This is a bug: the ego vehicle is always returned (
https://github.com/eclipse/sumo/issues/4088)
When there are more vehicles around, they will be returned as well.

regards,
Jakob

2018-05-15 13:06 GMT+02:00 Surya Soman <[email protected]>:

>   Thank you Jakob!  The code is working now.
>
> But unfortunately the vehicle speed and position I'm getting at each step
> is the ego vehicle's speed and position were I wanted to retrieve the speed
> and position of  the vehicles around my ego vehicle.
>
> Could you help me with this. Thanks in advance!
>
> Regards,
> Surya Soman
>
>
> On Mon, May 14, 2018 at 8:50 AM, Jakob Erdmann <[email protected]>
> wrote:
>
>> try using curly brackets vor varIDs:
>> {traci.constants.VAR_SPEED,traci.constants.VAR_POSITION}
>>
>> 2018-05-11 10:16 GMT+02:00 Surya Soman <[email protected]>:
>>
>>> Hi ,
>>>
>>> I'm a new user of SUMO. As a part of my research, I was trying a code to
>>> access the speed and position of the vehicles around my ego vehicle
>>> using Traci vehicle contextsubscription command. Given below is the
>>> command I used:-
>>>
>>> traci.vehicle.subscribeContext('2567#6',...
>>>        traci.constants.CMD_GET_VEHICLE_VARIABLE, 20,...
>>>        [traci.constants.VAR_SPEED,traci.constants.VAR_POSITION]);
>>>
>>>
>>> It is giving an error :-
>>>
>>> Error using vehicle.subscribeContext
>>> The value of 'varIDs' is invalid. It must satisfy the function: iscell.
>>>
>>> Error in traci.vehicle.subscribeContext (line 34)
>>> p.parse(vehID, domain, dist, varargin{:})
>>>
>>> Error in vehicleconsub (line 58)
>>>        traci.vehicle.subscribeContext('2567#6',...
>>>
>>>
>>> Could anyone help me with this. Thanks in advance !
>>>
>>>
>>> Regards,
>>> Surya
>>>
>>>
>>>
>>>
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>>
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