Can you provide some sample data that represents your situation, and mock-up what you want the end result to look like?
How about something like the workbook I attached at The specified item was not found. It is a combination of what I consider a clustered bar chart and a line chart.
The solution in the link you provided uses a level parameter (a calculated field based on a term placed in the data to determine data bins), incrementing the distance of each bar 0.25. To me that is a lot of extra data manipulation to get what is usually something called a multiple series. Using a date for the interval (a very common practice) won't work in this case, as it is not practical to add a fraction to a date when the date is on the axis. Is there some methodology of doing this without the extra data manipulation. I don't mean to sound critical of the product (which I think preforms very well in other aspects), but please take as feedback, side bar charts has been an industry standard since charting was conceived. Not having this functionality built in is disappointing (at least to me). It is the way most people prefer to compare two data series, and is almost always a given when doing data analytics.
I understand the software is designed to present the data differently than conventional graphing software. It would be nice to see this a future development.
I agree Scott, a clustered column/bar chart is missing from the charting options in Tableau, and the method I shared with you is something of a kludge to force Tableau to draw a what looks like a clustered chart.
It would be very nice if this was a chart option. I recommend you post a thread in the "Wouldn't it be nice.." section of this forum describing why you think this would be worthwhile addition and a use case.
I am trying to make a similar chart. I cannot find the link that you said you shared with Scott, would you mind sending it to me?