30 Nov
2021
30 Nov
'21
12:15 p.m.
Hi Robin!
We consciously decided against that many many times to avoid a fat
interface and ending up in a situation where we have to maintain
hundreds of special functions in our interfaces (C++, Python, SLI). I
mean, where would you stop? Input_SD.events["times"] could be
get_spike_times(), Input_SD.events could be get_events(), and so on...
Performing "function calls" via SetStatus is an easy way of achieving a
minimal and maintainable interface and I have not yet seen an easier way
to achieve the same. I am, however, open to suggestions!
On this specific topic, the documentation should definitely improved,
though.
Cheers,
Jochen!
On 30.11.21 12:04, Robin Gilbert De Schepper wrote:
As an aside, if `Input_SD.n_events = 0` is the
canonical way of
clearing a spike recorder, maybe a `clear` function could be added.
That's a bit easier to document and find?
On Mon, 29 Nov 2021, 22:24 Jochen Martin Eppler,
<j.eppler(a)fz-juelich.de> wrote:
Dear Maryada,
I have just played a bit with your example (see attachment for a
slightly extended and reformatted version) and as far as I can
see, NEST behaves exactly as expected (and documented).
Please let me explain:
*
When using the recording backend |ascii|
<https://nest-simulator.readthedocs.io/en/v3.1/models/recording_backend_ascii.html>
with the kernel attribute |overwrite_files|
<https://nest-simulator.readthedocs.io/en/v3.1/ref_material/pynest_apis.html#nest.NestModule.overwrite_files>
set to |True|, you have to move files away at the location in
your script saying |do something|, otherwise the data files
get overwritten by each new call to |Simulate()| and you
consequently get to see only the results from the last run
(which is what you report).
*
If you set |overwrite_files| to |False|, and did not move the
file away, you will get an error upon repeated calls to
|Simulate()|, as the file to be created by the backend already
exists.
*
When using the recording backend |memory|
<https://nest-simulator.readthedocs.io/en/v3.1/models/recording_backend_memory.html>,
|overwrite_files| is not even considered, as that does not
actually write files.
*
Data just accumulates in the recording backend |memory| until
it is explicitly cleared by running |Input_SD.n_events = 0|.
See the linked backend documentation pages for more information.
I hope this helps to clear up things.
Cheers,
Jochen!
On 29.11.21 18:32, Maryada Maryada wrote:
--
Dr. Jochen Martin Eppler
Phone: +49(2461)61-96653
----------------------------------
Simulation Laboratory Neuroscience
Jülich Supercomputing Centre
Institute for Advanced Simulation
Dear NEST users,
I am trying to debug my network and I found that my
spike_recorder with /ascii/ option isn't working as expected.
I am simulating a network for a few milliseconds (say 1000. ms)
and then do some structure changes and then re-run for another
phase of a few ms (say 4000. ms)
In the compact version, I am trying to see how this sample code
would work.
import nest
nest.ResetKernel()
nest.SetKernelStatus({
"overwrite_files": True,
"data_path": './Debug-Log',
"data_prefix": 'DEBUG-SPIKE-REC',
})
noise_device = nest.Create("poisson_generator",params={'start':
0.,'rate' : 100.})
sd_params = {
"record_to": 'ascii',
"label": "Input_spike_recorder"
}
Input_SD = nest.Create("spike_recorder",1, params=sd_params)
nest.Connect(noise_device,Input_SD)
nest.Simulate(100.)
# do something here
nest.Simulate(100.)
*Issue:* I only get the data recorded from 100th millisecond but
for memory, I get all the data from 0-200 ms.
This behavior is consistent for both overwrite_files as True and
False.
In the previous version (v2.20) I also used the same approach and
had no issues. Is there a newer way to do such a simulation paradigm?
I didn't find anything on this on the comparison page of
NESTv2.x and NESTv3.x
Am I missing something? It's really important for my work, I hope
I could find a solution.
--
Thanks and Regards
*Maryada*
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--
Dr. Jochen Martin Eppler
Phone: +49(2461)61-96653
----------------------------------
Simulation Laboratory Neuroscience
Jülich Supercomputing Centre
Institute for Advanced Simulation
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52425 Juelich
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