Inline load and period calculation

[Peony]

Hi

I create a menu with which I will manage the periods for calculating data in the dashboard. To do this, I create such a table inline:

Period_Level:
LOAD * INLINE [
    Period_Level, Period_Calc,
    Today,		  'Num(Today())'	
    7Days,        'Num(Today()-6)'
    30Days,       'Num(Today()-29)'
    90Days,       'Num(Today()-89)'
];

Then I create a variable that I will use in the set analysis and get not the numeric period value as I expected, but just a string (see below)

What I get (in the expression preview)

I what I expected to see (in the expression preview)

So, the question is why I can't get num value using Period_Calc field in the expression? Please, help to understand. 

[lorenzoconforti · Accepted solution]

You need to use $ sign expansion again. The first time you use it you bring in the field; the second time you evaluate what is included in the field

{"=$(=$(=Period_Calc))"}

[Peony]

Lorenzo, thank you for help, it works!