[关键字]: tidyr [出处]: http://www.r-bloggers.com/tidyr-0-5-0/ [重点摘要]: 重点功能之一，也是我觉得有兴趣的XD： separate_rows() separates values that contain multiple values separated by a delimited into multiple rows. Thanks to Aaron Wolen for the contribution! df <- data_frame(x = 1:2, y = c("a,b", "d,e,f")) df %>% separate_rows(y, sep = ",") #> Source: local data frame [5 x 2] #> #> x y #> <int> <chr> #> 1 1 a #> 2 1 b #> 3 2 d #> 4 2 e #> 5 2 f Compare with separate() which separates into (named) columns: df %>% separate(y, c("y1", "y2", "y3"), sep = ",", fill = "right") #> Source: local data frame [2 x 4] #> #> x y1 y2 y3 #> * <int> <chr> <chr> <chr> #> 1 1 a b <NA> #> 2 2 d e f --

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