for some reason the original message did not post, here is my question:

I have created a table that I wanted displayed in a bar graph, by quarter, representing what percentage of the population are positive for a particular test. For some measures I need to be able to do a subbar, breaking down the percentage by source.

Currently I am able to do this but not without creating a "rest" group which then creates a text percentage in the white space above the graph. This is because it truly is there we just colored it white so it wouldn't show up. Also, the percentage values do not correspond with the Y axis. Each quarter is representing a percentage of the total dataset--this is where I believe we need the group by function.