new_variable: Creates a new variable in the dataframe.

In robertzk/syberiaMungebits: Common mungebits used with Syberia projects.

Description

Wrapper around the default multi_column_transformation mungebit to make new variables.

Usage

new_variable(df, fun, new_variable, old_variables = NULL)

Arguments

df	dataframe. The dataframe to modify.
fun	function. The function to run to convert old_variables to new_variables. Also can take a non-function expression that will be converted to function() expression.
new_variable	character. The name of the desired new variable.
old_variables	character. The names of the variables needed to make the new_variable.

Value

Does not return anything, but modifies-in-place the dataframe to have that new variable.

Author(s)

Peter Hurford

Examples

new_variable(iris, function(Sepal.Width, Sepal.Length) Sepal.Width*2 + Sepal.Length*2, 'Sepal.Perimeter')
new_variable(iris, iris$Sepal.Width, 'Sepal.Width2')

# Usage in a Syberia file
list("Make new variable" = list(
  new_variable,
  function(Sepal.Width, Sepal.Length) Sepal.Width*2 + Sepal.Length*2,
  'Sepal.Perimeter'
))

robertzk/syberiaMungebits documentation built on July 30, 2019, 3:37 p.m.