Re: [sumo-user] --binomial option

[Raheleh Zarei <raheleh.zarei@xxxxxxxxx>]

Yes, I already tried the  --binomial and understand how it works. But because I need to create flow instead of trips, I have to use --flow option.

I need to create files, with a certain number of flows, fromJunction toJunction, each with the probability of 0.5.

The command line I use is 

python myRandomTrips.py -n eichstaett.net.xml -o ./Trips$j/RoutingSim$i.rou.xml --random true -b 0 -e 500  --binomial  --flow $j --junction-taz true

how should I fix it to have something like this?

<flow id="0#0" begin="0" end="500" probability="0.5" fromJunction="1223" toJunction="2034"/>
    <flow id="1" begin="0" end="500" probability=" 0.5 " fromJunction="1232" toJunction="1839"/>
    <flow id="2" begin="0" end="500" probability=" 0.5 " fromJunction="1496" toJunction="2294"/>
    <flow id="3" begin="0" end="500" probability=" 0.5 " fromJunction="909" toJunction="1232"/>
    <flow id="4" begin="0" end="500" probability=" 0.5 " fromJunction="1520" toJunction="2097"/>
    <flow id="5" begin="0" end="500" probability=" 0.5 " fromJunction="2160" toJunction="1979"/>
    <flow id="6" begin="0" end="500" probability=" 0.5 " fromJunction="1348" toJunction="1438"/>
    <flow id="7" begin="0" end="500" probability=" 0.5 " fromJunction="1341" toJunction="785"/>
    <flow id="8" begin="0" end="500" probability=" 0.5 " fromJunction="461" toJunction="2284"/>
    <flow id="9" begin="0" end="500" probability=" 0.5 " fromJunction="1801" toJunction="2284"/>

On Mon, May 25, 2020 at 10:12 AM Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:

This is, because you are setting the option --binomial 2.

The whole point of this option is to enable probabilistic departures with a per-second probability > 1. (The probability option needs to be smaller than 1 or you will get deterministic behavior). The probability is divided by the value given to --binomial and the number of flows is increased instead.

Am Mo., 25. Mai 2020 um 15:56 Uhr schrieb Raheleh Zarei <raheleh.zarei@xxxxxxxxx>:

I tried it with different numbers, that also creates two flow for the same origin-destination pair. e.g. if I put 2 it gives me 4, and if I put 4 it gives me 8 which is 4 pairs. each pair are identical but with a different id.

    <flow id="0#0" begin="0" end="500" probability="0.5" fromJunction="1951" toJunction="1131"/>
    <flow id="0#1" begin="0" end="500" probability="0.5" fromJunction="1951" toJunction="1131"/>
    <flow id="1#0" begin="0" end="500" probability="0.5" fromJunction="1968" toJunction="1931"/>
    <flow id="1#1" begin="0" end="500" probability="0.5" fromJunction="1968" toJunction="1931"/>
    <flow id="2#0" begin="0" end="500" probability="0.5" fromJunction="2495" toJunction="2496"/>
    <flow id="2#1" begin="0" end="500" probability="0.5" fromJunction="2495" toJunction="2496"/>
    <flow id="3#0" begin="0" end="500" probability="0.5" fromJunction="2141" toJunction="818"/>
    <flow id="3#1" begin="0" end="500" probability="0.5" fromJunction="2141" toJunction="818"/>

On Mon, May 25, 2020 at 2:18 AM Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:

This is due to your use of --flow 1. If you want more origin-destination pairs you need to increase the number of flows.

Am Mo., 25. Mai 2020 um 06:58 Uhr schrieb Raheleh Zarei <raheleh.zarei@xxxxxxxxx>:

Hello,

When I use  --binomial with rondomTrip.py to create flows, it creates two exact same trips as the output.

My command line is:

 python randomTrips.py -n eichstaett.net.xml -o RoutingSim1.rou.xml --random true -b 0 -e 500  --binomial 2 --flow 1 --junction-taz true

and this is the output:

    <flow id="0#0" begin="0" end="500" probability="0.5" fromJunction="1955" toJunction="144"/>
    <flow id="0#1" begin="0" end="500" probability="0.5" fromJunction="1955" toJunction="144"/>

I was wondering why it does that and how can I fix it.

Thanks,

Raheleh

--

RAZ

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RAZ

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RAZ