difplot: A Wrapper for DIF vizualizing functions

In jsakaluk/psyscores: scripty: Automated Syntax Generation of Measurement Models

Description

This function automates visualizing uniform or nonuniform DIF across a contiuous covariate

Usage

difplot(
  df,
  covname,
  covmin,
  covmax,
  covtitle,
  lvtitle,
  type = NULL,
  sig.uni = NULL,
  sig.nonuni = NULL
)

Arguments

df	input data frame consisting of factor indicators and DIF covariate
covname	input character vector name for DIF covariate in df
covmin	input numeric for minimum value of covariate to begin estimating unidimensional factor models
covmax	input numeric for maximum value of covariate to begin estimating unidimensional factor models
covtitle	character input of name for covariate (both on x-axis title, and in file name)
lvtitle	character input for name of lv (for file naming)
type	whether user wants to extract loading ("loads") or interpts "ints"
sig.uni	an optional character vector of item #s that show significant uniform DIF
sig.nonuni	an optional character vector of item #s that show significant non-uniform DIF

Value

a ggplot of DIF (also ggsave'd to ./output)

Examples

load.plot <- difplot(df, covname, covmin = 3, covmax = 8, covtitle = "Perceived Social Class", lvtitle = "Satisfaction", type = "loads", sig.nonuni = sig.nonuni)

jsakaluk/psyscores documentation built on Dec. 16, 2021, 6:50 p.m.