Seek a Match for the Pattern in the String in R Programming - pmatch() Function Last Updated : 16 Jun, 2020 Summarize Comments Improve Suggest changes Share Like Article Like Report pmatch() function in R Language is used to seek match for the pattern passed as argument. It returns the strings that begin with the pattern being searched. Syntax: pmatch(pat, string, nomatch) Parameters: pat: pattern vector to be searched string: vector to be matched nomatch: return when no match is found Example 1: Python3 1== # R Program to match pattern in a string # Creating string vector x <- c("Geeks", "Books", "geek") x # Matching pattern pmatch("gee", x) pmatch("Boo", x) Output: [1] "Geeks" "Books" "geek" [1] 3 [1] 2 Example 2: Python3 1== # R Program to match pattern in a string # Creating string vector x <- c("Geeks", "Books", "geek") x # Matching pattern pmatch(c("Gee", "Boo", "re"), x, nomatch = -1) Output: [1] "Geeks" "Books" "geek" [1] 1 2 -1 Comment More infoAdvertise with us Next Article Replace the First Match of a Pattern from a String in R Programming â sub() Function N nidhi_biet Follow Improve Article Tags : R Language R String-Functions Similar Reads Matching of patterns in a String in R Programming - agrep() Function agrep() function in R Language is used to search for approximate matches to pattern within each element of the given string. Syntax: agrep(pattern, x, ignore.case=FALSE, value=FALSE)Parameters:pattern: Specified pattern which is going to be matched with given elements of the string. x: Specified st 1 min read Replace all the matches of a Pattern from a String in R Programming - gsub() Function gsub() function in R Language is used to replace all the matches of a pattern from a string. If the pattern is not found the string will be returned as it is. Syntax: gsub(pattern, replacement, string, ignore.case=TRUE/FALSE) Parameters: pattern: string to be matched replacement: string for replacem 1 min read Replace the First Match of a Pattern from a String in R Programming – sub() Function sub function in R Language is used to replace the first match of a pattern in a string. If there is a vector of string elements, then it will replace the first match of the pattern from all elements. Syntax: sub(pattern, replacement, string, ignore.case=TRUE/FALSE) Parameters: pattern: string to be 1 min read Find position of a Matched Pattern in a String in R Programming – grep() Function grep() function in R Language is used to search for matches of a pattern within each element of the given string. Syntax: grep(pattern, x, ignore.case=TRUE/FALSE, value=TRUE/FALSE)Parameters: pattern: Specified pattern which is going to be matched with given elements of the string. x: Specified str 1 min read Find String Matches in a Vector or Matrix in R Programming - str_detect() Function str_detect() Function in R Language is used to check if the specified match of the substring exists in the original string. It will return TRUE for a match found otherwise FALSE against each of the element of the Vector or matrix. Note: This function uses 'stringr' Library. Syntax: str_detect(string 2 min read Check for a Pattern in the Vector in R Programming - grepl() Function grepl() function in R Language is used to return the value True if the specified pattern is found in the vector and false if it is not found. Syntax: grepl(pattern, string, ignore.case=FALSE) Parameters: pattern: regular expressions pattern string: character vector to be searched ignore.case: whethe 1 min read Like