Shifted graph

[ilze2]

Hello!
I want to make graph, which is shifted by date. It means, in chart would be 2 lines: one shows current values, another values of previous day.
I tried something like:
if(Date = date($(vDat)), Sum({<Date = {"=date($(vDat)-1)"}>} page_impressions))
where vDat is date as number, but it does not work. What I am doing wrong?
Thank You in advance!

[Thiago_Justen_]

Hi there,

Please take a try:

if(Date = date('$(vDat)'), Sum({<Date = {"$(=date(`$(vDat)`)-1)"}>} page_impressions))

[ilze2]

Sorry, it does not work