R - Strings Handling

R Strings Handling

Handling Strings

substr() :

substr() extracts or replaces substrings in a character vector

Syntax

str(substr)
	function (x, start, stop)
	
		Where,
			x: character vector
			start: integer, the first element to be replaced
			stop: integer, the last element to be replaced

CODE/PROGRAM/EXAMPLE

txt
	[1] "a test of capitalizing"

	substr(txt, 3, 6)
	[1] "test"

	newTxt <- c("Red", "Green", "Blue")
	substr(newTxt, 1, 1)
	[1] "R" "G" "B"

	txt
	[1] "a test of capitalizing"
	substr(txt, 3, 6) <- "type"

	print(txt)
	[1] "a type of capitalizing"

‘test’ has been extracted from vector ‘txt’ and replaced with ‘type’

chartr() :

chartr() does string substitutions

Syntax

str(chartr)
	function (old, new, x)
		
		Where,
			old : old string to be substituted
			new : new string
			x : object with the text data

CODE/PROGRAM/EXAMPLE

newTxt
	[1] "Red" "Blue" "Green"

	chartr("e", "O", newTxt)
	[1] "ROd" "BluO" "GrOOn"

strsplit() :

strsplit() splits the elements of a character vector ‘x’ into substrings, according to the matches to substring split within them

Syntax

str(strsplit)
	function (x, split, fixed = FALSE, perl = FALSE, useBytes = FALSE)
		
		Where,
			x: the object with the text data
			split: the position at which the data has to be split
			rest are additional options for more detailed search
				txt1 <- c(“.count”, “..finan.ce”, “cost”, “.date”, “..coin”)
				strsplit(txt1, “o”)

Output:

#substr()_function_in_r_language #chartr()_function_in_r_language #strsplit()_function_in_r_language

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