u00f4ng s\u1ebd l\u00e0m sai l\u1ec7ch k\u1ebft qu\u1ea3.<\/li>\n<li>\u0110\u1ed1i v\u1edbi d\u1eef li\u1ec7u ngo\u1ea1i l\u1ec7, d\u1eef li\u1ec7u kh\u00f4ng kh\u1edbp ho\u1eb7c h\u1ed7n h\u1ee3p \u2013 qu\u00e1 tr\u00ecnh s\u1eeda ch\u1eefa c\u00f3 th\u1ec3 ph\u1ee9c t\u1ea1p h\u01a1n. M\u1ed9t v\u00ed d\u1ee5 l\u00e0 s\u1eed d\u1ee5ng h\u1ed3i quy, gi\u00fap b\u1ea1n ch\u1ecdn d\u1eef li\u1ec7u c\u1ea7n s\u1eed d\u1ee5ng trong ph\u00e2n t\u00edch v\u00e0 lo\u1ea1i b\u1ecf d\u1eef li\u1ec7u kh\u00f4ng c\u1ea7n thi\u1ebft.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Giam-du-lieu\"><\/span>Gi\u1ea3m d\u1eef li\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>B\u01b0\u1edbc n\u00e0y li\u00ean quan \u0111\u1ebfn vi\u1ec7c gi\u1ea3m k\u00edch th\u01b0\u1edbc b\u1ed9 d\u1eef li\u1ec7u, ch\u1ec9 s\u1eed d\u1ee5ng th\u00f4ng tin li\u00ean quan nh\u1ea5t. M\u1ed9t s\u1ed1 k\u1ef9 thu\u1eadt ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>L\u1ef1a ch\u1ecdn \u0111\u1eb7c tr\u01b0ng:<\/strong> Lo\u1ea1i b\u1ecf c\u00e1c \u0111\u1eb7c tr\u01b0ng d\u01b0 th\u1eeba kh\u1ecfi d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n.<\/li>\n<li><strong>Tr\u00edch xu\u1ea5t \u0111\u1eb7c tr\u01b0ng:<\/strong> S\u1eed d\u1ee5ng khi d\u1eef li\u1ec7u ban \u0111\u1ea7u qu\u00e1 ph\u1ee9c t\u1ea1p v\u00e0 c\u00f3 chi\u1ec1u cao. K\u1ef9 thu\u1eadt n\u00e0y gi\u00fap b\u1ea1n tr\u00edch xu\u1ea5t nh\u1eefng \u0111\u1eb7c tr\u01b0ng quan tr\u1ecdng m\u00e0 kh\u00f4ng l\u00e0m m\u1ea5t th\u00f4ng tin thi\u1ebft y\u1ebfu.<\/li>\n<li><strong>N\u00e9n:<\/strong> M\u1ee5c ti\u00eau c\u1ee7a n\u00e9n l\u00e0 gi\u1ea3m k\u00edch th\u01b0\u1edbc b\u1ed9 d\u1eef li\u1ec7u m\u00e0 kh\u00f4ng m\u1ea5t th\u00f4ng tin.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Chuyen-doi-du-lieu\"><\/span>Chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Sau khi d\u1eef li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c d\u1ecdn d\u1eb9p v\u00e0 gi\u1ea3m xu\u1ed1ng m\u1ee9c c\u1ea7n thi\u1ebft, b\u1ea1n c\u00f3 th\u1ec3 chuy\u1ec3n sang qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i. M\u1ed9t trong nh\u1eefng k\u1ef9 thu\u1eadt ph\u1ed5 bi\u1ebfn l\u00e0 t\u1ed5ng h\u1ee3p, k\u1ebft h\u1ee3p d\u1eef li\u1ec7u trong m\u1ed9t \u0111\u1ecbnh d\u1ea1ng th\u1ed1ng nh\u1ea5t.<\/p>\n<p>M\u1ed9t l\u1ef1a ch\u1ecdn kh\u00e1c l\u00e0 chu\u1ea9n h\u00f3a, gi\u00fap b\u1ea1n \u0111i\u1ec1u ch\u1ec9nh d\u1eef li\u1ec7u trong m\u1ed9t ph\u1ea1m vi nh\u1ea5t \u0111\u1ecbnh. Ph\u00e2n bi\u1ec7t h\u00f3a cho ph\u00e9p b\u1ea1n chia d\u1eef li\u1ec7u th\u00e0nh c\u00e1c kho\u1ea3ng, gi\u1ea3m k\u00edch th\u01b0\u1edbc d\u1eef li\u1ec7u v\u00e0 gi\u00fap m\u00e1y t\u00ednh d\u1ec5 hi\u1ec3u h\u01a1n.<\/p>\n<p><iframe loading=\"lazy\" title=\"H\u01b0\u1edbng D\u1eabn C\u00e1c B\u01b0\u1edbc Ti\u1ec1n X\u1eed L\u00fd D\u1eef Li\u1ec7u b\u1eb1ng Scikit-Learn\" width=\"1020\" height=\"574\" src=\"https:\/\/www.youtube.com\/embed\/VsXKtjddXWY?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-ky-thuat-Data-Preprocessing-pho-bien\"><\/span>C\u00e1c k\u1ef9 thu\u1eadt Data Preprocessing ph\u1ed5 bi\u1ebfn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>C\u00e1c k\u1ef9 thu\u1eadt Data Preprocessing gi\u00fap b\u1ea1n tinh ch\u1ec9nh d\u1eef li\u1ec7u cho c\u00e1c m\u00f4 h\u00ecnh h\u1ecdc m\u00e1y ho\u1eb7c ph\u00e2n t\u00edch th\u1ed1ng k\u00ea. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 k\u1ef9 thu\u1eadt ph\u1ed5 bi\u1ebfn:<\/p>\n<p><strong>\u0110i\u1ec1n d\u1eef li\u1ec7u thi\u1ebfu (Data Imputation)<\/strong><\/p>\n<p>D\u1eef li\u1ec7u thi\u1ebfu c\u00f3 th\u1ec3 l\u00e0m sai l\u1ec7ch ph\u00e2n t\u00edch v\u00e0 d\u1eabn \u0111\u1ebfn c\u00e1c m\u00f4 h\u00ecnh kh\u00f4ng ch\u00ednh x\u00e1c. C\u00e1c chi\u1ebfn l\u01b0\u1ee3c x\u1eed l\u00fd gi\u00e1 tr\u1ecb thi\u1ebfu bao g\u1ed3m \u0111i\u1ec1n d\u1eef li\u1ec7u (\u0111i\u1ec1n v\u00e0o c\u00e1c gi\u00e1 tr\u1ecb thi\u1ebfu b\u1eb1ng c\u00e1c s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea nh\u01b0 trung b\u00ecnh ho\u1eb7c trung v\u1ecb) ho\u1eb7c s\u1eed d\u1ee5ng c\u00e1c thu\u1eadt to\u00e1n c\u00f3 th\u1ec3 <strong>x\u1eed l\u00fd d\u1eef li\u1ec7u thi\u1ebfu<\/strong>, ch\u1eb3ng h\u1ea1n nh\u01b0 <a href=\"https:\/\/interdata.vn\/blog\/random-forest-la-gi\/\">r\u1eebng ng\u1eabu nhi\u00ean<\/a> (random forests).<\/p>\n<p><strong>Gi\u1ea3m d\u1eef li\u1ec7u \u1ed3n (Reduce Noisy Data)<\/strong><\/p>\n<p>D\u1eef li\u1ec7u \u1ed3n c\u00f3 th\u1ec3 che khu\u1ea5t c\u00e1c m\u1eabu quan tr\u1ecdng. C\u00e1c k\u1ef9 thu\u1eadt nh\u01b0 l\u00e0m m\u01b0\u1ee3t (s\u1eed d\u1ee5ng trung b\u00ecnh \u0111\u1ed9ng) v\u00e0 l\u1ecdc (\u00e1p d\u1ee5ng c\u00e1c thu\u1eadt to\u00e1n \u0111\u1ec3 lo\u1ea1i b\u1ecf nhi\u1ec5u) gi\u00fap <strong>l\u00e0m r\u00f5 t\u00edn hi\u1ec7u trong d\u1eef li\u1ec7u<\/strong>. V\u00ed d\u1ee5, trung b\u00ecnh \u0111\u1ed9ng c\u00f3 th\u1ec3 l\u00e0m m\u01b0\u1ee3t c\u00e1c bi\u1ebfn \u0111\u1ed9ng ng\u1eafn h\u1ea1n v\u00e0 l\u00e0m n\u1ed5i b\u1eadt c\u00e1c xu h\u01b0\u1edbng d\u00e0i h\u1ea1n.<\/p>\n<p><strong>Ph\u00e1t hi\u1ec7n v\u00e0 lo\u1ea1i b\u1ecf d\u1eef li\u1ec7u tr\u00f9ng l\u1eb7p (Identify and Remove Duplicates)<\/strong><\/p>\n<p>D\u1eef li\u1ec7u tr\u00f9ng l\u1eb7p c\u00f3 th\u1ec3 l\u00e0m sai l\u1ec7ch ph\u00e2n t\u00edch, d\u1eabn \u0111\u1ebfn k\u1ebft qu\u1ea3 thi\u00ean l\u1ec7ch. Vi\u1ec7c ph\u00e1t hi\u1ec7n c\u00f3 th\u1ec3 \u0111\u01a1n gi\u1ea3n nh\u01b0 t\u00ecm ki\u1ebfm c\u00e1c b\u1ea3n ghi gi\u1ed1ng nhau ho\u1eb7c ph\u1ee9c t\u1ea1p h\u01a1n nh\u01b0 nh\u1eadn di\u1ec7n c\u00e1c b\u1ea3n sao g\u1ea7n gi\u1ed1ng th\u00f4ng qua ph\u01b0\u01a1ng ph\u00e1p so kh\u1edbp m\u1edd. Vi\u1ec7c lo\u1ea1i b\u1ecf \u0111\u1ea3m b\u1ea3o m\u1ed7i \u0111i\u1ec3m d\u1eef li\u1ec7u l\u00e0 duy nh\u1ea5t, duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n cho b\u1ed9 d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n.<\/p>\n<figure id=\"attachment_27083\" aria-describedby=\"caption-attachment-27083\" style=\"width: 848px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Cac-ky-thuat-Data-Preprocessing-pho-bien.jpg\" alt=\"C\u00e1c k\u1ef9 thu\u1eadt Data Preprocessing ph\u1ed5 bi\u1ebfn\" width=\"848\" height=\"477\" class=\"size-full wp-image-27083\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Cac-ky-thuat-Data-Preprocessing-pho-bien.jpg 848w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Cac-ky-thuat-Data-Preprocessing-pho-bien-300x169.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Cac-ky-thuat-Data-Preprocessing-pho-bien-768x432.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/04\/Cac-ky-thuat-Data-Preprocessing-pho-bien-750x422.jpg 750w\" sizes=\"auto, (max-width: 848px) 100vw, 848px\" \/><figcaption id=\"caption-attachment-27083\" class=\"wp-caption-text\">C\u00e1c k\u1ef9 thu\u1eadt Data Preprocessing ph\u1ed5 bi\u1ebfn<\/figcaption><\/figure>\n<p><strong>K\u1ef9 thu\u1eadt \u0111\u1eb7c tr\u01b0ng (<a href=\"https:\/\/interdata.vn\/blog\/feature-engineering-la-gi\/\">Feature Engineering<\/a>)<\/strong><\/p>\n<p>T\u1ea1o ra c\u00e1c \u0111\u1eb7c tr\u01b0ng m\u1edbi t\u1eeb d\u1eef li\u1ec7u hi\u1ec7n c\u00f3 c\u00f3 th\u1ec3 gi\u00fap ph\u00e1t hi\u1ec7n nh\u1eefng th\u00f4ng tin s\u00e2u s\u1eafc. Qu\u00e1 tr\u00ecnh n\u00e0y c\u00f3 th\u1ec3 bao g\u1ed3m vi\u1ec7c k\u1ebft h\u1ee3p hai bi\u1ebfn \u0111\u1ec3 t\u1ea1o ra m\u1ed9t bi\u1ebfn m\u1edbi, ch\u1eb3ng h\u1ea1n nh\u01b0 t\u00ednh ch\u1ec9 s\u1ed1 BMI t\u1eeb c\u00e2n n\u1eb7ng v\u00e0 chi\u1ec1u cao ho\u1eb7c tr\u00edch xu\u1ea5t c\u00e1c ph\u1ea7n d\u1eef li\u1ec7u (nh\u01b0 ng\u00e0y trong tu\u1ea7n) cho ph\u00e2n t\u00edch chu\u1ed7i th\u1eddi gian.<\/p>\n<p><strong>Chu\u1ea9n h\u00f3a ho\u1eb7c t\u1ef7 l\u1ec7 \u0111\u1eb7c tr\u01b0ng (Feature Scaling or Normalization)<\/strong><\/p>\n<p>Vi\u1ec7c chu\u1ea9n h\u00f3a c\u00e1c \u0111\u1eb7c tr\u01b0ng v\u1ec1 m\u1ed9t ph\u1ea1m vi \u0111\u1ed3ng nh\u1ea5t gi\u00fap \u0111\u1ea3m b\u1ea3o kh\u00f4ng c\u00f3 \u0111\u1eb7c tr\u01b0ng n\u00e0o chi\u1ebfm \u01b0u th\u1ebf trong m\u00f4 h\u00ecnh ch\u1ec9 v\u00ec s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 t\u1ef7 l\u1ec7. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p bao g\u1ed3m chu\u1ea9n h\u00f3a min-max, \u0111i\u1ec1u ch\u1ec9nh l\u1ea1i \u0111\u1eb7c tr\u01b0ng trong m\u1ed9t ph\u1ea1m vi c\u1ed1 \u0111\u1ecbnh, th\u01b0\u1eddng l\u00e0 t\u1eeb 0 \u0111\u1ebfn 1, ho\u1eb7c chu\u1ea9n h\u00f3a, l\u00e0m trung t\u00e2m \u0111\u1eb7c tr\u01b0ng \u1edf s\u1ed1 0 v\u1edbi \u0111\u1ed9 l\u1ec7ch chu\u1ea9n \u0111\u01a1n v\u1ecb.<\/p>\n<p><strong>Gi\u1ea3m chi\u1ec1u d\u1eef li\u1ec7u (Dimensionality Reduction)<\/strong><\/p>\n<p>C\u00e1c k\u1ef9 thu\u1eadt gi\u1ea3m chi\u1ec1u d\u1eef li\u1ec7u, nh\u01b0 Ph\u00e2n T\u00edch Th\u00e0nh Ph\u1ea7n Ch\u00ednh (<a href=\"https:\/\/interdata.vn\/blog\/pca-la-gi\/\">PCA<\/a>), gi\u00fap <strong>gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng c\u00e1c bi\u1ebfn c\u1ea7n xem x\u00e9t<\/strong>, \u0111\u01a1n gi\u1ea3n h\u00f3a m\u00f4 h\u00ecnh m\u00e0 kh\u00f4ng m\u1ea5t th\u00f4ng tin quan tr\u1ecdng. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t m\u00f4 h\u00ecnh v\u00e0 gi\u1ea3m \u0111\u1ed9 ph\u1ee9c t\u1ea1p t\u00ednh to\u00e1n.<\/p>\n<p><strong>Ph\u00e2n bi\u1ec7t h\u00f3a d\u1eef li\u1ec7u (Discretization)<\/strong><\/p>\n<p>Chuy\u1ec3n \u0111\u1ed5i c\u00e1c \u0111\u1eb7c tr\u01b0ng li\u00ean t\u1ee5c th\u00e0nh c\u00e1c nh\u00f3m ph\u00e2n bi\u1ec7t c\u00f3 th\u1ec3 gi\u00fap d\u1eef li\u1ec7u d\u1ec5 qu\u1ea3n l\u00fd h\u01a1n v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t m\u00f4 h\u00ecnh. V\u00ed d\u1ee5, tu\u1ed5i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n nh\u00f3m th\u00e0nh c\u00e1c h\u1ea1ng m\u1ee5c nh\u01b0 &#8220;18-25&#8221;, &#8220;26-35&#8221;, v.v., \u0111\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a ph\u00e2n t\u00edch v\u00e0 l\u00e0m n\u1ed5i b\u1eadt c\u00e1c xu h\u01b0\u1edbng theo th\u1ebf h\u1ec7.<\/p>\n<p><strong>M\u00e3 h\u00f3a \u0111\u1eb7c tr\u01b0ng (Feature Encoding)<\/strong><\/p>\n<p>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p <a href=\"https:\/\/interdata.vn\/blog\/ma-hoa-du-lieu-data-encryption\/\">m\u00e3 h\u00f3a d\u1eef li\u1ec7u<\/a> ph\u00e2n lo\u1ea1i, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u00e3 h\u00f3a one-hot ho\u1eb7c m\u00e3 h\u00f3a nh\u00e3n, chuy\u1ec3n c\u00e1c bi\u1ebfn ph\u00e2n lo\u1ea1i th\u00e0nh d\u1ea1ng s\u1ed1 cho vi\u1ec7c hu\u1ea5n luy\u1ec7n m\u00f4 h\u00ecnh. M\u00e3 h\u00f3a l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft cho c\u00e1c thu\u1eadt to\u00e1n y\u00eau c\u1ea7u \u0111\u1ea7u v\u00e0o s\u1ed1.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-cong-cu-xu-ly-du-lieu-%E2%80%93-Data-Preprocessing\"><\/span>C\u00e1c c\u00f4ng c\u1ee5 x\u1eed l\u00fd d\u1eef li\u1ec7u &#8211; Data Preprocessing<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>C\u00e1c c\u00f4ng c\u1ee5 x\u1eed l\u00fd d\u1eef li\u1ec7u gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a c\u00e1ch b\u1ea1n t\u01b0\u01a1ng t\u00e1c v\u1edbi d\u1eef li\u1ec7u l\u1edbn, l\u00e0m cho vi\u1ec7c h\u00ecnh th\u00e0nh v\u00e0 l\u00e0m s\u1ea1ch d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p tr\u1edf n\u00ean d\u1ec5 d\u00e0ng h\u01a1n. M\u1ed9t s\u1ed1 c\u00f4ng c\u1ee5 x\u1eed l\u00fd d\u1eef li\u1ec7u gi\u00fap th\u1ef1c hi\u1ec7n qu\u00e1 tr\u00ecnh n\u00e0y bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Pandas<\/strong>: Th\u01b0 vi\u1ec7n Python n\u00e0y cung c\u1ea5p m\u1ed9t lo\u1ea1t c\u00e1c ch\u1ee9c n\u0103ng \u0111\u1ec3 x\u1eed l\u00fd d\u1eef li\u1ec7u, gi\u00fap vi\u1ec7c l\u00e0m s\u1ea1ch, l\u1ecdc v\u00e0 t\u1ed5ng h\u1ee3p d\u1eef li\u1ec7u l\u1edbn tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng.<\/li>\n<li><strong>Scikit-learn<\/strong>: Scikit-learn \u0111\u01b0\u1ee3c trang b\u1ecb \u0111\u1ea7y \u0111\u1ee7 \u0111\u1ec3 x\u1eed l\u00fd m\u1ecdi th\u1ee9 t\u1eeb chu\u1ea9n h\u00f3a \u0111\u1eb7c tr\u01b0ng \u0111\u1ebfn m\u00e3 h\u00f3a c\u00e1c bi\u1ebfn ph\u00e2n lo\u1ea1i, \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n \u1edf tr\u1ea1ng th\u00e1i t\u1ed1t nh\u1ea5t \u0111\u1ec3 m\u00f4 h\u00ecnh h\u00f3a.<\/li>\n<li><strong>OpenRefine<\/strong>: \u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c th\u00e1ch th\u1ee9c t\u1eeb d\u1eef li\u1ec7u r\u1ed1i, OpenRefine l\u00e0 c\u00f4ng c\u1ee5 \u0111\u1ed9c l\u1eadp gi\u00fap l\u00e0m s\u1ea1ch v\u00e0 chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u. N\u00f3 r\u1ea5t h\u1eefu \u00edch trong vi\u1ec7c chu\u1ea9n h\u00f3a \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u v\u00e0 l\u00e0m gi\u00e0u b\u1ed9 d\u1eef li\u1ec7u b\u1eb1ng th\u00f4ng tin t\u1eeb c\u00e1c ngu\u1ed3n b\u00ean ngo\u00e0i.<\/li>\n<\/ul>\n<p>C\u00e1c c\u00f4ng c\u1ee5 x\u1eed l\u00fd d\u1eef li\u1ec7u t\u1ef1 \u0111\u1ed9ng gi\u00fap b\u1ea1n t\u1eadp trung v\u00e0o vi\u1ec7c r\u00fat ra nh\u1eefng th\u00f4ng tin quan tr\u1ecdng thay v\u00ec b\u1ecb m\u1eafc k\u1eb9t trong vi\u1ec7c chu\u1ea9n b\u1ecb d\u1eef li\u1ec7u.<\/p>\n<p>Data Preprocessing l\u00e0 b\u01b0\u1edbc kh\u00f4ng th\u1ec3 thi\u1ebfu trong b\u1ea5t k\u1ef3 d\u1ef1 \u00e1n h\u1ecdc m\u00e1y ho\u1eb7c AI n\u00e0o, gi\u00fap c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u v\u00e0 n\u00e2ng cao hi\u1ec7u su\u1ea5t m\u00f4 h\u00ecnh. V\u1edbi c\u00e1c k\u1ef9 thu\u1eadt nh\u01b0 l\u00e0m s\u1ea1ch, gi\u1ea3m chi\u1ec1u d\u1eef li\u1ec7u, v\u00e0 m\u00e3 h\u00f3a \u0111\u1eb7c tr\u01b0ng, b\u1ea1n c\u00f3 th\u1ec3 chu\u1ea9n b\u1ecb d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c nh\u1eefng k\u1ebft qu\u1ea3 ph\u00e2n t\u00edch ch\u00ednh x\u00e1c.<\/p>\n<p>C\u00e1c c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3 x\u1eed l\u00fd d\u1eef li\u1ec7u nh\u01b0 Pandas, Scikit-learn v\u00e0 OpenRefine c\u00e0ng l\u00e0m cho qu\u00e1 tr\u00ecnh n\u00e0y tr\u1edf n\u00ean d\u1ec5 d\u00e0ng v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n. H\u00e3y \u00e1p d\u1ee5ng \u0111\u00fang c\u00e1c k\u1ef9 thu\u1eadt v\u00e0 c\u00f4ng c\u1ee5 Data Preprocessing \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a d\u1ef1 \u00e1n h\u1ecdc m\u00e1y c\u1ee7a b\u1ea1n.<\/p>\n<p>T\u1ea1i InterData, ch\u00fang t\u00f4i cung c\u1ea5p d\u1ecbch v\u1ee5 <a href=\"https:\/\/interdata.vn\/thue-hosting\/\">Hosting gi\u00e1 r\u1ebb t\u1ed1c \u0111\u1ed9 cao<\/a>, s\u1eed d\u1ee5ng ph\u1ea7n c\u1ee9ng th\u1ebf h\u1ec7 m\u1edbi nh\u01b0 <a href=\"https:\/\/interdata.vn\/blog\/cpu-server\/\">CPU<\/a> AMD EPYC\/Intel Xeon Platinum v\u00e0 SSD NVMe U.2, gi\u00fap b\u1ea1n tri\u1ec3n khai <a href=\"https:\/\/interdata.vn\/blog\/website-la-gi\/\">website<\/a> v\u00e0 \u1ee9ng d\u1ee5ng m\u01b0\u1ee3t m\u00e0, t\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t v\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/bang-thong-la-gi\/\">b\u0103ng th\u00f4ng<\/a> cao. C\u00e1c g\u00f3i d\u1ecbch v\u1ee5 n\u00e0y \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u c\u1ee7a doanh nghi\u1ec7p v\u1edbi chi ph\u00ed h\u1ee3p l\u00fd.<\/p>\n<p>Ngo\u00e0i ra, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o d\u1ecbch v\u1ee5 <a href=\"https:\/\/interdata.vn\/thue-vps\/\">thu\u00ea VPS ch\u1ea5t l\u01b0\u1ee3ng gi\u00e1 r\u1ebb<\/a> ho\u1eb7c <a href=\"https:\/\/interdata.vn\/cloud-server\/\">thu\u00ea Cloud Server gi\u00e1 r\u1ebb t\u1ed1c \u0111\u1ed9 cao<\/a>\u00a0t\u1ea1i InterData. V\u1edbi c\u1ea5u h\u00ecnh m\u1ea1nh m\u1ebd, dung l\u01b0\u1ee3ng t\u1ed1i \u01b0u v\u00e0 \u1ed5n \u0111\u1ecbnh, c\u00e1c gi\u1ea3i ph\u00e1p n\u00e0y h\u1ed7 tr\u1ee3 c\u00e1c d\u1ef1 \u00e1n c\u1ea7n hi\u1ec7u su\u1ea5t cao, gi\u00fap ti\u1ebft ki\u1ec7m chi ph\u00ed v\u00e0 n\u00e2ng cao tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng. H\u00e3y li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i \u0111\u1ec3 nh\u1eadn th\u00eam th\u00f4ng tin chi ti\u1ebft.<\/p>\n<p><strong>INTERDATA<\/strong><\/p>\n<ul>\n<li><strong>Website:<\/strong><span>\u00a0<\/span>Interdata.vn<\/li>\n<li><strong>Hotline:<\/strong><span>\u00a0<\/span>1900-636822<\/li>\n<li><strong>Email:<\/strong><span>\u00a0<\/span>Info@interdata.vn<\/li>\n<li><strong>VP\u0110D:<\/strong><span>\u00a0<\/span>240 Nguy\u1ec5n \u0110\u00ecnh Ch\u00ednh, P.11. Q. Ph\u00fa Nhu\u1eadn, TP. Ho\u0302\u0300 Ch\u00ed Minh<\/li>\n<li><strong>VPGD:<\/strong><span>\u00a0<\/span>S\u1ed1 211 \u0110\u01b0\u1eddng s\u1ed1 5, K\u0110T Lakeview City, P. An Ph\u00fa, TP. Th\u1ee7 \u0110\u1ee9c, TP. H\u1ed3 Ch\u00ed Minh<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Data Preprocessing (X\u1eed l\u00fd d\u1eef li\u1ec7u) \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c chu\u1ea9n b\u1ecb d\u1eef li\u1ec7u cho c\u00e1c t\u00e1c v\u1ee5 ph\u00e2n t\u00edch v\u00e0 h\u1ecdc m\u00e1y. Qu\u00e1 tr\u00ecnh n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u m\u00e0 c\u00f2n \u0111\u1ea3m b\u1ea3o c\u00e1c m\u00f4 h\u00ecnh h\u1ecdc m\u00e1y v\u00e0 AI ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3. B\u00e0i vi\u1ebft<\/p>\n","protected":false},"author":11,"featured_media":27084,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[],"class_list":["post-27079","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ai"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/27079","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=27079"}],"version-history":[{"count":2,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/27079\/revisions"}],"predecessor-version":[{"id":27086,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/27079\/revisions\/27086"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/27084"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=27079"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=27079"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=27079"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}