Get Variable Label

Description

This function returns character value previously stored in variable's label attribute. If none found, and fallback argument is set to TRUE (default), the function returns object's name (retrieved by deparse(substitute(x))), otherwise NA is returned with a warning notice.

Usage

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label(x, fallback = TRUE, simplify = TRUE)

Arguments

x

an R object to extract labels from

fallback

a logical value indicating if labels should fallback to object name(s)

simplify

coerce results to a vector (TRUE by default), otherwise, a list is returned

Value

a character vector with variable's label(s)

Examples

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## Not run: 
x <- rnorm(100)
label(x)         # returns "x"
label(x, FALSE)  # returns NA and issues a warning

label(mtcars$hp) <- "Horsepower"
label(mtcars)         # returns "Horsepower" instead of "hp"
label(mtcars, FALSE)  # returns NA where no labels are found
label(sleep, FALSE)   # returns NA for each variable and issues a warning

## End(Not run)