Coerce to a utility object — as

Coerce data frames to utility objects

A utility object contains is a data frame that meets the following criteria:

It contains a column that acts as a unique respondent identifier and another that identifies different surveys over time.
It contains additional columns that represent the country, type and value of a utility that has previously been calculated.
Together, Each combination of respondent identifier, survey identifier, utility country and utility type should be unique and not duplicated across rows.

Usage

as_utility(x, respondentID, surveyID, country, type, value)

x: [data.frame].
respondentID: [character] Unique respondent identifier. The name of a variable in x that uniquely identifies respondents.
surveyID: [character] Name of variable in x that uniquely identifies surveys over time. To avoid ambiguity the specified variable must be either numeric or a factor (in which case the order will be taken as that given by the factor levels).
country: [character] Name of variable in x representing the utility country.
type: [character] Name of variable in x representing the utility country.
value: [character] Name of variable in x representing the utility value.

A tibble like <utility> object.