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crunch (version 1.30.4)

createSubvarDeriv: Create subvariable derivation expressions

Description

This function creates a single subvariable definition based on a character string to search for and an originating variable. It uses regex to determine whether a string is present in a delimited list, then substitutes the user supplied values to indicate selection, non-selection, and missingness.

Usage

createSubvarDeriv(var, str, delim, selected, not_selected, unanswered)

Value

A VariableDefinition

Arguments

var

The variable containing the delimited responses

str

A string whose presence indicates a selection

delim

The delimiter separating the responses

selected

A character string used to indicate a selection, defaults to "selected"

not_selected

Character string identifying non-selection, defaults to "not_selected"

unanswered

Character string indicating non-response, defaults to NA.