Injecting currentΒΆ
Current waveforms are represented in PyNN by CurrentSource
classes.
There are four built-in source types, and it is straightforward to
implement your own.
There are two ways to inject a current waveform into the cells of a
Population
, PopulationView
or Assembly
: either the
inject_into()
method of the CurrentSource
or the
inject()
method of the Population
, Assembly
, etc.
>>> pulse = DCSource(amplitude=0.5, start=20.0, stop=80.0)
>>> pulse.inject_into(population[3:7])
>>> sine = ACSource(start=50.0, stop=450.0, amplitude=1.0, offset=1.0,
... frequency=10.0, phase=180.0)
>>> population.inject(sine)
>>> steps = StepCurrentSource(times=[50.0, 110.0, 150.0, 210.0],
... amplitudes=[0.4, 0.6, -0.2, 0.2])
>>> steps.inject_into(population[(6,11,27)])
>>> noise = NoisyCurrentSource(mean=1.5, stdev=1.0, start=50.0, stop=450.0, dt=1.0)
>>> population.inject(noise)
For a full description of all the built-in current source classes, see the API reference.
Todo
write “implementing-your-own-current-source” (e.g., implement “chirp”)