I made a chart with a dashboard-type histogram.
selecting a month histogram displays a single bar on the selected month.
I need however, that selecting a month graph shows the selected month and 12 months.
example if I select March 2015 the histogram must display data from March 2014 to March 2015 January 2015 if I select data from January 2014 to January 2015.
someone would know give me directions on how to do?