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EdgeAndEventGenerations.md

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Symbols and Functions > WolframModel and WolframModelEvolutionObject > Properties >

Edge and Event Generations

"EdgeGenerationsList" (aka "ExpressionGenerations") yields the list of generation numbers (numbers of predecessor layers) for each edge in "AllEventsEdgesList":

In[] := WolframModel[{{1, 2}, {1, 3}, {1, 4}} ->
  {{2, 2}, {3, 2}, {3, 4}, {3, 5}},
 {{1, 1}, {1, 1}, {1, 1}}, 5, "EdgeGenerationsList"]
Out[] = {0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5,
   5, 5, 5, 5}

"AllEventsGenerationsList" (aka "EventGenerations") gives the same for events. The generation of an event is defined as the generation of edges it produces as output. Here edges of different generations are colored differently:

In[] := With[{
  evolution = WolframModel[{{1, 2}, {1, 3}, {1, 4}} ->
     {{2, 2}, {3, 2}, {3, 4}, {3, 5}},
    {{1, 1}, {1, 1}, {1, 1}}, 5]},
 MapThread[
  HypergraphPlot[#, EdgeStyle -> #2] &, {evolution["StatesList"],
   Replace[evolution[
        "EdgeGenerationsList"][[#]] & /@ (evolution[
         "StateEdgeIndicesAfterEvent", #] &) /@
      Prepend[0] @ Accumulate @ evolution["GenerationEventsCountList"],
    g_ :> ColorData["Rainbow"][g/5], {2}]}]]

Event and expression generations correspond to layers in "LayeredCausalGraph" and "ExpressionsEventsGraph":

In[] := WolframModel[{{1, 2}, {1, 3}, {1, 4}} ->
  {{2, 2}, {3, 2}, {3, 4}, {3, 5}},
 {{1, 1}, {1, 1}, {1, 1}}, 5, "AllEventsGenerationsList"]
Out[] = {1, 2, 3, 4, 5, 5}
In[] := WolframModel[{{1, 2}, {1, 3}, {1, 4}} ->
  {{2, 2}, {3, 2}, {3, 4}, {3, 5}},
 {{1, 1}, {1, 1}, {1, 1}}, 5, "LayeredCausalGraph"]