rx_lowercase: Match lower case letters.

In RVerbalExpressions: Create Regular Expressions Easily

Description

Matches lower case letters only.

Usage

rx_lowercase(.data = NULL, inverse = FALSE)

Arguments

.data	Expression to append, typically pulled from the pipe %>%
inverse	Invert match behavior, defaults to FALSE (match lower case). Use TRUE to not match lower case.

Examples

rx_lowercase()
rx_lowercase(inverse = TRUE)

# create an expression
x <- rx_lowercase()
y <- rx_lowercase(inverse = TRUE)

# create input
string <- "Apple 1!"

# extract match
regmatches(string, gregexpr(x, string))
regmatches(string, gregexpr(y, string))

RVerbalExpressions documentation built on Nov. 6, 2019, 5:08 p.m.