Variables and calculated dimensions

[#1]

Hi ;

I have a bar graph with the following calculated dimension:

=if([Report Type]='Daily Report',[Carrier Alt Carrier Designator],

  if([Report Type]='Weekly Report',[YearWeek], 

   if([Report Type]='Monthly Report',[DropMonth],

    if([Report Type]='Overall Summary',[Load Group]))))

My expression is as follows:

=Round(sum(aggr(sum(DISTINCT if([Load Status] <>'Voided' and [Load Status]<>'Expired' ,[Weight (kg)])), [Lean ID])),1)/1000

If l select, report type 'Weekly report' , my dimension on the graph is [YearWeek] which is correct.

I have also created 2 variables, vmaxPeriod (calculated as max(YearWeek)) and vmaxPeriod_3 (calculated as max(YearWeek)-3).

I now want to limit dimensions displayed i.e. vMaxPeriod_3<=YearWeek<=vMaxPeriod.

How do l do this? Please assist.

Regards;

Moses