Last modified by adavison on 2022/10/04 13:55

From version 12.1
edited by adavison
on 2021/09/30 14:21
Change comment: There is no comment for this version
To version 14.1
edited by adavison
on 2021/09/30 15:27
Change comment: There is no comment for this version

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... ... @@ -334,43 +334,96 @@
334 334  population2.set(i_offset=0)
335 335  population1.record("v")
336 336  population2.record("v")(%%)
337 -(% style="color:#e74c3c" %)connection_algorithm = sim.FixedProbabilityConnector(p=0.5)
337 +(% style="color:#000000" %)connection_algorithm = sim.FixedProbabilityConnector(p=0.5)
338 338  synapse_type = sim.StaticSynapse(weight=0.5, delay=0.5)
339 339  connections = sim.Projection(population1, population2, connection_algorithm, synapse_type)(%%)
340 340  (% style="color:#000000" %)sim.run(100.0)(%%)
341 -(% style="color:#000000" %)data1_v = population1.get_data().segments[0].filter(name='v')[0]
342 -data2_v = population1.get_data().segments[0].filter(name='v')[0]
343 -Figure(
341 +(% style="color:#e74c3c" %)data1_v(% style="color:#000000" %) = population1.get_data().segments[0].filter(name='v')[0](%%)
342 +(% style="color:#e74c3c" %)data2_v = population2.get_data().segments[0].filter(name='v')[0](%%)
343 +(% style="color:#000000" %)Figure(
344 344   Panel(
345 - data_v[:, 0:5],
346 - xticks=True, xlabel="Time (ms)",
347 - yticks=True, ylabel="Membrane potential (mV)"
345 + (% style="color:#e74c3c" %)data1_v(% style="color:#000000" %)[:, 0:5],
346 + xticks=True, (% style="color:#e74c3c" %)--xlabel="Time (ms)",--(%%)
347 +(% style="color:#000000" %) yticks=True, ylabel="Membrane potential (mV)"
348 348   ),
349 + (% style="color:#e74c3c" %)Panel(
350 + data2_v[:, 0:5],
351 + xticks=True, xlabel="Time (ms)",
352 + yticks=True"
353 + ),(%%)
354 +(% style="color:#000000" %) title="Response of (% style="color:#e74c3c" %)simple network(% style="color:#000000" %)",
355 + annotations="Simulated with NEST"
356 +).show()
349 349  
358 +**Run script in terminal, show figure**
359 +)))
350 350  
351 -(% style="color:#000000" %) title="Response of first five neurons with heterogeneous parameters",
352 - annotations="Simulated with NEST"
361 +(% class="wikigeneratedid" %)
362 +and there we have it, our simple neuronal network of integrate-and-fire neurons, written in PyNN, simulated with NEST. If you prefer to use the NEURON simulator, PyNN makes this very simple, we import the PyNN-for-NEURON module instead.
363 +
364 +(% class="box infomessage" %)
365 +(((
366 +**Screencast** - current state of editor
367 +\\(% style="color:#000000" %)"""Simple network model using PyNN"""
368 +\\import pyNN.(% style="color:#e74c3c" %)neuron(% style="color:#000000" %) as sim(%%)
369 +(% style="color:#000000" %)from pyNN.utility.plotting import Figure, Panel(%%)
370 +(% style="color:#000000" %)from pyNN.random import RandomDistribution(%%)
371 +(% style="color:#000000" %)sim.setup(timestep=0.1)(%%)
372 +(% style="color:#000000" %)cell_type  = sim.IF_curr_exp(
373 + (% style="color:#e74c3c" %) (% style="color:#000000" %)v_rest=RandomDistribution('normal', {'mu': -65.0, 'sigma': 1.0}),
374 + v_thresh=RandomDistribution('normal', {'mu': -55.0, 'sigma': 1.0}),
375 + v_reset=RandomDistribution('normal', {'mu': -65.0, 'sigma': 1.0}), (%%)
376 +(% style="color:#000000" %) t_refrac=1, tau_m=10, cm=1, i_offset=0.1)(%%)
377 +(% style="color:#000000" %)population1 = sim.Population(100, cell_type, label="Population 1")(%%)
378 +(% style="color:#000000" %)population2 = sim.Population(100, cell_type, label="Population 2")
379 +population2.set(i_offset=0)
380 +population1.record("v")
381 +population2.record("v")(%%)
382 +(% style="color:#000000" %)connection_algorithm = sim.FixedProbabilityConnector(p=0.5)
383 +synapse_type = sim.StaticSynapse(weight=0.5, delay=0.5)
384 +connections = sim.Projection(population1, population2, connection_algorithm, synapse_type)(%%)
385 +(% style="color:#000000" %)sim.run(100.0)(%%)
386 +(% style="color:#000000" %)data1_v = population1.get_data().segments[0].filter(name='v')[0]
387 +data2_v = population2.get_data().segments[0].filter(name='v')[0]
388 +Figure(
389 + Panel(
390 + data1_v[:, 0:5],
391 + xticks=True,
392 + yticks=True, ylabel="Membrane potential (mV)"
393 + ),
394 + Panel(
395 + data2_v[:, 0:5],
396 + xticks=True, xlabel="Time (ms)",
397 + yticks=True"
398 + ),(%%)
399 +(% style="color:#000000" %) title="Response of simple network",
400 + annotations="Simulated with (% style="color:#e74c3c" %)NEURON(% style="color:#000000" %)"
353 353  ).show()
354 354  
355 355  **Run script in terminal, show figure**
356 356  )))
357 357  
358 -(% class="wikigeneratedid" id="HSummary28Inthistutorial2CyouhavelearnedtodoX202629" %)
359 -(% class="small" %)**Summary (In this tutorial, you have learned to do X…)**
406 +(% class="wikigeneratedid" %)
407 +As you would hope, NEST and NEURON give essentially identical results.
360 360  
361 -.
409 +(% class="box successmessage" %)
410 +(((
411 +**Slide** recap of learning objectives
412 +)))
362 362  
363 -(% class="wikigeneratedid" id="HAcknowledgementsifappropriate" %)
364 -(% class="small" %)**Acknowledgements if appropriate**
414 +That is the end of this tutorial, in which I've demonstrated how to build a simple network using PyNN, and to simulate it using two different simulators, NEST and NEURON.
365 365  
366 -.
416 +Of course, PyNN allows you to create much more complex networks than this, with more realistic neuron models, synaptic plasticity, spatial structure, and so on. You can also use other simulators, such as Brian or SpiNNaker, and you can run simulations in parallel on clusters or supercomputers.
367 367  
368 -(% class="wikigeneratedid" id="HReferencestowebsites28Formoreinformation2Cvisitusat202629" %)
369 -(% class="small" %)**References to websites (For more information, visit us at…)**
418 +We will be releasing a series of tutorials, throughout the rest of 2021 and 2022, to introduce these more advanced features of PyNN, so keep an eye on the EBRAINS website.
370 370  
371 -.
420 +(% class="box successmessage" %)
421 +(((
422 +**Slide** acknowledgements, contact information
423 +)))
372 372  
373 -(% class="wikigeneratedid" id="HContactinformation28Forquestions2Ccontactusat202629" %)
374 -(% class="small" %)**Contact information (For questions, contact us at…)**
425 +(% class="wikigeneratedid" %)
426 +PyNN has been developed by many different people, with financial support from several different organisations. I'd like to mention in particular the CNRS and the European Commission, through the FACETS, BrainScaleS and Human Brain Project grants.
375 375  
376 -.
428 +(% class="wikigeneratedid" %)
429 +For more information visit neuralensemble.org/PyNN. If you have questions you can contact us through the PyNN Github project, the NeuralEnsemble forum, EBRAINS support, or the EBRAINS Community.