Please consider the following very simple example attached
For each row I have a date and a count of things. In among that time line there are a few milestones
How can I plot the count of things over time and 'superimpose' the milestone dates as 'points' on the chart ?
I know this would be easy if I had a a column for milestone type and milestone date value .. but I don't... I actually have a very large table as per the example and can't manipulate the data outside of Tableau
(see https://community.tableau.com/docs/DOC-5521 for the 'easy' answer)
Can you provide an example of how you're looking to visualize this?