Fw: [程式] a[order(a[,1]),] 排序與延伸選取範圍

看板R_Language作者gsuper (Logit(odds))時間11年前 (2013/03/30 20:35)推噓0(0推 0噓 0→)

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※ [本文轉錄自 Statistics 看板 #1D3WQWHH ] 作者: gsuper (統計的巴比倫塔) 看板: Statistics 標題: [程式] a[order(a[,1]),] 的問題時間: Sun Dec 19 21:20:29 2010 D_ID SNP_ID fac RACE CHR CHR_LOCATION MARKER_EFFECT HAN_ABLE 131 "0" "12061474" "0_12061474" "CEU" "1" "202655937" "RISK" "0.922" 195 "0" "2476601" "0_2476601" "CEU" "1" "114179091" "PROTECTIVE" "0.057" 126 "0" "3741208" "0_3741208" "CEU" "11" "2126350" "PROTECTIVE" "0.167" 278 "0" "1701704" "0_1701704" "CEU" "12" "54698754" "PROTECTIVE" "0.278" 123 "0" "2292239" "0_2292239" "CEU" "12" "54768447" "PROTECTIVE" "0.256" 127 "0" "3764021" "0_3764021" "CEU" "12" "9724895" "RISK" "0.700" 197 "0" "17673553" "0_17673553" "CEU" "16" "11149407" "RISK" "0.884" 196 "0" "2903692" "0_2903692" "CEU" "16" "11146284" "RISK" "0.733" 194 "0" "725613" "0_725613" "CEU" "16" "11077184" "RISK" "0.756" 121 "0" "1893217" "0_1893217" "CEU" "18" "12799340" "PROTECTIVE" "0.189" 122 "0" "1990760" "0_1990760" "CEU" "2" "162832297" "RISK" "0.689" 125 "0" "3087243" "0_3087243" "CEU" "2" "204447164" "RISK" "0.789" 133 "0" "17388568" "0_17388568" "CEU" "4" "123548812" "PROTECTIVE" "0.111" ---------------------------------------------------------- 我現在想要做的事情是先按照 D_ID 排序然後再按照 CHR 排序再按照 CHR_LOCATION 排序我想了很久還是不知道要怎麼寫最好當然用3個迴圈和一堆判斷式是可以做但我想是不是有甚麼更簡單的寫法可以用請教各位程式高手是否有較簡單的寫法? ----------------------------------------------------------- 順便講一下第三個 column 是我最近想出來的一種很不錯的寫法在跨多張 table 處理資料又需要有個 Primary Key 的時候很好用簡單來說就是建 index , R 的 index array 超好用有興趣的人可以參考一下 -- -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.113.239.247 ※ 編輯: gsuper 來自: 140.113.239.247 (12/19 21:20) ※ 編輯: gsuper 來自: 140.113.239.247 (12/19 21:21) ※ 編輯: gsuper 來自: 140.113.239.247 (12/19 21:22) ※ 編輯: gsuper 來自: 140.113.239.247 (12/19 21:26) ※ 編輯: gsuper 來自: 140.113.239.247 (12/19 21:30)

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bmka

12/19 21:44, , 1^F

12/19 21:44, 1^F

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bmka

12/19 21:46, , 2^F

12/19 21:46, 2^F

自問自答 order 可以這樣用 order(tmp[,"CHR"],tmp[,"CHR_LOCATION"]) 把比較重要的排前面就可以了 ※ 編輯: gsuper 來自: 140.113.239.247 (12/19 21:59) http://stackoverflow.com/questions/1296646/ how-to-sort-a-dataframe-by-columns-in-r 這裡還有另外5種方法 B大提到的的 doBy 也在裡面 ※ 編輯: gsuper 來自: 140.113.239.247 (12/19 22:03) ※ 編輯: gsuper 來自: 140.113.239.247 (12/19 22:04)