R substr()

1 개요

R substr()

• "Substrings Of A Character Vector → 캐릭터 벡터의 부분문자열"
• 캐릭터 벡터에서 부분문자열을 추출하거나 교체한다.

substr("ABCDEF", 3, 3) ## [1] "C"
substr("ABCDEF", 3, 5) ## [1] "CDE"

substr(c("ABCDEFGH","abcdefgh","12345678","QWERTYUI"), 1, 1)   ## [1] "A" "a" "1" "Q"
substr(c("ABCDEFGH","abcdefgh","12345678","QWERTYUI"), 1, 3)   ## [1] "ABC" "abc" "123" "QWE"
substr(c("ABCDEFGH","abcdefgh","12345678","QWERTYUI"), 1, 2:3) ## [1] "AB"  "abc" "12"  "QWE"

substr(c("ABCDEFGH","abcdefgh","12345678","QWERTYUI"), 1:2, 4)   ## [1] "ABCD" "bcd"  "1234" "WER" 
substr(c("ABCDEFGH","abcdefgh","12345678","QWERTYUI"), 1:4, 4)   ## [1] "ABCD" "bcd"  "34"   "R"   
substr(c("ABCDEFGH","abcdefgh","12345678","QWERTYUI"), 1:4, 4:7) ## [1] "ABCD" "bcde" "3456" "RTYU"

2 같이 보기

• R paste()
• R nchar()
• R strsplit()
• 함수 substr()

3 참고

• https://www.rdocumentation.org/packages/base/versions/3.5.3/topics/substr