R - Character type

1 - About

A vector containing character values.

3 - Example

  • One

> v = "My Name";
> class(v)
[1] "character"

  • List

> v <- c("My Name","Is","Nico")
> class(v)
[1] "character"

4 - Management

4.1 - Counting the number of occurrence


library(stringr)
str_count("/mt/path", "/")


[1] 2

4.2 - Concatenate

Concatenate vectors after converting to character.


helloWorld <- paste0("Hello", "world", sep=" ")

where:

  • sep is the separator character between the arguments

4.3 - Escape \ Quotes

4.4 - Substring


substr(x, start, stop)
substring(text, first, last = 1000000L)
substr(x, start, stop) <- value
substring(text, first, last = 1000000L) <- value

4.5 - Contain

  • grepl returns a logical vector (match or not for each element of the input x).

test = "[nqSError: 46066]"
grepl("46066",test)


[1] TRUE

  • grep will filter the vector.

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