collapse (version 1.7.6)

frename: Fast Renaming and Relabelling Objects

Description

A fast substitute for dplyr::rename. setrename renames objects by reference. These functions also work with objects other than data frames that have a 'names' attribute. relabel and setrelabel do that same for labels attached to list elements / data frame columns.

Usage

frename(.x, …, cols = NULL)
rnm(.x, …, cols = NULL)     # Shortcut for frename()
setrename(.x, …, cols = NULL)
relabel(.x, …, cols = NULL, attrn = "label")
setrelabel(.x, …, cols = NULL, attrn = "label")

Arguments

.x

an R object with a 'names' attribute.

…

either tagged vector expressions of the form name = newname / name = newlabel, or a single function (+ optional arguments to the function) applied to all names/labels (of columns/elements selected in cols).

cols

If … is a function, select a subset of columns/elements to rename/relabel using names, indices, a logical vector or a function applied to the columns if .x is a data frame (e.g. is.numeric).

attrn

character. Name of attribute to store labels or retrieve labels from.

Value

.x renamed / relabelled. setrename and setrelabel return .x invisibly.

See Also

Data Frame Manipulation, Collapse Overview

Examples

# NOT RUN {
## Using tagged expressions
head(frename(iris, Sepal.Length = SL, Sepal.Width = SW,
                   Petal.Length = PL, Petal.Width = PW))
head(frename(iris, Sepal.Length = "S L", Sepal.Width = "S W",
                   Petal.Length = "P L", Petal.Width = "P W"))

## Using a function
head(frename(iris, tolower))
head(frename(iris, tolower, cols = 1:2))
head(frename(iris, tolower, cols = is.numeric))
head(frename(iris, paste, "new", sep = "_", cols = 1:2))

## Renaming by reference
# setrename(iris, tolower)
# head(iris)
# rm(iris)

## Relabelling (by reference)
# namlab(relabel(wlddev, PCGDP = "GDP per Capita", LIFEEX = "Life Expectancy"))
# namlab(relabel(wlddev, toupper))


# }