GRShiny (version 1.0.0)

ICCplot: Plot ICC or OCC

Description

Plot ICC or OCC

Usage

ICCplot(
  fit,
  selected_item,
  theta = seq(-4, 4, 0.1),
  plot.occ = FALSE,
  addlabel = FALSE,
  base_size = 16,
  line_size = 1,
  cal_option = "D"
)

Value

a ggplot object.

Arguments

fit

an object from runGRM

selected_item

a numeric indicating for what items the function makes plots

theta

a numeric indicating latent traits

plot.occ

a logical. If TRUE, OCC is made instead of ICC

addlabel

a logical indicating whether to add the b parameter as labels

base_size

a numeric indicating the base font size

line_size

a numeric indicating the size of line

cal_option

a character indicating the plot color specified in scale_color_viridis_d (default = D)

Details

This makes either item characteristic curve plots or operating characteristic curve plots

Examples

grm_dt <- genData(eta = genTheta(nsample = 500, nfac = 1),
                 ipar = genIRTpar(nitem = 10, ncat = 3, nfac = 1))

fit <- runGRM(dat = grm_dt,
            lav.syntax = genLavSyn(dat = grm_dt, nfac = 1),
            estimator = "WL")
ICCplot(fit, 1, seq(-3, 3, .1), plot.occ = FALSE, base_size = 16)