Qlikview - calculate graph dimension from list box selection

[#1]

Greetings, Qlikview gurus!

I've got a page with two graphs on it, Graph A and Graph B, plus a list box with "Period" values in it.

Graph A should show results for whichever period the user selects in the "Period" list box. Graph B should show results for the period exactly one year before the period selected in the "Period" list box.

So, for example, if the user selects a period of "201701" in the list box, Graph A should show the results for "201701".  Graph B should then show results for "201601".

Easy enough on Graph A, but what about Graph B?  I've tried various forms of calculated dimension, but so far, no luck.  Any suggestions?

Thanks in advance!

Joel

[vishsaggi]

Can you share your expression for Graph B? And need to know the format for Period field?

= Sum({$< Period = {"= $(=  Date(MakeDate(Year(Date#(Period, 'YYYYMM'))-1, Month( Date#(Period, 'YYYYMM'))),'YYYYMM') "}>} Sales)

[aarkay29]

Create variable

vPeriod =Date(ADDYEARS(Period,-1),'YYYYMM')

In chart B

give expression sum({<Period={"$(=$(vPeriod))"}>}Field)