I have this VBA function for drawing charts in Excel 2013:
Sub DrawChart2(obj_worksheetTgt As Worksheet, ByVal XLabels As Range, ByVal DataValues As Range, B
You cannot use named ranges for .XValues or .Values, but you can change the .Formula property by replacing the series formula
For more information on editing the series formula see http://peltiertech.com/change-series-formula-improved-routines/
Note of caution, there is a bug in Excel 2013 that prevents you from using named ranges starting with "R" or "C" when using VBA to change the series formula; see http://answers.microsoft.com/en-us/office/forum/office_2013_release-excel/named-range-use-in-chart-series-formulas-causes/c5a40317-c33f-4a83-84db-0eeee5c8827f/?auth=1&rtAction=1466703182593