make_projoint_data: Make a 'projoint_data' object from a labelled tibble

In projoint: Conjoint Analysis with Reliability Correction and Visualization

Make a projoint_data object from a labelled tibble

Description

Converts a labelled tibble/data frame (one column per attribute) into an object of class projoint_data that downstream functions (e.g., projoint) can consume. The unit of observation should be each of two profiles in each task for each respondent.

Usage

make_projoint_data(
  .dataframe,
  .attribute_vars,
  .id_var = "id",
  .task_var = "task",
  .profile_var = "profile",
  .selected_var = "selected",
  .selected_repeated_var = NULL,
  .fill = FALSE
)

Arguments

.dataframe	A data frame (or tibble). One row per profile per task per respondent.
.attribute_vars	Character vector of attribute column names.
.id_var	Column name (character) with respondent IDs. Default "id".
.task_var	Column name (character) with task numbers. Default "task".
.profile_var	Column name (character) with profile numbers. Default "profile".
.selected_var	Column name (character) with the binary choice for each task (values in {0,1}). Default "selected".
.selected_repeated_var	Optional column name (character) with the binary choice for the repeated task. Default NULL.
.fill	Logical. If TRUE, uses repeated-task agreement to fill missing agreement values for non-repeated tasks (assumes IRR is independent of table content). If unsure, prefer the default FALSE.

Value

A projoint_data object (a list-like object containing a labels tibble and a data tibble) ready to pass to projoint and related functions.

Examples

# Example: build a projoint_data object from the labelled-tibble example
data(exampleData1_labelled_tibble)

att_cols <- c("School Quality", "Violent Crime Rate (Vs National Rate)",
              "Racial Composition", "Housing Cost",
              "Presidential Vote (2020)", 
              "Total Daily Driving Time for Commuting and Errands",
              "Type of Place")

pj_dat <- make_projoint_data(
  .dataframe             = exampleData1_labelled_tibble,
  .attribute_vars        = att_cols,
  .id_var                = "id",
  .task_var              = "task",
  .profile_var           = "profile",
  .selected_var          = "selected",
  .selected_repeated_var = "selected_repeated",
  .fill                  = FALSE
)

class(pj_dat)
# [1] "projoint_data"

projoint documentation built on Feb. 16, 2026, 5:10 p.m.