Hi, SUMO adds a vehicle to the current time slice using randomized rounding, see the code here: https://github.com/eclipse/sumo/blob/master/src/od/ODMatrix.cpp#L145 but as far as I can tell from the current code and our tests the sum for each OD cell over time should only deviate by at most 1 from the input even when using fractional values.
Can you share your inputs? Best regards, Michael Am 07.05.19 um 18:21 schrieb Luca Di Costanzo: > Jackob for some OD pair I have always number smaller than 1 but the sum > give me a number greater than 1. After OD2TRIPS I got that, as flow, > zero as value of generated vehicles instead, for trips I got 480 > vehicles (the sum of OD matrix is around 445). > > So I think that, in trip generation TRIPS there's a methodology he use > to generate trips even from decimal numbers but I, still, cannot > understand which is the one > > > Ing. Luca Di Costanzo > > ----------------------------- > MsC in Hydraulic and Transportation Engineering > Bsc in Civil Engineering > contact: [email protected] <mailto:[email protected]> > skype: lucadicostanzo82 > tel: +39 333 43 92 544 > > > Il giorno mar 7 mag 2019 alle ore 15:50 Luca Di Costanzo > <[email protected] <mailto:[email protected]>> ha scritto: > > Hi all, > > I want to ask people how SUMO (and more specificly OD2TRIPS) > consider the presence of real number (basically with decimal points) > in a OD matrix. > > I have and OD matrix like the one I attacched to the message and I'm > trying to figure out the result in term of trips. Some other > software generates the total number of vehicles (supposing the sum > is 6.95 they generates 7 vehicle) randomly on some OD. > > Is SUMO works in the same mode or not? Thanks in advance > > Ing. Luca Di Costanzo > > ----------------------------- > MsC in Hydraulic and Transportation Engineering > Bsc in Civil Engineering > contact: [email protected] <mailto:[email protected]> > skype: lucadicostanzo82 > tel: +39 333 43 92 544 > > > _______________________________________________ > sumo-user mailing list > [email protected] > To change your delivery options, retrieve your password, or unsubscribe from > this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user >
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