R : Character object

A character object in R represents string of characters.

> name <- "Krishna"
> ls()
[1] "clc"  "name"
> eapply(.GlobalEnv,typeof)
$name
[1] "character"

$clc
[1] "closure"

ls() returns what data sets and functions are defined.

Converts objects to character

You can convert other objects like numbers to character by using as.character() function.

> revenue=25.34
> revenueChar=as.character(revenue)
> revenueChar
[1] "25.34"

Concatenate two character objects

You can concatenate two character objects using paste function.

> firstName <- "Hari krishna"
> lastName <- "Gurram"
> fullName <- paste(firstName, lastName)
> fullName
[1] "Hari krishna Gurram"

Extracting substring from character object

You can extract sub string from character object using substr method.

> substr("Welcome to R Language", start=14, stop=21)
[1] "Language"

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