.. currentmodule:: brian

.. index::
   pair: example usage; raster_plot
   pair: example usage; NeuronGroup
   pair: example usage; Connection
   pair: example usage; run
   pair: example usage; SpikeMonitor

.. _example-misc_ring:

Example: ring (misc)
====================

A ring of integrate-and-fire neurons.

::

    from brian import *
    
    tau = 10 * ms
    v0 = 11 * mV
    N = 20
    w = 1 * mV
    
    ring = NeuronGroup(N, model='dv/dt=(v0-v)/tau : volt', threshold=10 * mV, reset=0 * mV)
    
    W = Connection(ring, ring, 'v')
    for i in range(N):
        W[i, (i + 1) % N] = w
    
    ring.v = rand(N) * 10 * mV
    
    S = SpikeMonitor(ring)
    
    run(300 * ms)
    
    raster_plot(S)
    show()