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2019-03-10 閱讀量: 1720
R語(yǔ)言中元素的翻轉(zhuǎn)

rev

元素間翻轉(zhuǎn)

> x <- c(1:5, 5:3)

> x

[1] 1 2 3 4 5 5 4 3

> rev(x)

[1] 3 4 5 5 4 3 2 1

> x <- c("ABC", "DEF", "GHIJ")

> rev(x)

[1] "GHIJ" "DEF" "ABC"

str_rev

元素內(nèi)翻轉(zhuǎn)

> install.packages("Kmisc")

> library(Kmisc)

> x <- c("ABC", "DEF", "GHIJ")

> x

[1] "ABC" "DEF" "GHIJ"

> str_rev(x)

[1] "CBA" "FED" "JIHG"

> x <- c(1:5, 5:3)

> x

[1] 1 2 3 4 5 5 4 3

> str_rev(x)

[1] "1" "2" "3" "4" "5" "5" "4" "3"

> x <- "I am here."

> x

[1] "I am here."

> str_rev(x)

[1] ".ereh ma I"

> rev(x)

[1] "I am here."

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