討論串[問題] 整理資料
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提供四種解法:. dataMat <- matrix(c("S11","R1","O11",. "S11","R2","O12",. "O11","R3","O12",. "S21","R1","O21",. "S21","R2","O22",. "O21","R3","O22",. "S11","
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[問題類型]:. 效能諮詢(我想讓R 跑更快). [軟體熟悉度]:. 使用者(已經有用R 做過不少作品). [問題敘述]:. 整理資料 不使用for loop. [程式範例]:. 資料如下:. data <- matrix(c("S11","R1","O11",. "S11","R2","O12",
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