Button to select Year-over-Year

[#1]

I am using Qlikview 11 and similar to another QLikview system I use for a retailer. When you select a timeframe (eg Jan2015-Mar2015) they have a button called "Auto Match" in which selects the same timeframe but the previous (egJan2014-Feb2014) year giving Year-over-Year sales. How do I set up a button to do this?

[maxgro]

use a calendar and set analysis in expressions

iqlik wordpress com/2010/11/27/the-magic-of-set-analysis-point-in-time-reporting/