plot.rasch: Plot Item Characteristic Curves

In nando11235813/raschreg: Item Response Theory models including explanatory variables of the ability parameter

Description

The function plot.rasch computes (and by default plots) the item characteristic curve of every item from a fitted Rasch (regression) model.

Usage

  ## S3 method for class 'rasch'
plot(x, ..., xlim=c(-4,4), item = NULL, main = NULL)

Arguments

x	Fitted Rasch (regression) model whose ICCs are to be ploted.
...	Additional arguments.
xlim	Range of values of ability over which to graph de ICC.
item	A character string for ICC identification.
main	A main title for the plot.

Details

Describes the relationship between the latent ability and the probability of a correct response on each item.

Value

None.

Author(s)

Fernando Massa, [e-mail]

See Also

info, pim, forest, itemfit

Examples

n <- 100
X <- sim_rasch(n)
mod <- rasch(X)
plot(mod)
plot(mod, item = 'item4', main = 'ICC for item4')

nando11235813/raschreg documentation built on Oct. 2, 2021, 3:11 p.m.