(Internal) Select item from a shadowtest
selectItemFromShadowTest( shadow_test, position, simulation_constants, x, previous_selection )
shadow_test
: a data.frame
containing a shadowtest.position
: the item position, ranging from 1 to test length.simulation_constants
: a named list containing simulation constants.x
: a output_Shadow
object.previous_selection
: a named list containing item selection from previous position.a named list containing data on the selected item.