irt (version 0.1.3)

$,Item-method: Get slots from an Item-class object.

Description

Get slots from an Item-class object.

Usage

# S4 method for Item
$(x, name)

Arguments

x

An Item-class object.

name

Name of the parameter.

Available values:

'id'

Extract 'id' of an Item-class object.

'model'

Extract the 'model' of an Item-class object.

'parameters'

Extract the 'parameters' of an Item-class object.

'se_parameters'

Extract the standard error of parameters of an Item-class object.

'content'

Extract the 'content' slot of an Item-class object.

'misc'

Extract the 'misc' slot of an Item-class object.

'max_score'

Extract the maximum possible score of an Item-class object. Minimum score is assumed to be 0.

Value

This operation will return the desired slot.

Examples

# NOT RUN {
item1 <- item(model =  "3PL", id = 'item23', content = 'Geometry',
              misc = list(enemies = c("item1", "item2")),
              parameters = list(b = 2, c = .12, a = 1.2, D = 1))
# Get individual parameters
item1$a
item1$b
item1$D
# Get item 'model'
item1$model
# Get all parameters
item1$parameters
# Get item 'id'
item1$id
# Get item content
item1$content
# Get misc values
item1$misc
# Get misc values
item1$max_score
# }