Hi Petia,

just for your information, the 'voltmeter' is just a pre-configured 'multimeter' that is set to record the voltage. It's only briefly mentioned in the mulitmeter documentation.

cheers,
Jessica

Thank you Hans!

Actually we used multimeter. In NEST documentation exact information about voltmeter is missing or we did not discovered it.

Best,

Petia

On Monday, January 29, 2024 at 03:47:00 PM GMT+2, Hans Ekkehard Plesser <hans.ekkehard.plesser@nmbu.no> wrote:

Hello Petia,

I am not quite sure if I understand your problem. The voltmeter records time, sender and voltage for each data point. In the following example, it records the voltage of two neurons. Then

voltmeter.get('events')

returns

{'senders': array([1, 2, 1, ..., 2, 1, 2]),
'times': array([  1.,  1.,  2., ..., 998., 999., 999.]),
'V_m': array([-68.56875477, -70.        , -67.27371053, ..., -69.89028023,
        -57.39686729, -69.90055242])}

Entries in the senders, times and V_m arrays correspond to each other, so you can group data by sender.

Also when recording to file, sender information is recorded:

# NEST version: 3.5
# RecordingBackendASCII version: 2
sender    time_ms    V_m
1    1.000    -68.569
2    1.000    -70.000
1    2.000    -67.274
2    2.000    -70.000

Best,

Hans Ekkehard
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-- 
--------------------------
Dr. Jessica Mitchell (she/her)

Institute of Neuroscience and Medicine (INM-6)
Computational and Systems Neuroscience
Jülich Research Centre
Jülich, Germany
http://www.csn.fz-juelich.de


Email: j.mitchell@fz-juelich.de
Building 15.9 Rm 2001b
Phone: +49 2461 61 85457