Scale (version 1.0.4)

ChooseBest: Select Items from Item Analysis.

Description

Takes an ItemAnalysis object, and returns the column names, i.e. the item labels of those items that load the highest on the single factor. Defaults to 5 items.

Usage

ChooseBest(it, n=5)

Arguments

it

An ItemAnalysis object, produced by the ItemAnalysis() function.

n

The number of items to select. Asking for more items than available leads to an error.

Value

A character vector, with the labels of the items, as defined in ScaleData object.

Examples

data(Depression98)
depressionScale <- Scale(data=Depression98, 
                         orders=list(
                           c(16,19,11,9,1,17,5,18,4,8,2,12,
                             20,10,14,6,3,13,15,7),
                           c(1,18,4,15,7,8,3,14,20,6,19,16,
                             12,5,10,13,2,17,11,9)),
                         orders_id=c(
                           rep(1, 49),
                           rep(2, 49)),
                         reverse=c(3,4,13,14,18,20),
                         col_names= paste('q', 1:20, sep=''))
depressionPre <- PreProc(depressionScale)

depressionRel <- ItemAnalysis(depressionPre)

depressionItems <- ChooseBest(depressionRel)