grepl()
This grepl() function in the R language returns the value True if the specified pattern is found in the vector and false if it is not found.
The syntax is given below,
Syntax: grepl(stringPattern, string, ignore.case=FALSE)
Parameters:
- stringPattern: The string pattern to be searched
- string: character vector on which searching to be performed
- ignore.case: whether to ignore case in the search. Here ignore.case is an optional parameter as is set to FALSE by default.
Example 1:
R
# R program to illustrate # grepl function # Initializing a string vector str <- c("w3wiki", "Bhuwanesh", "Nainwal", "gfg") # Calling grepl() function grepl("w3wiki", str) grepl("Bhuwanesh", str) grepl("gfg", str) grepl("Nainwal", str) |
Output:
Example 2:
R
# R program to illustrate # grepl function # Creating string vector x <- c("w3wiki", "Bhuwanesh", "Nainwal", "gfg") # Calling grepl() function grepl("gfg", x, ignore.case = TRUE) grepl("Bhuwanesh", x, ignore.case = TRUE) grepl("w3wiki", x, ignore.case = TRUE) grepl("Nainwal", x, ignore.case = TRUE) |
Output:
Difference Between grep() vs. grepl() in R
In this article, we will discuss the difference between grep() and grepl() in R programming language.