in my scripts, I loop through the table build out variables dynamically.
In the dashboard I creating a table using id as the dimension and Maxtstring(var) is my expression. How can I evaluate the variables and get the value?
It's not possible because within the UI is no classical evaluate() available. The only exception is a $-sign expansion but it creates an ad-hoc variable which has always a single global value which is evaluated at first and then applied to all rows / columns - means you couldn't apply it within a dimensional context.