Nothing
## ---- include = FALSE---------------------------------------------------------
knitr::opts_chunk$set(
collapse = TRUE,
comment = "#>"
)
## ----installation, eval = FALSE-----------------------------------------------
# install.packages("eatATA")
## ----library, message = FALSE-------------------------------------------------
# loading eatATA
library(eatATA)
# item pool structure
str(items_mini)
# calculate and append IIF
items_mini[, "IIF_0"] <- calculateIIF(B = items_mini$difficulty, theta = 0)
## ----item pool, eval = TRUE, results = 'asis', echo = FALSE-------------------
# create content bounderies in advance
knitr::kable(items_mini[1:5,], digits = 3, caption = "Table 1. First 5 Items of the Item Pool")
## ----objFun, message = FALSE--------------------------------------------------
testInfo <- maxObjective(nForms = 1, itemValues = items_mini$IIF,
itemIDs = items_mini$item)
## ----constraints, message = FALSE---------------------------------------------
itemNumber <- itemsPerFormConstraint(nForms = 1, operator = "=",
targetValue = 10,
itemIDs = items_mini$item)
itemUsage <- itemUsageConstraint(nForms = 1, operator = "<=",
targetValue = 1,
itemIDs = items_mini$item)
testTime <- itemValuesDeviationConstraint(nForms = 1,
itemValues = items_mini$time,
targetValue = 8 * 60,
allowedDeviation = 5,
relative = FALSE,
itemIDs = items_mini$item)
## ----test time, message = TRUE------------------------------------------------
testTime2 <- autoItemValuesMinMaxConstraint(nForms = 1,
itemValues = items_mini$time,
testLength = 10,
allowedDeviation = 5,
relative = FALSE,
itemIDs = items_mini$item)
## ----solver, message = FALSE--------------------------------------------------
solver_out <- useSolver(list(itemNumber, itemUsage, testTime, testInfo),
solver = "GLPK")
## ----inspect, message = FALSE-------------------------------------------------
inspectSolution(solver_out, items = items_mini, idCol = "item")
## ----append, message = FALSE--------------------------------------------------
appendSolution(solver_out, items = items_mini, idCol = "item")
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