Hi, We recently discovered that multimeter returns membrane potential in some unordered way so if we want to record the last state of a group of neurons and then to continue simulation from exactly the same state we were unable to reconstruct it properly.
Is there a way to record the membrane potential together with neuron ID?
Best,Petia Koprinkova-Hristova
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
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 _______________________________________________ NEST Users mailing list -- users@nest-simulator.org To unsubscribe send an email to users-leave@nest-simulator.org
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 themulitmeter documentation https://nest-simulator.readthedocs.io/en/stable/models/multimeter.html.
cheers, Jessica
On 29.01.24 15:01, Petia Koprinkova wrote:
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 _______________________________________________ NEST Users mailing list -- users@nest-simulator.org To unsubscribe send an email to users-leave@nest-simulator.org
NEST Users mailing list --users@nest-simulator.org To unsubscribe send an email tousers-leave@nest-simulator.org
Thank you Jessica!Best,Petia
On Wednesday, January 31, 2024 at 02:43:39 PM GMT+2, Jessica Mitchell j.mitchell@fz-juelich.de wrote:
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
On 29.01.24 15:01, Petia Koprinkova wrote:
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 _______________________________________________ NEST Users mailing list -- users@nest-simulator.org To unsubscribe send an email to users-leave@nest-simulator.org
_______________________________________________NEST Users mailing list -- users@nest-simulator.orgTo unsubscribe send an email to users-leave@nest-simulator.org -- -------------------------- 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 _______________________________________________ NEST Users mailing list -- users@nest-simulator.org To unsubscribe send an email to users-leave@nest-simulator.org
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Hans Ekkehard Plesser -
Jessica Mitchell -
Petia Koprinkova