.. currentmodule:: brian

.. index::
   pair: example usage; NeuronGroup
   pair: example usage; run
   pair: example usage; Synapses
   pair: example usage; StateMonitor

.. _example-synapses_one_synapse_bis:

Example: one_synapse_bis (synapses)
===================================

One synapse within several possibilities.
Synapse from 2->3.

::

    from brian import *
    
    P=NeuronGroup(5,model='dv/dt=1/(10*ms):1',threshold=1,reset=0)
    Q=NeuronGroup(4,model='v:1')
    S=Synapses(P,Q,model='w:1',pre='v+=w')
    M=StateMonitor(Q,'v',record=True)
    
    S[2,3]=True
    S.w[2,3]=1.
    S.delay[2,3]=.5*ms
    
    run(40*ms)
    
    for i in range(4):
        plot(M.times/ms,M[i]+i*2,'k')
    show()