Hello,
Question code is Q1.
X-Scale is "X1, X2, X3..."
Y-Scale is "Y1, Y2, Y3..."
So, if you want the first column (X1) to be numeric, you use the function "is_numeric".
www.limesurvey.org/manual/Expression_Man...mplemented_Functions
In this case you enter in question validation equation.
(is_numeric(Q1_Y1_X1)) AND (is_numeric(Q1_Y2_X1)) AND (is_numeric(Q1_Y3_X1))...
Furthermore you can enter a message about this like "first column must be numeric" in question validation tip
If you want to allow only specific values (whole numbers 1-10) you have to add this to the validation, like
Only whole numbers: is_int instead of is_numeric.
It will be a bit longer like:
(is_int(Q1_Y1_X1) AND (Q1_Y1_X1>0) AND (Q1_Y1_X1<11)) AND (same for Y2, Y3,...)
Of course you can use a regular expression like /^[0-9]{1,2}$/ for numbers between 0 and 99.
Best regards
Joffm