Description Usage Arguments Value Examples
This function automates visualizing uniform or nonuniform DIF across a contiuous covariate
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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 |
a ggplot of DIF (also ggsave'd to ./output)
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