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Save every output of a Rasch analysis to a folder

Source: R/export.R
save_outputs.Rd

Writes all tables (item statistics, thresholds with standard errors, person estimates including ID and factors, the score-to-measure table, residual correlations, principal-component loadings, category frequencies, and DIF results for every nominated factor) as CSV; every plot, including the per-item characteristic, category, threshold, and frequency plots, as PNG and optionally PDF; and a plain-text analysis summary.

Usage

save_outputs(
  fit,
  dir,
  formats = c("png", "pdf"),
  width = 9,
  height = 6,
  dpi = 300,
  item_plots = TRUE
)

Arguments

fit

A fitted object from rasch.

dir

Output directory; created if absent.

formats

Plot formats, any of "png" and "pdf".

width, height

Plot size in inches.

dpi

PNG resolution; the default 300 is publication quality.

item_plots

Also write the per-item plot set (one ICC, category curve, threshold curve, and frequency chart per item).

Value

Invisibly, the vector of files written.

Examples

set.seed(1)
d <- seq(-2, 2, length.out = 6)
X <- matrix(rbinom(300 * 6, 1, plogis(outer(rnorm(300), d, "-"))), 300, 6)
colnames(X) <- paste0("I", 1:6)
out <- file.path(tempdir(), "rasch-out")
save_outputs(rasch(X), out, formats = "png", item_plots = FALSE)