Graph

Hi

I have a series of graphs for which the underlying data is updated each month. I do not want the graphs to pick up "empty" months so am currently manually changing the 'source data' each month to add the new months data - is there a way that the graph can automatically identify that there is a new months data and automatially update the source data in the chart or does this task have to be performed manually each month?

Cheers
NICK