Hi Mirko,
Thank you for your reply! I have a few follow up questions:
1. Can you expand on what you mean by traffic volume scaling? Is it
essentially the number of vehicles that would be in the simulation? For
example, if there are originally 2 vehicles but the scaling
min(options.incStart
+ options.incValue * float(step + 1) / options.incBase, options.incMax) *=
1/2 *would result in 2*(1/2) = 1 vehicle in the simulation.
2. This works, thank you!
3. I don't believe you answered this question, any insight would be
appreciated: How do we tell if the iterations have reached an
equilibrium? Which output variable should we observe?
4. Attached is a sample file tripinfo_000.xml, which does not seem to
have a duration section. How can I make sure it has a duration section?
1. here is the command I am running for reference "*python
../sumo/tools/assign/duaIterate.py -n siouxFalls.net.xml -t
siouxFalls.trips.xml -l 10 --max-convergence-deviation 1
--convergence-iterations 2 --addweights siouxFalls.weight.xml
--time-inc 5*
"
5. Got it, thanks!
Please let me know if you have any additional insight. Thank you so much!
Best,
James
On Tue, Sep 12, 2023 at 1:01 AM Mirko Barthauer <[email protected]>
wrote:
> Hi James,
>
>
>
> you can discover more about the duaiterate.py options by calling it with
> --help. Many of your questions are addressed on this doc page
> <https://sumo.dlr.de/docs/Demand/Dynamic_User_Assignment.html#iterative_assignment_dynamic_user_equilibrium>
> .
>
>
>
> 1. --inc* options are about traffic volume scaling and provide components
> of the scale equation used in duaiterate: If --inc-base is defined, it's
> *min(options.incStart
> + options.incValue * float(step + 1) / options.incBase, options.incMax)*,
> --inc-max otherwise. --time-inc (seconds) is about the simulation duration
> defined by the equation *options.timeInc * (step + 1)*.
>
>
>
> 2. Options for duarouter can be passed by prepending "duarouter" to them
> and putting them at the end of the options. So it should read something
> like "duarouter--weight-attribute cost"
>
>
>
> 4. Could be that the duration section is missing. Cannot say more without
> the files.
>
>
>
> 5. Currently not possible.
>
>
>
> Best regards
>
> Mirko
>
>
>
> -----Original-Nachricht-----
>
> Betreff: [sumo-user] Questions about duaiterate.py
>
> Datum: 2023-09-07T22:10:50+0200
>
> Von: "James Cheng via sumo-user" <[email protected]>
>
> An: "Sumo project User discussions" <[email protected]>
>
>
>
>
>
>
>
> Dear SUMO Staff,
>
>
>
> I am trying to use duaiterate.py and I have a few questions regarding its
> use:
>
> 1.
>
> I am running into issues caused by long iteration times and am looking
> into ways to speed up iterations. What do the following flags do
> (short description) and what are their units (i.e. seconds, minutes,
> etc.)? Is there an example usage of these or is there a directory that
> contains more info about these flags that we can refer to?
>
>
> -
>
> --inc-start, --inc-base, --inc-max, --incrementation, --time-inc
>
>
> 1.
>
> I’m trying to add weights for the duarouter section because I would
> like to use my own definition of cost = travel time + tolling as a weight.
> I am using the “--addweights” flag with a weight file for the additional
> weights, but how do I specify the weight attribute?
> 1.
>
> Using duarouter, I was able to do “--weight-attribute cost”, but is
> there a flag like that for duaiterate.py?
> 2.
>
> How do we tell if the iterations have reached an equilibrium? Which
> output variable should we observe?
> 3.
>
> When I run
>
> python ../sumo/tools/assign/duaIterate.py -n siouxFalls.net.xml -t
> siouxFalls.trips.xml -l 10 --max-convergence-deviation 1
> --convergence-iterations 2 --addweights siouxFalls.weight.xml --time-inc 5"
>
> I get the following error after running through iteration 000:
>
>
>
> File "...\sumo\tools\assign\duaIterate.py", line 688, in main
>
> avgTT.add(sum / count)
>
> ZeroDivisionError: float division by zero
>
> I am not sure why the count variable is zero – could it be that my
> tripinfo_000.xml does not have a duration section? I would like to use
> the “--max-convergence-deviation” flag to automatically stop iterations
> after converging, but I am not sure how to fix this division by zero error.
>
>
> 1.
>
> How do we store the duaiterate dump folders (e.g. 000, 001, 002, etc.) in
> a separate folder such as a dump_folder folder? Currently, it is
> dumping them into the current directory.
>
>
> Please advise us on these questions, and let us know if you have any
> clarifications. Thank you so much for your help!
>
>
>
> Best,
>
> James
>
>
--
James Cheng
B.A. Computer Science and B.S. Business Administration
University of California, Berkeley
<?xml version="1.0" encoding="UTF-8"?>
<!-- generated on 2023-09-13 06:39:57 by Eclipse SUMO sumo Version 1.18.0
<configuration xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:noNamespaceSchemaLocation="http://sumo.dlr.de/xsd/sumoConfiguration.xsd";>
<input>
<net-file value="000/../siouxFalls.net.xml"/>
<route-files value="000/siouxFalls_000.rou.xml"/>
<additional-files value="000/../edgedata.add.xml"/>
</input>
<output>
<output-prefix value="000/"/>
<summary-output value="000/../summary_000.xml"/>
<tripinfo-output value="000/../tripinfo_000.xml"/>
</output>
<time>
<begin value="0"/>
<end value="5"/>
</time>
<processing>
<route-steps value="200"/>
<no-internal-links value="False"/>
<time-to-teleport value="300"/>
<time-to-teleport.highways value="0"/>
<eager-insert value="False"/>
</processing>
<report>
<verbose value="true"/>
<no-warnings value="False"/>
<log value="000/../iteration_000.sumo.log"/>
<no-step-log value="true"/>
</report>
<random_number>
<random value="False"/>
</random_number>
</configuration>
-->
<tripinfos xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:noNamespaceSchemaLocation="http://sumo.dlr.de/xsd/tripinfo_file.xsd";>
</tripinfos>
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