TAM (version 4.2-21)

data.sim.mfr: Simulated Multifaceted Data

Description

Simulated data from multiple facets.

Usage

data(data.sim.mfr)
 data(data.sim.facets)

Format

The format of data.sim.mfr is:
num [1:100, 1:5] 3 2 1 1 0 1 0 1 0 0 ...
- attr(*, "dimnames")=List of 2
..$ : chr [1:100] "V1" "V1.1" "V1.2" "V1.3" ...
..$ : NULL

The format of data.sim.facets is:
'data.frame': 100 obs. of 3 variables:
$ rater : num 1 2 3 4 5 1 2 3 4 5 ...
$ topic : num 3 1 3 1 3 2 3 2 2 1 ...
$ female: num 2 2 1 2 1 1 2 1 2 1 ...

Examples

#######
# sim multi faceted Rasch model
data(data.sim.mfr)
data(data.sim.facets)

  # 1: A-matrix test_rater
  test_1_items <- TAM::.A.matrix( data.sim.mfr, formulaA=~rater,
            facets=data.sim.facets, constraint="items" )
  test_1_cases <- TAM::.A.matrix( data.sim.mfr, formulaA=~rater,
            facets=data.sim.facets, constraint="cases" )

  # 2: test_item+rater
  test_2_cases <- TAM::.A.matrix( data.sim.mfr, formulaA=~item+rater,
            facets=data.sim.facets, constraint="cases" )

  # 3: test_item+rater+topic+ratertopic
  test_3_items <- TAM::.A.matrix( data.sim.mfr, formulaA=~item+rater*topic,
            facets=data.sim.facets, constraint="items" )
  # conquest uses a different way of ordering the rows
  # these are the first few rows of the conquest design matrix
  # test_3_items$A[grep("item1([[:print:]])*topic1", rownames(test_3_items)),]

  # 4: test_item+step
  test_4_cases <- TAM::.A.matrix( data.sim.mfr, formulaA=~item+step,
            facets=data.sim.facets, constraint="cases" )

  # 5: test_item+item:step
  test_5_cases <- TAM::.A.matrix( data.sim.mfr, formulaA=~item+item:step,
            facets=data.sim.facets, constraint="cases" )
  test_5_cases$A[, grep("item1", colnames(test_5_cases)) ]

  # 5+x: more
  #=> 6: is this even well defined in the conquest-design output
  #          (see test_item+topicstep_cases.cqc / .des)
  #        regardless of the meaning of such a formula;
  #        currently .A.matrix throws a warning
  # test_6_cases <- TAM::.A.matrix( data.sim.mfr, formulaA=~item+topic:step,
  #                 facets=data.sim.facets, constraint="cases" )
  test_7_cases <- TAM::.A.matrix( data.sim.mfr, formulaA=~item+topic+topic:step,
            facets=data.sim.facets, constraint="cases" )

if (FALSE) {
  #=> 8: same as with 6
  test_8_cases <- TAM::.A.matrix( data.sim.mfr, formulaA=~item+rater+item:rater:step,
            facets=data.sim.facets, constraint="cases" )
## [1] "Can't proceed the estimation: Lower-order term is missing."
  test_9_cases <- TAM::.A.matrix( data.sim.mfr, formulaA=~item+step+rater+item:step+item:rater,
            facets=data.sim.facets, constraint="cases" )
  test_10_cases <- TAM::.A.matrix( data.sim.mfr, formulaA=~item+female+item:female,
            facets=data.sim.facets, constraint="cases" )

  ### All Design matrices
  test_1_cases <- TAM::designMatrices.mfr( data.sim.mfr, formulaA=~rater,
            facets=data.sim.facets, constraint="cases" )
  test_4_cases <- TAM::designMatrices.mfr( data.sim.mfr, formulaA=~item+item:step,
            facets=data.sim.facets, constraint="cases" )

  ### TAM
  test_4_cases <- TAM::tam.mml.mfr( data.sim.mfr, formulaA=~item+item:step )
  test_tam <- TAM::tam.mml( data.sim.mfr )

  test_1_cases <- TAM::tam.mml.mfr( data.sim.mfr, formulaA=~rater,
            facets=data.sim.facets, constraint="cases" )
  test_2_cases <- TAM::tam.mml.mfr( data.sim.mfr, formulaA=~item+rater,
            facets=data.sim.facets, constraint="cases" )}