Translations:Question types/42/en
From LimeSurvey Manual
This question types allows survey administrators to a create large arrays with numbered dropdown boxes with a set of subquestions on the "y-axis", and another set of subquestions on the "x-axis".
You can also set a special question attribute to use this question type with checkboxes:
Example 1: Example_Array_Numbers
Example 2: Example_Array_Numbers_Checkboxes