| Re: [sumo-user] Using random seed |
|
Thank you so much for your answer Jakob!
To answer your question (Just
for clarity: are you comparing simulation runs with different values of --seed?):
Yes,
that's exactly what I was trying to do.
With
your suggestion, I was able to see the randomness that I was looking for!
Thanks!
From: sumo-user <sumo-user-bounces@xxxxxxxxxxx> on behalf of Jakob Erdmann <namdre.sumo@xxxxxxxxx>
Sent: Thursday, March 4, 2021 2:05 AM To: Sumo project User discussions <sumo-user@xxxxxxxxxxx> Subject: Re: [sumo-user] Using random seed 1) sigma (for the default carFollowModel) controls random slow-downs. Vehicles drive slower than their preferred/optimum speed in any given situation. This leads to a "ragged" look of the speed curve even in free flow conditions. In contrast, speedDev
controls the deviation of preferred speed. This set a fixed random speedFactor value for each vehicle so in the absense of sigma each vehicle would drive with a constant speed in free flow but each vehicle would do this at a different speed.
2) departure time is only affected directly if option --random-depart-offset is set. You may see some effects from sigma and speedDev due to departDelay-interactions at high density though. Vehilce type drawing should be affected though.
Just for clarity: are you comparing simulation runs with different values of --seed?
Am Mi., 3. März 2021 um 20:10 Uhr schrieb Bae, Jong In <jbae42@xxxxxxxxxx>:
|