.. currentmodule:: brian

.. index::
   pair: example usage; NeuronGroup
   pair: example usage; run
   pair: example usage; Connection
   pair: example usage; PoissonGroup
   pair: example usage; SpikeMonitor
   pair: example usage; StateMonitor

.. _example-misc_poissongroup:

Example: poissongroup (misc)
============================

Poisson input to an IF model

::

    from brian import *
    
    PG = PoissonGroup(1, lambda t:200 * Hz * (1 + cos(2 * pi * t * 50 * Hz)))
    IF = NeuronGroup(1, model='dv/dt=-v/(10*ms) : volt', reset=0 * volt, threshold=10 * mV)
    
    C = Connection(PG, IF, 'v', weight=3 * mV)
    
    MS = SpikeMonitor(PG, True)
    Mv = StateMonitor(IF, 'v', record=True)
    rates = StateMonitor(PG, 'rate', record=True)
    
    run(100 * ms)
    
    subplot(211)
    plot(rates.times / ms, rates[0] / Hz)
    subplot(212)
    plot(Mv.times / ms, Mv[0] / mV)
    
    show()