可以阅读《R 数据科学》查看完整教程。...《R 数据科学》电子书:https://r4ds.had.co.nz/
tidyverse 包重构了 R 语言处理数据的语法,比默认的 R 函数更加方便,相当于一套新的语法,使用起来更加方便...<- data.frame(x = c(NA, "a.b", "a.d", "b.c"))
df
separate(df,col=x,into = c("A","B"))
df <- data.frame...pivot_longer(table4a, cols = 2:3, names_to ="year",values_to = "cases")
pivot_wider(x, names_from = year,values_from...= cases)
table2
pivot_wider(table2, names_from = type,values_from = count)
billboard
pivot_longer(billboard