This solution definitely has the right idea. This is the data set (after sorting) that was produced from your code. Let's say each two timestamp represents an interval we want to examine. So for example, for ID 123, (1/10, 1/14) is the first interval, (1/15, 1/17) is the second interval, and so on. According to this rule, on 1/11 there should be 5 counts of unique ID numbers (123, 124, 125, 126, and 127--NOT 128). I basically want this count reflected on the graph. Here is the graph that was produced from the data set: I don't know if I'm making this more complicated than it should be.... It's okay if there is no straightforward solution. Suggestions are still appreciated. 🙂
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