[問題] %in% 指令請益

看板R_Language作者remember69 (大俠好帥)時間10年前 (2015/08/10 11:28)推噓2(2推 0噓 15→)

留言17則, 4人參與討論串1/1

[問題類型]: 如題 [軟體熟悉度]: 新手,接觸R約兩個月 [問題敘述]: 本人目前在練習data mining,手邊有個app click log的資料格式如下 uid system command DataTimes 1 ios 0 2013/5/7 10:44 1 ios 10 2013/5/7 10:45 2 android 0 2013/5/7 10:50 2 android 10 2013/5/7 10:51 3 ios 0 2013/5/7 10:58 3 ios 20 2013/5/7 10:59 . . . 想請問因為我要把整筆資料操作次數過少的使用者清掉於是我整理了一個uidlist 是click次數超過n次的uidlist 之後我做了下面這個指令 data1 <- data[data$uid %in% uidlist,] 點開data1確實留下click次數超過n的資料但我後來輸入 barchart(data1$uid) 顯示出的長條圖中被移除的uid還是存在有點像是 uid 1 ============ 2 ==== 3 = 4 5 =================== 6 7 === 8 = 9 ======= 0 5 10 Feq 像uid 4跟6明明被移掉了卻還是會顯示不知道為何想請問為什會這樣及如何確實移除? 如有描述不清楚或不完全,我會立即補充謝謝!! [環境敘述]: R version 3.2.1 (2015-06-18) Platform: x86_64-w64-mingw32/x64 (64-bit) Running under: Windows 7 x64 (build 7601) Service Pack 1 locale: [1] LC_COLLATE=Chinese (Traditional)_Taiwan.950 [2] LC_CTYPE=Chinese (Traditional)_Taiwan.950 [3] LC_MONETARY=Chinese (Traditional)_Taiwan.950 [4] LC_NUMERIC=C [5] LC_TIME=Chinese (Traditional)_Taiwan.950 attached base packages: [1] stats graphics grDevices utils datasets methods [7] base other attached packages: [1] lattice_0.20-31 arules_1.1-9 Matrix_1.2-1 loaded via a namespace (and not attached): [1] tools_3.2.1 grid_3.2.1 [關鍵字]: -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 140.96.194.58 ※ 文章網址: https://www.ptt.cc/bbs/R_Language/M.1439177335.A.663.html

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andrew43

08/10 11:48, , 1^F

08/10 11:48, 1^F

我剛剛試了,但不太了解droplevels的意思...

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celestialgod

08/10 11:59, , 2^F

08/10 11:59, 2^F

dd1 <- table(data2$uid) names(dd1) dfuid <- data.frame(uid= names(dd1), idcnt = dd1) names(dfuid) <- c("uid", "uid2", "idcnt") dfuid <- dfuid[, c("uid", "idcnt")] ss <- summary(dfuid$idcnt) str(ss) threshold1 <- ss[[2]] dfuid2 <- dfuid[dfuid$idcnt >= threshold1, ] summary(dfuid2$idcnt) uidlist <- dfuid2$uid >uidlist [1] 122164545fwsewe 1125rwe60c02d25f2 . . .(滿滿的uid) . . [57]re98635rtg546re5 5t65e4rt4e6rt4e 78 Levels: 122164545fwsewe 1125rwe60c02d25f2 1805ea5f796f6034 ... mdend5ihiqwtn6yri5h7kurkx9ypajutfx 這個嗎? ※ 編輯: remember69 (140.96.194.58), 08/10/2015 13:39:28

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celestialgod

08/10 14:03, , 3^F

08/10 14:03, 3^F

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celestialgod

08/10 14:03, , 4^F

08/10 14:03, 4^F

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celestialgod

08/10 14:03, , 5^F

08/10 14:03, 5^F