Find String Matches in a Vector or Matrix in R Programming - str_detect() Function

Matching of patterns in a String in R Programming - agrep() Function

Last Updated : 14 Apr, 2021

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 string vector.
ignore.case: If its value is TRUE, it ignore case.
value: If its value is TRUE, it return the matching elements vector, else return the indices vector.

Example 1:

Python3

# R program to illustrate
# agrep function

# Creating string vector
x <- c("GFG", "gfg", "Geeks", "GEEKS")

# Calling agrep() function
agrep("gfg", x)
agrep("Geeks", x)
agrep("gfg", x, ignore.case = TRUE)
agrep("Geeks", x, ignore.case = TRUE)

Output :

[1] 2
[1] 3
[1] 1 2
[1] 3 4

Example 2:

Python3

# R program to illustrate
# agrep function

# Creating string vector
x <- c("GFG", "gfg", "Geeks", "GEEKS")

# Calling agrep() function
agrep("gfg", x, ignore.case = TRUE, value = TRUE)
agrep("G", x, ignore.case = TRUE, value = TRUE)
agrep("Geeks", x, ignore.case = FALSE, value = FALSE)
agrep("GEEKS", x, ignore.case = FALSE, value = FALSE)

Output:

[1] "GFG" "gfg"
[1] "GFG"   "gfg"   "Geeks" "GEEKS"
[1] 3
[1] 4

Find String Matches in a Vector or Matrix in R Programming - str_detect() Function

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