1、R語(yǔ)言strsplit用于分割字符串
創(chuàng)建測(cè)試數(shù)據(jù)
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> test <- "aa bb cc dd ee ff" ##創(chuàng)建測(cè)試數(shù)據(jù)> test[1] "aa bb cc dd ee ff"> class(test) ## 測(cè)試數(shù)據(jù)為字符[1] "character" |
2、按照指定分隔符拆分字符串
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> a <- strsplit(test,split = " ") ##制動(dòng)分隔符為空格進(jìn)行拆分?jǐn)?shù)據(jù)> a[[1]][1] "aa" "bb" "cc" "dd" "ee" "ff"> class(a) ## 分割后的數(shù)據(jù)類型為列表[1] "list" |
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> b <- strsplit(test,split = "") ## 分隔符設(shè)為空，則拆分每一個(gè)字符> b[[1]] [1] "a" "a" " " "b" "b" " " "c" "c" " " "d" "d" " " "e" "e" " " "f"[17] "f" |
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> test <- "aa,bb,cc,dd,ee!ff!GG" ##重新創(chuàng)建測(cè)試數(shù)據(jù)> strsplit(test,split = ",") ##指定分隔符為","進(jìn)行拆分[[1]][1] "aa" "bb" "cc" "dd" "ee!ff!GG"> strsplit(test,split = "!") ##指定分隔符為"!"進(jìn)行拆分[[1]][1] "aa,bb,cc,dd,ee" "ff" "GG" |
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> test <- "aa,bb,cc,dd,ee!ff!GG" ##重新創(chuàng)建測(cè)試數(shù)據(jù)> strsplit(test,split = ",") ##指定分隔符為","進(jìn)行拆分[[1]][1] "aa" "bb" "cc" "dd" "ee!ff!GG"> strsplit(test,split = "!") ##指定分隔符為"!"進(jìn)行拆分[[1]][1] "aa,bb,cc,dd,ee" "ff" "GG" |
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> test <- "aa.bb.cc.dd.ee" ##同上> strsplit(test,split = ".")[[1]] [1] "" "" "" "" "" "" "" "" "" "" "" "" "" ""> strsplit(test,split = ".",fixed = T)[[1]][1] "aa" "bb" "cc" "dd" "ee" |
3、指定輸出結(jié)果為向量
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> test <- "aa,bb,cc,dd,ee" ##生產(chǎn)測(cè)試數(shù)據(jù)> a <- strsplit(test,split = ",") > a[[1]][1] "aa" "bb" "cc" "dd" "ee"> class(a)[1] "list"> b <- unlist(strsplit(test,split = ",")) ## 加unlist函數(shù)> b[1] "aa" "bb" "cc" "dd" "ee"> class(b) [1] "character" |
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原文鏈接：https://www.cnblogs.com/liujiaxin2018/p/13764635.html
