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法律研究如何在 R 中提取拆分字串的元素？
要分割字串向量元素，我們可以使用 strsplit 函式。如果我們要在分割後提取字串元素，那麼將使用雙方括號和單方括號。雙方括號將提取字串向量元素，單方括號將提取分割後的元素。檢視示例以瞭解其工作原理。
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輸出
[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
輸出
[[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輸出
[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
輸出
[[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]
輸出
[1] "The" [1] "purpose" [1] "Sometimes" [1] "best" [1] "Life" [1] "The" [1] "dream"
更新於： 2021 年 3 月 4 日
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