If you are using QlikView11 and up, you can use conditional dimensions (check the demo app What's New in QV11 on how to do this).
Or, alternatively, create an input box with a variable and predefined values that match your dimension field names.
Then expand your variable in your dimension definition.
Many Thanks for your input.
I am using QV11, but unfortunately was not able to find "What's New in QV11" QV document.
Enclosed is the Qlikview file with two scatter chart. I want one scatter chart with an option R date1, R date2 to select & according it takes the X axis.