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Nice! I wonder if the Survival Analysis functionality would be useful here: https://reference.wolfram.com/language/guide/SurvivalAnalysis.html In particular: https://reference.wolfram.com/language/ref/SurvivalModelFit.html
[RecurrenceTable][1] is what you think of as NRSolve. [1]: http://reference.wolfram.com/language/ref/RecurrenceTable.html
[quote=Min Peng]Another version with PieChart: data = Table[RandomInteger[{5, 100}, RandomInteger[{8, 12}, 1]], {10}]; PieChart[data, SectorOrigin -> {{Pi/2, -1}, 1}, SectorSpacing -> None] It would be nice to have more meaningful...