Setup | Item pool | Prepare item information | ATA goal | Objective Function | Set up constraints | Run solver | Inspect Solution | Save as Excel

Importing | GADSdat objects | Extracting data from GADSdat

Importing data | Splitting and Reshaping | Handling meta data | Preparing and Creating the data base

Why? | Inspecting the data base | Extract data from data base | Extract data from GADSdat | Selecting different hierarchy levels | Trend data bases

Data structure | Meta data structure | Modifying meta data | Changing variable names | Changing variable labels | Changing SPSS format | Changing value labels | Removing value labels | Changing missing tags | Checking and adjusting missing tags and value labels | Reusing meta data | Adding and removing variables | Selecting or removing variables | Cloning a variable | Adding variables | Recoding | Removing all values from a variable | Manual recoding | Setting values to NA | Automatically recoding a character variable to a labeled numeric variable | Automatically recoding a variable with a template | Variable sorting | Relocating a specific variable | Ordering all variables | Changing meta data (and data) via an Excel sheet | Variable level | Value level

Setup | Importing data into the GADSdat format | Importing from SPSS | Importing from Excel etc. | GADSdat class | Saving GADSdat objects | Using GADSdat objects in R | Modifying GADSdat objects | Writing SPSS files

Preparing the data set | Creating and editing a lookup table | Apply lookup to GADSdat | Integrate character and numeric variable | Remove variables from GADSdat | Missing value codes

Preparing the data set | Creating and editing a lookup table | Apply lookup to GADSdat | Match values to variable labels | Integrate character and numeric variables | Trim down variables | Multiple character variables to labeled integers | Clean data set

Setup | Item pool preparation | Objective function | Constraints | Solver function | Using the solver output | Booklet exclusions

Setup | Item Pool | Objective Function | Constraints | Solver usage | Inspect solution