TestDesign: loadItemAttrib – R documentation

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loadItemAttrib

Load item attributes

Description

loadItemAttrib is a data loading function to create an item_attrib object. loadItemAttrib can read item attributes a data.frame or a .csv file.

Usage

loadItemAttrib(object, pool, file = NULL)

Arguments

`object`	item attributes. Can be a `data.frame` or the file path of a .csv file. The content should at least include column 'ID' that matches with the `item_pool` object.
`pool`	an `item_pool` object. Use `loadItemPool` for this.
`file`	(deprecated) use `object` argument instead.

Value

loadItemAttrib returns an item_attrib object.

data a data.frame containing item attributes.

Examples

## Read from data.frame:
itempool_science   <- loadItemPool(itempool_science_data)
itemattrib_science <- loadItemAttrib(itemattrib_science_data, itempool_science)

## Read from file: write to tempdir() for illustration and clean afterwards
f <- file.path(tempdir(), "itemattrib_science.csv")
write.csv(itemattrib_science_data, f, row.names = FALSE)
itemattrib_science <- loadItemAttrib(f, itempool_science)
file.remove(f)

## TestDesign 1.1.0 - Deprecated arguments
## Not run: 
loadItemAttrib(object = "iatt.csv", pool) # is equivalent to
loadItemAttrib(file   = "iatt.csv", pool) # pre 1.1.0

## End(Not run)

TestDesign

Optimal Test Design Approach to Fixed and Adaptive Test Construction

v1.2.2

GPL (>= 2)

Authors

Seung W. Choi [aut, cre] (<https://orcid.org/0000-0003-4777-5420>), Sangdon Lim [aut] (<https://orcid.org/0000-0002-2988-014X>)

Initial release

2021-01-26