select_vars

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Select variables.

These functions power select() and rename().

Keywords
internal
Usage
select_vars(vars, ..., include = character(), exclude = character())

select_vars_(vars, args, include = character(), exclude = character())

rename_vars(vars, ...)

rename_vars_(vars, args)

Arguments
vars

A character vector of existing column names.

..., args

Expressions to compute. select_vars and rename_vars

include, exclude

Character vector of column names to always include/exclude.

Value

A named character vector. Values are existing column names, names are new names.

Aliases
  • rename_vars
  • rename_vars_
  • select_vars
  • select_vars_
Examples
library(dplyr) # Keep variables select_vars(names(iris), everything()) select_vars(names(iris), starts_with("Petal")) select_vars(names(iris), ends_with("Width")) select_vars(names(iris), contains("etal")) select_vars(names(iris), matches(".t.")) select_vars(names(iris), Petal.Length, Petal.Width) select_vars(names(iris), one_of("Petal.Length", "Petal.Width")) df <- as.data.frame(matrix(runif(100), nrow = 10)) df <- df[c(3, 4, 7, 1, 9, 8, 5, 2, 6, 10)] select_vars(names(df), num_range("V", 4:6)) # Drop variables select_vars(names(iris), -starts_with("Petal")) select_vars(names(iris), -ends_with("Width")) select_vars(names(iris), -contains("etal")) select_vars(names(iris), -matches(".t.")) select_vars(names(iris), -Petal.Length, -Petal.Width) # Rename variables select_vars(names(iris), petal_length = Petal.Length) select_vars(names(iris), petal = starts_with("Petal")) # Rename variables preserving all existing rename_vars(names(iris), petal_length = Petal.Length) # Standard evaluation ------------------------------------------------------- # You can use names, calls, formulas (or lists of), or a character vector select_vars_(names(iris), list(~Petal.Length)) select_vars_(names(iris), list(quote(Petal.Length))) select_vars_(names(iris), "Petal.Length")
Documentation reproduced from package dplyr, version 0.5.0, License: MIT + file LICENSE

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