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Translations:Expression Manager examples/99/en

From LimeSurvey Manual

Purpose Validate number of boxes ticked per row
Type Validation
Example Question of type "Array Numbers (Checkbox Layout)"
Expression sum(...)
Description (sum(Test_A_1, Test_A_2, Test_A_3, Test_A_4, Test_A_5) <= X) determines whether at least X checkboxes in row A are checked.
If you want to check all three rows (A, B, C), you can connect the expression using "&&":
(sum(Test_A_1, Test_A_2, Test_A_3, Test_A_4, Test_A_5) <= X)
&& (sum(Test_B_1, Test_B_2, Test_B_3, Test_B_4, Test_B_5) <= X)
&& (sum(Test_C_1, Test_C_2, Test_C_3, Test_C_4, Test_C_5) <= X)
Steps Create/edit question of type "Array Numbers (Checkbox Layout)".
Insert the above expression into "Question validation equation" at the advanced question settings (you might have to adjust variable namings!).
Sample File Validate number of boxes ticker per row for an Array (Numbers) Checkbox.lss
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