数据结构
网络
RDBMS
操作系统
Java
MS Excel
iOS
HTML
CSS
Android
Python
C 编程
C++
C#
MongoDB
MySQL
Javascript
PHP
物理学
化学
生物
数学
英语
经济学
心理学
社会研究
时尚研究
法律研究如何在 R 中提取拆分字符串的元素？
要分割字符串向量元素，我们可以使用 strsplit 函数。如果我们要在分割后提取字符串元素，那么将使用双方括号和单方括号。双方括号将提取字符串向量元素，单方括号将提取分割后的元素。查看示例以了解其工作原理。
示例 1
> x1<-c("Tutorialspoint is an E-learning platform","E-learning is important","It helps in learning and growing at a faster rate")
> x1输出
[1] "Tutorialspoint is an E-learning platform" [2] "E-learning is important" [3] "It helps in learning and growing at a faster rate"
示例
> x1<-strsplit(x1," ") > x1
输出
[[1]] [1] "Tutorialspoint" "is" "an" "E-learning" [5] "platform" [[2]] [1] "E-learning" "is" "important" [[3]] [1] "It" "helps" "in" "learning" "and" "growing" [7] "at" "a" "faster" "rate"
示例
> x1[[1]][1] [1] "Tutorialspoint" > x1[[1]][4] [1] "E-learning" > x1[[2]][1] [1] "E-learning" > x1[[3]][1] [1] "It" > x1[[3]][4] [1] "learning" > x1[[3]][8] [1] "a"
示例 2
> x2<-c("The purpose of our lives is to be happy","Difficult roads often lead to beautiful destinations","Sometimes the heart sees what is invisible to the eye","Life is beautiful","God is the greatest","Don't let yesterday take up too much today","Clarity is very important","Satisfaction defines the success","My life is my message","The best is yet to come","Life is a journey not a race","Life is short and the world is wide","Time is free but it's priceless","Your dream does not have an expiration date")
> x2输出
[1] "The purpose of our lives is to be happy" [2] "Difficult roads often lead to beautiful destinations" [3] "Sometimes the heart sees what is invisible to the eye" [4] "Life is beautiful" [5] "God is the greatest" [6] "Don't let yesterday take up too much today" [7] "Clarity is very important" [8] "Satisfaction defines the success" [9] "My life is my message" [10] "The best is yet to come" [11] "Life is a journey not a race" [12] "Life is short and the world is wide" [13] "Time is free but it's priceless" [14] "Your dream does not have an expiration date"
示例
> x2<-strsplit(x2," ") > x2
输出
[[1]] [1] "The" "purpose" "of" "our" "lives" "is" "to" [8] "be" "happy" [[2]] [1] "Difficult" "roads" "often" "lead" "to" [6] "beautiful" "destinations" [[3]] [1] "Sometimes" "the" "heart" "sees" "what" "is" [7] "invisible" "to" "the" "eye" [[4]] [1] "Life" "is" "beautiful" [[5]] [1] "God" "is" "the" "greatest" [[6]] [1] "Don't" "let" "yesterday" "take" "up" "too" [7] "much" "today" [[7]] [1] "Clarity" "is" "very" "important" [[8]] [1] "Satisfaction" "defines" "the" "success" [[9]] [1] "My" "life" "is" "my" "message" [[10]] [1] "The" "best" "is" "yet" "to" "come" [[11]] [1] "Life" "is" "a" "journey" "not" "a" "race" [[12]] [1] "Life" "is" "short" "and" "the" "world" "is" "wide" [[13]] [1] "Time" "is" "free" "but" "it's" "priceless" [[14]] [1] "Your" "dream" "does" "not" "have" [6] "an" "expiration" "date"
示例
> x2[[1]][1] > x2[[1]][2] > x2[[3]][1] > x2[[10]][2] > x2[[12]][1] > x2[[10]][1] > x2[[14]][2]
输出
[1] "The" [1] "purpose" [1] "Sometimes" [1] "best" [1] "Life" [1] "The" [1] "dream"
更新于： 2021 年 3 月 4 日
2000 多次浏览
广告