Luke M, the examples in that webpage show how to work with dates set in a single column.
My dates span multiple columns i.e.:
Column Labels (5 Each)=
Location, 12/12/2011, 12/19/2011, 1/2/2012, 1/9/2012
Five columns of data (1st Column = ROW Labels):
1, 10, 11, 12, 21,
2, 9, 4, 12, 8,
3, 17, 16, 12, 32,
4, 5, 4, 4, 9,
AVG, 10.25, 8.75, 10, 17.5,
I want my chart update when a new week is added.