Hi Meredith, As you can see below, there is the start day is represented as 0, I would like 1. Let's consider that today I have a test at day 1 the begining of the process. However 3 days ago I also had a preliminary test, this day should be represented as day -3 and not -2. Because there should not be a point 0 on the time axis. do you think this is a possibilty?
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