Add, change or define item properties in a dexter project
add_item_properties(db, item_properties = NULL, default_values = NULL)a connection to a dexter database, e.g. the output of start_new_project
or open_project
A data frame containing a column item_id (matching item_id's already defined in the project) and 1 or more other columns with item properties (e.g. item_type, subject)
a list where the names are item_properties and the values are defaults. The defaults will be used wherever the item property is unknown.
nothing
When entering response data in the form of a rectangular person x item table, it is easy to provide person properties but practically impossible to provide item properties. This function provides a possibility to do so.
Note that is is not possible to add new items with this function,
use touch_rules if you want to add new items to your project.
fit_domains, profile_plot for
possible uses of item_properties