Some outputs such as meanData output allow setting begin and end times for their output. For fcd-output this is not possible directly. There are several workarounds: - export output for the whole simulation, then cut of the undesired parts in post-processing (the output is order by time which makes this easy) - save the simulation state at some point. Then load the simulation from this state and start the output ( https://sumo.dlr.de/docs/Simulation/SaveAndLoad.html#know_issues) - only equip some of the vehicles with a fcd device but set a large radius that covers the whole network (device.fcd.radius). The output will then be limited to the time where these vehicles active
regards, Jakob Am Mi., 25. März 2020 um 22:00 Uhr schrieb Leonardo Solé Rodrigues < leos...@poli.ufrj.br>: > Thanks for the reply. > Is there a way to simulate a longer time period, but just export a smaller > window of it? > > Em qua, 25 de mar de 2020 17:48, Jakob Erdmann <namdre.s...@gmail.com> > escreveu: > >> Hello, >> the low number if vehicles at the start is typical because the networks >> starts empty and has to fill up. >> The high number of vehicles later in the simulation occurs because that >> scenario is horribly congested. Mostly due issues with the network ( >> https://sumo.dlr.de/docs/Data/Scenarios/TAPASCologne.html#quality). I'm >> planning to release an updated version of the scenario this year. >> Until then you could down-scale the traffic demand to avoid the worst >> congestion (--scale 0.5 or lower) >> >> regards, >> Jakob >> >> >> Am Mi., 25. März 2020 um 21:20 Uhr schrieb Leonardo Solé Rodrigues < >> leos...@poli.ufrj.br>: >> >>> I'm new to SUMO, and I'm trying to export some traces, so I can use them >>> in python. I exported some FCD Output (xml) files from a simulation, >>> each with a 10 minute length, at different starting times. I'm using the >>> traces from this project <http://kolntrace.project.citi-lab.fr/>. They >>> all go from around 20 vehicles in the starting seconds to around 10000 to >>> 20000 in the last seconds. I exported these files using the --fcd-output >>> option, and giving a begin and end times. Why do the number of vehicles >>> change so much? Is there a way I can fix this? >>> >>> Below is a plot of the number of vehicles in each timestep in one of the >>> files. >>> >>> -- >>> Leonardo Solé Rodrigues >>> _______________________________________________ >>> sumo-user mailing list >>> sumo-user@eclipse.org >>> To unsubscribe from this list, visit >>> https://www.eclipse.org/mailman/listinfo/sumo-user >>> >> _______________________________________________ >> sumo-user mailing list >> sumo-user@eclipse.org >> To unsubscribe from this list, visit >> https://www.eclipse.org/mailman/listinfo/sumo-user >> > _______________________________________________ > sumo-user mailing list > sumo-user@eclipse.org > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user >
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