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Re: [sumo-user] [OD2TRIPS]
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- From: Michael Behrisch <oss@xxxxxxxxxxx>
- Date: Tue, 7 May 2019 19:36:44 +0200
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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: dicostanzo.luca@xxxxxxxxx <mailto:dicostanzo.luca@xxxxxxxxx>
> skype: lucadicostanzo82
> tel: +39 333 43 92 544
>
>
> Il giorno mar 7 mag 2019 alle ore 15:50 Luca Di Costanzo
> <dicostanzo.luca@xxxxxxxxx <mailto:dicostanzo.luca@xxxxxxxxx>> 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: dicostanzo.luca@xxxxxxxxx <mailto:dicostanzo.luca@xxxxxxxxx>
> skype: lucadicostanzo82
> tel: +39 333 43 92 544
>
>
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