TestDesign: loadConstraints – R documentation

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loadConstraints

Load constraints

Description

loadConstraints is a data loading function to create a constraints object. loadConstraints can read constraints from a data.frame or a .csv file. The contents must be in the expected format; see the vignette in vignette("constraints").

Usage

loadConstraints(object, pool, item_attrib, st_attrib = NULL, file = NULL)

Arguments

`object`	constraint specifications. Can be a `data.frame` or the file path of a .csv file. See the vignette for the expected format.
`pool`	an `item_pool` object. Use `loadItemPool` for this.
`item_attrib`	an `item_attrib` object. Use `loadItemAttrib` for this.
`st_attrib`	(optional) an `st_attrib` object. Use `loadStAttrib` for this.
`file`	(deprecated) use `object` argument instead.

Value

loadConstraints returns a constraints object. This object is used in Static and Shadow.

Examples

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

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

## TestDesign 1.1.0 - Deprecated arguments
## Not run: 
loadConstraints(object = "consts.csv", pool, item_attrib) # is equivalent to
loadConstraints(file   = "consts.csv", pool, item_attrib) # 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