Gaps between bar sets in graph

[Confuddled]

Hi,
I'm looking for a way to seperate sets of bars in a graph. I've been inserting a gap by inserting a column between the data, which isn't ideal. Is there a 'proper' way to do it? A tick box or something?!?!
Thanks!

 

[oldbrewer]

visit jon peltier's website - he is the chart guru...........

 

[Jon Peltier]

What does the data and chart look like before you generate a gap, and where should the gap be placed? Sometimes a blank row or column is just what you need.