{"id":478331,"date":"2023-08-09T09:31:12","date_gmt":"2023-08-09T09:31:12","guid":{"rendered":""},"modified":"2023-09-05T11:16:31","modified_gmt":"2023-09-05T11:16:31","slug":"pandas","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/pandas\/","title":{"rendered":"g\u1ea5u tr\u00fac"},"content":{"rendered":"<p>Pandas l\u00e0 th\u01b0 vi\u1ec7n ph\u00e2n t\u00edch v\u00e0 x\u1eed l\u00fd d\u1eef li\u1ec7u ngu\u1ed3n m\u1edf ph\u1ed5 bi\u1ebfn d\u00e0nh cho ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh Python. N\u00f3 cung c\u1ea5p c\u00e1c c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd v\u00e0 linh ho\u1ea1t \u0111\u1ec3 l\u00e0m vi\u1ec7c v\u1edbi d\u1eef li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh c\u00f4ng c\u1ee5 thi\u1ebft y\u1ebfu cho c\u00e1c nh\u00e0 khoa h\u1ecdc, nh\u00e0 ph\u00e2n t\u00edch v\u00e0 nh\u00e0 nghi\u00ean c\u1ee9u d\u1eef li\u1ec7u. Pandas \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u ng\u00e0nh kh\u00e1c nhau, bao g\u1ed3m t\u00e0i ch\u00ednh, y t\u1ebf, ti\u1ebfp th\u1ecb v\u00e0 h\u1ecdc vi\u1ec7n, \u0111\u1ec3 x\u1eed l\u00fd d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3 v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c nhi\u1ec7m v\u1ee5 ph\u00e2n t\u00edch d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng.<\/p>\n<h2>L\u1ecbch s\u1eed v\u1ec1 ngu\u1ed3n g\u1ed1c c\u1ee7a G\u1ea5u tr\u00fac v\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn n\u00f3.<\/h2>\n<p>Pandas \u0111\u01b0\u1ee3c Wes McKinney th\u00e0nh l\u1eadp v\u00e0o n\u0103m 2008 khi \u00f4ng \u0111ang l\u00e0m nh\u00e0 ph\u00e2n t\u00edch t\u00e0i ch\u00ednh t\u1ea1i AQR Capital Management. Th\u1ea5t v\u1ecdng v\u1edbi nh\u1eefng h\u1ea1n ch\u1ebf c\u1ee7a c\u00e1c c\u00f4ng c\u1ee5 ph\u00e2n t\u00edch d\u1eef li\u1ec7u hi\u1ec7n c\u00f3, McKinney nh\u1eafm \u0111\u1ebfn vi\u1ec7c x\u00e2y d\u1ef1ng m\u1ed9t th\u01b0 vi\u1ec7n c\u00f3 th\u1ec3 x\u1eed l\u00fd hi\u1ec7u qu\u1ea3 c\u00e1c nhi\u1ec7m v\u1ee5 ph\u00e2n t\u00edch d\u1eef li\u1ec7u trong th\u1ebf gi\u1edbi th\u1ef1c, quy m\u00f4 l\u1edbn. Anh ph\u00e1t h\u00e0nh phi\u00ean b\u1ea3n \u0111\u1ea7u ti\u00ean c\u1ee7a Pandas v\u00e0o th\u00e1ng 1 n\u0103m 2009, phi\u00ean b\u1ea3n n\u00e0y ban \u0111\u1ea7u \u0111\u01b0\u1ee3c l\u1ea5y c\u1ea3m h\u1ee9ng t\u1eeb khung d\u1eef li\u1ec7u v\u00e0 kh\u1ea3 n\u0103ng thao t\u00e1c d\u1eef li\u1ec7u c\u1ee7a ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh R.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 Pandas. M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1 Pandas.<\/h2>\n<p>Pandas \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng d\u1ef1a tr\u00ean hai c\u1ea5u tr\u00fac d\u1eef li\u1ec7u c\u01a1 b\u1ea3n: Chu\u1ed7i v\u00e0 DataFrame. C\u00e1c c\u1ea5u tr\u00fac d\u1eef li\u1ec7u n\u00e0y cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng x\u1eed l\u00fd v\u00e0 thao t\u00e1c d\u1eef li\u1ec7u \u1edf d\u1ea1ng b\u1ea3ng. S\u00ea-ri l\u00e0 m\u1ea3ng \u0111\u01b0\u1ee3c g\u1eafn nh\u00e3n m\u1ed9t chi\u1ec1u c\u00f3 th\u1ec3 ch\u1ee9a d\u1eef li\u1ec7u thu\u1ed9c b\u1ea5t k\u1ef3 lo\u1ea1i n\u00e0o, trong khi DataFrame l\u00e0 c\u1ea5u tr\u00fac d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c g\u1eafn nh\u00e3n hai chi\u1ec1u v\u1edbi c\u00e1c c\u1ed9t c\u00f3 c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u c\u00f3 th\u1ec3 kh\u00e1c nhau.<\/p>\n<p>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a Pandas bao g\u1ed3m:<\/p>\n<ul>\n<li>C\u0103n ch\u1ec9nh d\u1eef li\u1ec7u v\u00e0 x\u1eed l\u00fd d\u1eef li\u1ec7u b\u1ecb thi\u1ebfu: Pandas t\u1ef1 \u0111\u1ed9ng c\u0103n ch\u1ec9nh d\u1eef li\u1ec7u v\u00e0 x\u1eed l\u00fd c\u00e1c gi\u00e1 tr\u1ecb b\u1ecb thi\u1ebfu m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, gi\u00fap l\u00e0m vi\u1ec7c v\u1edbi d\u1eef li\u1ec7u trong th\u1ebf gi\u1edbi th\u1ef1c d\u1ec5 d\u00e0ng h\u01a1n.<\/li>\n<li>L\u1ecdc v\u00e0 c\u1eaft d\u1eef li\u1ec7u: Pandas cung c\u1ea5p c\u00e1c c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd \u0111\u1ec3 l\u1ecdc v\u00e0 ph\u00e2n chia d\u1eef li\u1ec7u d\u1ef1a tr\u00ean nhi\u1ec1u ti\u00eau ch\u00ed kh\u00e1c nhau, cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng tr\u00edch xu\u1ea5t c\u00e1c t\u1eadp h\u1ee3p con d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 \u0111\u1ec3 ph\u00e2n t\u00edch.<\/li>\n<li>L\u00e0m s\u1ea1ch v\u00e0 chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u: N\u00f3 cung c\u1ea5p c\u00e1c ch\u1ee9c n\u0103ng \u0111\u1ec3 l\u00e0m s\u1ea1ch v\u00e0 x\u1eed l\u00fd tr\u01b0\u1edbc d\u1eef li\u1ec7u, ch\u1eb3ng h\u1ea1n nh\u01b0 lo\u1ea1i b\u1ecf c\u00e1c b\u1ea3n sao, \u0111i\u1ec1n c\u00e1c gi\u00e1 tr\u1ecb c\u00f2n thi\u1ebfu v\u00e0 chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u gi\u1eefa c\u00e1c \u0111\u1ecbnh d\u1ea1ng kh\u00e1c nhau.<\/li>\n<li>Nh\u00f3m v\u00e0 t\u1ed5ng h\u1ee3p: Pandas h\u1ed7 tr\u1ee3 nh\u00f3m d\u1eef li\u1ec7u d\u1ef1a tr\u00ean c\u00e1c ti\u00eau ch\u00ed c\u1ee5 th\u1ec3 v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c ho\u1ea1t \u0111\u1ed9ng t\u1ed5ng h\u1ee3p, cho ph\u00e9p t\u00f3m t\u1eaft d\u1eef li\u1ec7u s\u00e2u s\u1eafc.<\/li>\n<li>H\u1ee3p nh\u1ea5t v\u00e0 n\u1ed1i d\u1eef li\u1ec7u: Ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 k\u1ebft h\u1ee3p nhi\u1ec1u t\u1eadp d\u1eef li\u1ec7u d\u1ef1a tr\u00ean c\u00e1c c\u1ed9t chung b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng Pandas, gi\u00fap thu\u1eadn ti\u1ec7n cho vi\u1ec7c t\u00edch h\u1ee3p c\u00e1c ngu\u1ed3n d\u1eef li\u1ec7u kh\u00e1c nhau.<\/li>\n<li>Ch\u1ee9c n\u0103ng chu\u1ed7i th\u1eddi gian: Pandas cung c\u1ea5p h\u1ed7 tr\u1ee3 m\u1ea1nh m\u1ebd \u0111\u1ec3 l\u00e0m vi\u1ec7c v\u1edbi d\u1eef li\u1ec7u chu\u1ed7i th\u1eddi gian, bao g\u1ed3m l\u1ea5y m\u1eabu l\u1ea1i, d\u1ecbch chuy\u1ec3n th\u1eddi gian v\u00e0 t\u00ednh to\u00e1n c\u1eeda s\u1ed5 cu\u1ed9n.<\/li>\n<\/ul>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a Pandas. C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Pandas.<\/h2>\n<p>Pandas \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng d\u1ef1a tr\u00ean NumPy, m\u1ed9t th\u01b0 vi\u1ec7n Python ph\u1ed5 bi\u1ebfn kh\u00e1c \u0111\u1ec3 t\u00ednh to\u00e1n s\u1ed1. N\u00f3 s\u1eed d\u1ee5ng m\u1ea3ng NumPy l\u00e0m ph\u1ee5 tr\u1ee3 \u0111\u1ec3 l\u01b0u tr\u1eef v\u00e0 thao t\u00e1c d\u1eef li\u1ec7u, cung c\u1ea5p c\u00e1c ho\u1ea1t \u0111\u1ed9ng d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3 v\u00e0 hi\u1ec7u su\u1ea5t cao. C\u00e1c c\u1ea5u tr\u00fac d\u1eef li\u1ec7u ch\u00ednh, S\u00ea-ri v\u00e0 Khung d\u1eef li\u1ec7u, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c t\u1eadp d\u1eef li\u1ec7u l\u1edbn m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 trong khi v\u1eabn duy tr\u00ec t\u00ednh linh ho\u1ea1t c\u1ea7n thi\u1ebft cho vi\u1ec7c ph\u00e2n t\u00edch d\u1eef li\u1ec7u.<\/p>\n<p>D\u01b0\u1edbi mui xe, Pandas s\u1eed d\u1ee5ng c\u00e1c tr\u1ee5c \u0111\u01b0\u1ee3c g\u1eafn nh\u00e3n (h\u00e0ng v\u00e0 c\u1ed9t) \u0111\u1ec3 cung c\u1ea5p m\u1ed9t c\u00e1ch nh\u1ea5t qu\u00e1n v\u00e0 c\u00f3 \u00fd ngh\u0129a \u0111\u1ec3 truy c\u1eadp v\u00e0 s\u1eeda \u0111\u1ed5i d\u1eef li\u1ec7u. Ngo\u00e0i ra, Pandas t\u1eadn d\u1ee5ng kh\u1ea3 n\u0103ng l\u1eadp ch\u1ec9 m\u1ee5c v\u00e0 ghi nh\u00e3n ph\u00e2n c\u1ea5p m\u1ea1nh m\u1ebd \u0111\u1ec3 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i cho vi\u1ec7c li\u00ean k\u1ebft v\u00e0 thao t\u00e1c d\u1eef li\u1ec7u.<\/p>\n<h2>Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a Pandas.<\/h2>\n<p>Pandas cung c\u1ea5p m\u1ed9t b\u1ed9 ch\u1ee9c n\u0103ng v\u00e0 ph\u01b0\u01a1ng ph\u00e1p phong ph\u00fa cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng th\u1ef1c hi\u1ec7n c\u00e1c t\u00e1c v\u1ee5 ph\u00e2n t\u00edch d\u1eef li\u1ec7u kh\u00e1c nhau m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. M\u1ed9t s\u1ed1 t\u00ednh n\u0103ng ch\u00ednh v\u00e0 l\u1ee3i \u00edch c\u1ee7a ch\u00fang nh\u01b0 sau:<\/p>\n<ol>\n<li>\n<p>C\u0103n ch\u1ec9nh d\u1eef li\u1ec7u v\u00e0 x\u1eed l\u00fd d\u1eef li\u1ec7u b\u1ecb thi\u1ebfu:<\/p>\n<ul>\n<li>\u0110\u1ea3m b\u1ea3o thao t\u00e1c d\u1eef li\u1ec7u nh\u1ea5t qu\u00e1n v\u00e0 \u0111\u1ed3ng b\u1ed9 tr\u00ean nhi\u1ec1u Chu\u1ed7i v\u00e0 Khung d\u1eef li\u1ec7u.<\/li>\n<li>\u0110\u01a1n gi\u1ea3n h\u00f3a qu\u00e1 tr\u00ecnh x\u1eed l\u00fd d\u1eef li\u1ec7u b\u1ecb thi\u1ebfu ho\u1eb7c kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7, gi\u1ea3m th\u1ea5t tho\u00e1t d\u1eef li\u1ec7u trong qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>L\u1ecdc v\u00e0 c\u1eaft d\u1eef li\u1ec7u:<\/p>\n<ul>\n<li>Cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng tr\u00edch xu\u1ea5t c\u00e1c t\u1eadp h\u1ee3p con d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 d\u1ef1a tr\u00ean c\u00e1c \u0111i\u1ec1u ki\u1ec7n kh\u00e1c nhau.<\/li>\n<li>T\u1ea1o \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i cho vi\u1ec7c kh\u00e1m ph\u00e1 d\u1eef li\u1ec7u v\u00e0 ki\u1ec3m tra gi\u1ea3 thuy\u1ebft b\u1eb1ng c\u00e1ch t\u1eadp trung v\u00e0o c\u00e1c ph\u00e2n \u0111o\u1ea1n d\u1eef li\u1ec7u c\u00f3 li\u00ean quan.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>L\u00e0m s\u1ea1ch v\u00e0 chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u:<\/p>\n<ul>\n<li>H\u1ee3p l\u00fd h\u00f3a quy tr\u00ecnh x\u1eed l\u00fd tr\u01b0\u1edbc d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch cung c\u1ea5p nhi\u1ec1u ch\u1ee9c n\u0103ng l\u00e0m s\u1ea1ch d\u1eef li\u1ec7u.<\/li>\n<li>C\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a d\u1eef li\u1ec7u \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 l\u1eadp m\u00f4 h\u00ecnh ti\u1ebfp theo.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>Nh\u00f3m v\u00e0 t\u1ed5ng h\u1ee3p:<\/p>\n<ul>\n<li>Cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng t\u00f3m t\u1eaft d\u1eef li\u1ec7u v\u00e0 t\u00ednh to\u00e1n s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea t\u1ed5ng h\u1ee3p m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/li>\n<li>H\u1ed7 tr\u1ee3 t\u00f3m t\u1eaft d\u1eef li\u1ec7u s\u00e2u s\u1eafc v\u00e0 kh\u00e1m ph\u00e1 m\u1eabu.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>H\u1ee3p nh\u1ea5t v\u00e0 n\u1ed1i d\u1eef li\u1ec7u:<\/p>\n<ul>\n<li>\u0110\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c t\u00edch h\u1ee3p nhi\u1ec1u b\u1ed9 d\u1eef li\u1ec7u d\u1ef1a tr\u00ean c\u00e1c kh\u00f3a ho\u1eb7c c\u1ed9t chung.<\/li>\n<li>Cho ph\u00e9p ph\u00e2n t\u00edch d\u1eef li\u1ec7u to\u00e0n di\u1ec7n b\u1eb1ng c\u00e1ch k\u1ebft h\u1ee3p th\u00f4ng tin t\u1eeb nhi\u1ec1u ngu\u1ed3n kh\u00e1c nhau.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>Ch\u1ee9c n\u0103ng chu\u1ed7i th\u1eddi gian:<\/p>\n<ul>\n<li>T\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho vi\u1ec7c ph\u00e2n t\u00edch, d\u1ef1 b\u00e1o v\u00e0 x\u00e1c \u0111\u1ecbnh xu h\u01b0\u1edbng d\u1ef1a tr\u00ean th\u1eddi gian.<\/li>\n<li>N\u00e2ng cao kh\u1ea3 n\u0103ng th\u1ef1c hi\u1ec7n c\u00e1c ph\u00e9p t\u00ednh v\u00e0 so s\u00e1nh ph\u1ee5 thu\u1ed9c v\u00e0o th\u1eddi gian.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2>C\u00e1c lo\u1ea1i g\u1ea5u tr\u00fac v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a ch\u00fang<\/h2>\n<p>Pandas cung c\u1ea5p hai c\u1ea5u tr\u00fac d\u1eef li\u1ec7u ch\u00ednh:<\/p>\n<ol>\n<li>\n<p>Lo\u1ea1t:<\/p>\n<ul>\n<li>M\u1ea3ng \u0111\u01b0\u1ee3c g\u1eafn nh\u00e3n m\u1ed9t chi\u1ec1u c\u00f3 kh\u1ea3 n\u0103ng ch\u1ee9a d\u1eef li\u1ec7u thu\u1ed9c b\u1ea5t k\u1ef3 lo\u1ea1i n\u00e0o (v\u00ed d\u1ee5: s\u1ed1 nguy\u00ean, chu\u1ed7i, s\u1ed1 float).<\/li>\n<li>M\u1ed7i ph\u1ea7n t\u1eed trong Chu\u1ed7i \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi m\u1ed9t ch\u1ec9 m\u1ee5c, cung c\u1ea5p kh\u1ea3 n\u0103ng truy c\u1eadp d\u1eef li\u1ec7u nhanh ch\u00f3ng v\u00e0 hi\u1ec7u qu\u1ea3.<\/li>\n<li>L\u00fd t\u01b0\u1edfng \u0111\u1ec3 bi\u1ec3u di\u1ec5n d\u1eef li\u1ec7u chu\u1ed7i th\u1eddi gian, chu\u1ed7i ho\u1eb7c c\u00e1c c\u1ed9t \u0111\u01a1n t\u1eeb DataFrame.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>Khung d\u1eef li\u1ec7u:<\/p>\n<ul>\n<li>C\u1ea5u tr\u00fac d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c g\u1eafn nh\u00e3n hai chi\u1ec1u v\u1edbi c\u00e1c h\u00e0ng v\u00e0 c\u1ed9t, gi\u1ed1ng nh\u01b0 b\u1ea3ng t\u00ednh ho\u1eb7c b\u1ea3ng SQL.<\/li>\n<li>H\u1ed7 tr\u1ee3 c\u00e1c ki\u1ec3u d\u1eef li\u1ec7u kh\u00f4ng \u0111\u1ed3ng nh\u1ea5t cho t\u1eebng c\u1ed9t, ch\u1ee9a c\u00e1c b\u1ed9 d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p.<\/li>\n<li>Cung c\u1ea5p kh\u1ea3 n\u0103ng thao t\u00e1c, l\u1ecdc v\u00e0 t\u1ed5ng h\u1ee3p d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2>C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng Pandas, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng.<\/h2>\n<p>Pandas \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng v\u00e0 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng kh\u00e1c nhau:<\/p>\n<ol>\n<li>\n<p>L\u00e0m s\u1ea1ch v\u00e0 ti\u1ec1n x\u1eed l\u00fd d\u1eef li\u1ec7u:<\/p>\n<ul>\n<li>Pandas \u0111\u01a1n gi\u1ea3n h\u00f3a qu\u00e1 tr\u00ecnh d\u1ecdn d\u1eb9p v\u00e0 chuy\u1ec3n \u0111\u1ed5i c\u00e1c t\u1eadp d\u1eef li\u1ec7u l\u1ed9n x\u1ed9n, ch\u1eb3ng h\u1ea1n nh\u01b0 x\u1eed l\u00fd c\u00e1c gi\u00e1 tr\u1ecb b\u1ecb thi\u1ebfu v\u00e0 c\u00e1c gi\u00e1 tr\u1ecb ngo\u1ea1i l\u1ec7.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>Ph\u00e2n t\u00edch d\u1eef li\u1ec7u th\u0103m d\u00f2 (EDA):<\/p>\n<ul>\n<li>EDA li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng Pandas \u0111\u1ec3 kh\u00e1m ph\u00e1 v\u00e0 tr\u1ef1c quan h\u00f3a d\u1eef li\u1ec7u, x\u00e1c \u0111\u1ecbnh c\u00e1c m\u1eabu v\u00e0 m\u1ed1i quan h\u1ec7 tr\u01b0\u1edbc khi ph\u00e2n t\u00edch chuy\u00ean s\u00e2u.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>S\u1eafp x\u1ebfp v\u00e0 chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u:<\/p>\n<ul>\n<li>Pandas cho ph\u00e9p \u0111\u1ecbnh h\u00ecnh l\u1ea1i v\u00e0 \u0111\u1ecbnh d\u1ea1ng l\u1ea1i d\u1eef li\u1ec7u \u0111\u1ec3 chu\u1ea9n b\u1ecb cho vi\u1ec7c l\u1eadp m\u00f4 h\u00ecnh v\u00e0 ph\u00e2n t\u00edch.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>T\u1ed5ng h\u1ee3p d\u1eef li\u1ec7u v\u00e0 b\u00e1o c\u00e1o:<\/p>\n<ul>\n<li>Pandas r\u1ea5t h\u1eefu \u00edch trong vi\u1ec7c t\u00f3m t\u1eaft v\u00e0 t\u1ed5ng h\u1ee3p d\u1eef li\u1ec7u \u0111\u1ec3 t\u1ea1o b\u00e1o c\u00e1o v\u00e0 hi\u1ec3u r\u00f5 h\u01a1n.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>Ph\u00e2n t\u00edch chu\u1ed7i th\u1eddi gian:<\/p>\n<ul>\n<li>Pandas h\u1ed7 tr\u1ee3 nhi\u1ec1u ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean th\u1eddi gian kh\u00e1c nhau, khi\u1ebfn n\u00f3 ph\u00f9 h\u1ee3p cho vi\u1ec7c d\u1ef1 b\u00e1o v\u00e0 ph\u00e2n t\u00edch chu\u1ed7i th\u1eddi gian.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>C\u00e1c v\u1ea5n \u0111\u1ec1 th\u01b0\u1eddng g\u1eb7p v\u00e0 gi\u1ea3i ph\u00e1p c\u1ee7a h\u1ecd:<\/p>\n<ol>\n<li>\n<p>X\u1eed l\u00fd d\u1eef li\u1ec7u b\u1ecb thi\u1ebfu:<\/p>\n<ul>\n<li>S\u1eed d\u1ee5ng c\u00e1c ch\u1ee9c n\u0103ng nh\u01b0 <code data-no-translation=\"\">dropna()<\/code> ho\u1eb7c <code data-no-translation=\"\">fillna()<\/code> \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c gi\u00e1 tr\u1ecb c\u00f2n thi\u1ebfu trong t\u1eadp d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>H\u1ee3p nh\u1ea5t v\u00e0 n\u1ed1i d\u1eef li\u1ec7u:<\/p>\n<ul>\n<li>Thu\u00ea <code data-no-translation=\"\">merge()<\/code> ho\u1eb7c <code data-no-translation=\"\">join()<\/code> ch\u1ee9c n\u0103ng k\u1ebft h\u1ee3p nhi\u1ec1u t\u1eadp d\u1eef li\u1ec7u d\u1ef1a tr\u00ean c\u00e1c kh\u00f3a ho\u1eb7c c\u1ed9t chung.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>L\u1ecdc v\u00e0 c\u1eaft d\u1eef li\u1ec7u:<\/p>\n<ul>\n<li>S\u1eed d\u1ee5ng l\u1eadp ch\u1ec9 m\u1ee5c c\u00f3 \u0111i\u1ec1u ki\u1ec7n v\u1edbi m\u1eb7t n\u1ea1 boolean \u0111\u1ec3 l\u1ecdc v\u00e0 tr\u00edch xu\u1ea5t c\u00e1c t\u1eadp h\u1ee3p con d\u1eef li\u1ec7u c\u1ee5 th\u1ec3.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>Nh\u00f3m v\u00e0 t\u1ed5ng h\u1ee3p:<\/p>\n<ul>\n<li>S\u1eed d\u1ee5ng <code data-no-translation=\"\">groupby()<\/code> v\u00e0 c\u00e1c h\u00e0m t\u1ed5ng h\u1ee3p \u0111\u1ec3 nh\u00f3m d\u1eef li\u1ec7u v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c thao t\u00e1c tr\u00ean c\u00e1c nh\u00f3m.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 so s\u00e1nh kh\u00e1c v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u0111\u1eb7c tr\u01b0ng<\/th>\n<th>g\u1ea5u tr\u00fac<\/th>\n<th>NumPy<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>C\u1ea5u tr\u00fac d\u1eef li\u1ec7u<\/td>\n<td>Chu\u1ed7i, Khung d\u1eef li\u1ec7u<\/td>\n<td>M\u1ea3ng \u0111a chi\u1ec1u (ndarray)<\/td>\n<\/tr>\n<tr>\n<td>C\u00e1ch d\u00f9ng th\u00f4ng th\u01b0\u1eddng<\/td>\n<td>Thao t\u00e1c, ph\u00e2n t\u00edch d\u1eef li\u1ec7u<\/td>\n<td>T\u00ednh to\u00e1n s\u1ed1<\/td>\n<\/tr>\n<tr>\n<td>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh<\/td>\n<td>C\u0103n ch\u1ec9nh d\u1eef li\u1ec7u, X\u1eed l\u00fd d\u1eef li\u1ec7u b\u1ecb thi\u1ebfu, H\u1ed7 tr\u1ee3 chu\u1ed7i th\u1eddi gian<\/td>\n<td>C\u00e1c ph\u00e9p to\u00e1n s\u1ed1, h\u00e0m to\u00e1n h\u1ecdc<\/td>\n<\/tr>\n<tr>\n<td>Hi\u1ec7u su\u1ea5t<\/td>\n<td>T\u1ed1c \u0111\u1ed9 v\u1eeba ph\u1ea3i cho t\u1eadp d\u1eef li\u1ec7u l\u1edbn<\/td>\n<td>Hi\u1ec7u su\u1ea5t cao cho c\u00e1c ph\u00e9p to\u00e1n s\u1ed1<\/td>\n<\/tr>\n<tr>\n<td>Uy\u1ec3n chuy\u1ec3n<\/td>\n<td>H\u1ed7 tr\u1ee3 c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u h\u1ed7n h\u1ee3p v\u00e0 b\u1ed9 d\u1eef li\u1ec7u kh\u00f4ng \u0111\u1ed3ng nh\u1ea5t<\/td>\n<td>\u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf cho d\u1eef li\u1ec7u s\u1ed1 \u0111\u1ed3ng nh\u1ea5t<\/td>\n<\/tr>\n<tr>\n<td>\u1ee8ng d\u1ee5ng<\/td>\n<td>Ph\u00e2n t\u00edch d\u1eef li\u1ec7u chung<\/td>\n<td>T\u00ednh to\u00e1n khoa h\u1ecdc, nhi\u1ec7m v\u1ee5 to\u00e1n h\u1ecdc<\/td>\n<\/tr>\n<tr>\n<td>C\u00e1ch s\u1eed d\u1ee5ng<\/td>\n<td>L\u00e0m s\u1ea1ch d\u1eef li\u1ec7u, EDA, chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u<\/td>\n<td>T\u00ednh to\u00e1n, \u0111\u1ea1i s\u1ed1 tuy\u1ebfn t\u00ednh<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn Pandas.<\/h2>\n<p>Khi c\u00f4ng ngh\u1ec7 v\u00e0 khoa h\u1ecdc d\u1eef li\u1ec7u ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, t\u01b0\u01a1ng lai c\u1ee7a Pandas c\u00f3 v\u1ebb \u0111\u1ea7y h\u1ee9a h\u1eb9n. M\u1ed9t s\u1ed1 ph\u00e1t tri\u1ec3n v\u00e0 xu h\u01b0\u1edbng ti\u1ec1m n\u0103ng bao g\u1ed3m:<\/p>\n<ol>\n<li>\n<p>C\u1ea3i ti\u1ebfn hi\u1ec7u su\u1ea5t:<\/p>\n<ul>\n<li>T\u1ed1i \u01b0u h\u00f3a v\u00e0 song song h\u00f3a h\u01a1n n\u1eefa \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c t\u1eadp d\u1eef li\u1ec7u l\u1edbn h\u01a1n m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>T\u00edch h\u1ee3p v\u1edbi AI v\u00e0 ML:<\/p>\n<ul>\n<li>T\u00edch h\u1ee3p li\u1ec1n m\u1ea1ch v\u1edbi c\u00e1c th\u01b0 vi\u1ec7n m\u00e1y h\u1ecdc \u0111\u1ec3 h\u1ee3p l\u00fd h\u00f3a quy tr\u00ecnh l\u1eadp m\u00f4 h\u00ecnh v\u00e0 ti\u1ec1n x\u1eed l\u00fd d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>Kh\u1ea3 n\u0103ng tr\u1ef1c quan n\u00e2ng cao:<\/p>\n<ul>\n<li>T\u00edch h\u1ee3p v\u1edbi c\u00e1c th\u01b0 vi\u1ec7n tr\u1ef1c quan h\u00f3a n\u00e2ng cao \u0111\u1ec3 cho ph\u00e9p kh\u00e1m ph\u00e1 d\u1eef li\u1ec7u t\u01b0\u01a1ng t\u00e1c.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>Gi\u1ea3i ph\u00e1p d\u1ef1a tr\u00ean \u0111\u00e1m m\u00e2y:<\/p>\n<ul>\n<li>T\u00edch h\u1ee3p v\u1edbi n\u1ec1n t\u1ea3ng \u0111\u00e1m m\u00e2y \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 c\u1ed9ng t\u00e1c d\u1eef li\u1ec7u c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi Pandas.<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy v\u00e0 Panda c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c li\u00ean k\u1ebft theo nhi\u1ec1u c\u00e1ch kh\u00e1c nhau, \u0111\u1eb7c bi\u1ec7t khi x\u1eed l\u00fd c\u00e1c t\u00e1c v\u1ee5 qu\u00e9t web v\u00e0 tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u. M\u00e1y ch\u1ee7 proxy \u0111\u00f3ng vai tr\u00f2 trung gian gi\u1eefa m\u00e1y kh\u00e1ch (m\u00e1y qu\u00e9t web) v\u00e0 m\u00e1y ch\u1ee7 l\u01b0u tr\u1eef trang web \u0111ang \u0111\u01b0\u1ee3c qu\u00e9t. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u00e1y ch\u1ee7 proxy, ng\u01b0\u1eddi qu\u00e9t web c\u00f3 th\u1ec3 ph\u00e2n ph\u1ed1i y\u00eau c\u1ea7u c\u1ee7a h\u1ecd tr\u00ean nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IP, gi\u1ea3m nguy c\u01a1 b\u1ecb ch\u1eb7n b\u1edfi c\u00e1c trang web \u00e1p \u0111\u1eb7t h\u1ea1n ch\u1ebf truy c\u1eadp.<\/p>\n<p>Trong b\u1ed1i c\u1ea3nh c\u1ee7a Pandas, ng\u01b0\u1eddi qu\u00e9t web c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u00e1y ch\u1ee7 proxy \u0111\u1ec3 t\u00ecm n\u1ea1p d\u1eef li\u1ec7u t\u1eeb nhi\u1ec1u ngu\u1ed3n c\u00f9ng m\u1ed9t l\u00fac, do \u0111\u00f3 t\u0103ng hi\u1ec7u qu\u1ea3 thu th\u1eadp d\u1eef li\u1ec7u. Ngo\u00e0i ra, xoay v\u00f2ng proxy c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tri\u1ec3n khai \u0111\u1ec3 ng\u0103n ch\u1eb7n c\u00e1c h\u1ea1n ch\u1ebf truy c\u1eadp v\u00e0 ch\u1eb7n d\u1ef1a tr\u00ean IP do c\u00e1c trang web \u00e1p \u0111\u1eb7t.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 Pandas, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n<ul>\n<li><a href=\"https:\/\/pandas.pydata.org\/docs\/\" target=\"_new\" rel=\"noopener nofollow\">T\u00e0i li\u1ec7u ch\u00ednh th\u1ee9c v\u1ec1 g\u1ea5u tr\u00fac<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/pandas-dev\/pandas\" target=\"_new\" rel=\"noopener nofollow\">Kho l\u01b0u tr\u1eef Pandas GitHub<\/a><\/li>\n<li><a href=\"https:\/\/pandas.pydata.org\/pandas-docs\/stable\/getting_started\/index.html\" target=\"_new\" rel=\"noopener nofollow\">H\u01b0\u1edbng d\u1eabn v\u00e0 h\u01b0\u1edbng d\u1eabn v\u1ec1 Pandas<\/a><\/li>\n<li><a href=\"https:\/\/stackoverflow.com\/questions\/tagged\/pandas\" target=\"_new\" rel=\"noopener nofollow\">G\u1ea5u tr\u00fac tr\u00ean Stack Overflow<\/a> (\u0111\u1ec3 h\u1ecfi \u0111\u00e1p c\u1ed9ng \u0111\u1ed3ng)<\/li>\n<li><a href=\"https:\/\/www.datacamp.com\/community\/tutorials\/pandas-tutorial-dataframe-python\" target=\"_new\" rel=\"noopener nofollow\">H\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng DataCamp Pandas<\/a><\/li>\n<\/ul>\n<p>T\u00f3m l\u1ea1i, Pandas \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u v\u00e0 nh\u00e0 khoa h\u1ecdc nh\u1edd kh\u1ea3 n\u0103ng thao t\u00e1c d\u1eef li\u1ec7u tr\u1ef1c quan v\u00e0 ch\u1ee9c n\u0103ng m\u1edf r\u1ed9ng. S\u1ef1 ph\u00e1t tri\u1ec3n v\u00e0 t\u00edch h\u1ee3p li\u00ean t\u1ee5c c\u1ee7a n\u00f3 v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 ti\u00ean ti\u1ebfn \u0111\u1ea3m b\u1ea3o t\u00ednh ph\u00f9 h\u1ee3p v\u00e0 t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3 trong t\u01b0\u01a1ng lai c\u1ee7a vi\u1ec7c ph\u00e2n t\u00edch d\u1eef li\u1ec7u v\u00e0 ra quy\u1ebft \u0111\u1ecbnh d\u1ef1a tr\u00ean d\u1eef li\u1ec7u. Cho d\u00f9 b\u1ea1n l\u00e0 m\u1ed9t nh\u00e0 khoa h\u1ecdc d\u1eef li\u1ec7u \u0111\u1ea7y tham v\u1ecdng hay m\u1ed9t nh\u00e0 nghi\u00ean c\u1ee9u gi\u00e0u kinh nghi\u1ec7m, Pandas l\u00e0 t\u00e0i s\u1ea3n qu\u00fd gi\u00e1 gi\u00fap b\u1ea1n khai th\u00e1c ti\u1ec1m n\u0103ng ti\u1ec1m \u1ea9n trong d\u1eef li\u1ec7u c\u1ee7a m\u00ecnh.<\/p>","protected":false},"featured_media":469107,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-478331","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Pandas: A Comprehensive Guide<\/mark>","faq_items":[{"question":"What is Pandas and why is it popular for data analysis?","answer":"<p>Pandas is an open-source Python library that provides powerful tools for data manipulation and analysis. It is popular because of its ease of use, flexibility, and efficient handling of structured data. With Pandas, data scientists and analysts can perform various data tasks, such as cleaning, filtering, grouping, and aggregation, with just a few lines of code.<\/p>"},{"question":"Who created Pandas and when was it first released?","answer":"<p>Pandas was created by Wes McKinney, a financial analyst at AQR Capital Management, in 2008. The first version of Pandas was released in January 2009.<\/p>"},{"question":"What are the key data structures in Pandas?","answer":"<p>Pandas offers two primary data structures: Series and DataFrame. Series is a one-dimensional labeled array, and DataFrame is a two-dimensional labeled data structure with rows and columns, similar to a spreadsheet.<\/p>"},{"question":"How does Pandas handle missing data?","answer":"<p>Pandas provides efficient tools to handle missing data. Users can use functions like <code>dropna()<\/code> or <code>fillna()<\/code> to remove or fill missing values in the dataset, ensuring data integrity during analysis.<\/p>"},{"question":"What are the key features of Pandas?","answer":"<p>Pandas offers several essential features, including data alignment, missing data handling, data filtering and slicing, data cleaning and transformation, grouping and aggregation, merging and joining data, and time series functionality.<\/p>"},{"question":"How can Pandas be used for web scraping?","answer":"<p>Proxy servers can be associated with Pandas for web scraping tasks. By using proxy servers, web scrapers can distribute their requests across multiple IP addresses, reducing the risk of being blocked by websites that impose access restrictions.<\/p>"},{"question":"What are the future perspectives of Pandas?","answer":"<p>In the future, Pandas is expected to witness performance improvements, better integration with AI and ML libraries, enhanced visualization capabilities, and potential integration with cloud platforms for scalable data analysis.<\/p>"},{"question":"Where can I find more information about Pandas?","answer":"<p>For more information about Pandas, you can refer to the official Pandas documentation, GitHub repository, tutorials, and guides available on the Pandas website. Additionally, you can explore the Pandas-related discussions on Stack Overflow and DataCamp's Pandas tutorial for in-depth learning.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/478331","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/478331\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/469107"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=478331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}