.. currentmodule:: brian

.. index::
   pair: example usage; Equations
   pair: example usage; equations

.. _example-modelfitting_modelfitting_machines:

Example: modelfitting_machines (modelfitting)
=============================================

Model fitting example using several machines.
Before running this example, you must start the Playdoh server on the remote machines.

::

    from brian import loadtxt, ms, Equations
    from brian.library.modelfitting import *
    
    if __name__ == '__main__':
        # List of machines IP addresses
        machines = ['bobs-machine.university.com',
                    'jims-machine.university.com']
        
        equations = Equations('''
            dV/dt=(R*I-V)/tau : 1
            I : 1
            R : 1
            tau : second
        ''')
        input = loadtxt('current.txt')
        spikes = loadtxt('spikes.txt')
        results = modelfitting( model = equations,
                                reset = 0,
                                threshold = 1,
                                data = spikes,
                                input = input,
                                dt = .1*ms,
                                popsize = 1000,
                                maxiter = 3,
                                delta = 4*ms,
                                unit_type = 'CPU',
                                machines = machines,
                                R = [1.0e9, 9.0e9],
                                tau = [10*ms, 40*ms],
                                refractory = [0*ms, 10*ms])
        print_table(results)
    

