gen: generates a new variable that is a transformation of existing...

In genvar: An Imperative Library for Data Manipulation

Description

generates a new variable that is a transformation of existing variables in the dataset or replaces one

Usage

gen(var, value, byvar = NULL, subset = NULL, replace = FALSE)

Arguments

var	the name of the variable to be generated
value	the transformation of the dataset to replace the "newvar" in option form with. For example, value="sum(wage*female)" to get a variable which has total female wages. In Stata, the same command would be: "egen femalewage = total(wage*female)".
byvar	apply the value for each level of the by variables, specified either as a formula, like ~byvar1+byvar2+... or as a varlist "byvar1 byvar2 byvar3...".
subset	only generate values if the condition provided in subset is true. Make sure to enclose the expression in quotes, like so: subset="female==1 & highschool==1" to generate the values only for women who graduated from highschool. This option is used like the "if" in Stata.
replace	either TRUE or FALSE. If FALSE (default), the code refuses to alter the variable if the variable already exists. Otherwise, if replace=TRUE, then the values will be replaced.

Value

returns NULL, invisibly

Examples

use(cars, clear=TRUE)
gen(speeddist, speed*dist)
listif()

genvar documentation built on Jan. 21, 2020, 9:07 a.m.