plot_EVC: Plot The Expected Value Curves

In fwijayanto/autoRasch: Semi-Automated Rasch Analysis

Plot The Expected Value Curves

Description

This function plots the curve(s) of the estimated ability parameters against its expected responses.

Usage

plot_EVC(
  obj = c(),
  itemno = 5,
  xlab = NULL,
  ylab = NULL,
  xlim = c(-10, 10),
  col = c("green4", "darkorange2", "red2"),
  lty = c(1, 1, 1),
  ...
)

Arguments

obj	The object of class 'pcm'.
itemno	A number of the item that is wanted to be plot.
xlab	a title for the x axis.
ylab	a title for the y axis.
xlim	the x limits (x1, x2) of the plot. Note that x1 > x2 is allowed and leads to a ‘reversed axis’. The default value, NULL, indicates that the range of the finite values to be plotted should be used; see plot.default()
col	a vector of plotting colors
lty	a vector of line types.
...	Further arguments to be passed.

Value

There are no values to return. Instead, it plots expected values from the model.

Examples

res <- pcm(short_poly_data)
plot_EVC(res, itemno = 4)

fwijayanto/autoRasch documentation built on Nov. 9, 2022, 12:57 p.m.