# Command: mip_generator

NEST HelpDesk | Command Index | NEST Quick Reference

Name:

    mip_generator - create spike trains as described by the MIP model.

Description:

      The mip_generator generates correlated spike trains using an Multiple
      Interaction Process (MIP) as described in [1]. Underlying principle is a
      Poisson mother process with rate r, the spikes of which are copied into the
      child processes with a certain probability p. Every node the mip_generator is
      connected to receives a distinct child process as input, whose rate is p*r.
      The value of the pairwise correlation coefficient of two child processes
      created by a MIP process equals p.

Parameters:

      The following parameters appear in the element's status dictionary:

      rate	 double	- Mean firing rate of the mother process in Hz
      p_copy	 double	- Copy probability
      mother_rng   rng  	- Random number generator of mother process
      mother_seed  long  	- Seed of RNG of mother process

Sends:

    SpikeEvent

Remarks:

      The MIP generator may emit more than one spike through a child process
      during a single time step, especially at high rates.  If this happens,
      the generator does not actually send out n spikes.  Instead, it emits
      a single spike with n-fold synaptic weight for the sake of efficiency.
      Furthermore, note that as with the Poisson generator, different threads
      have their own copy of a MIP generator. By using the same mother_seed
      it is ensured that the mother process is identical for each of the
      generators.

      IMPORTANT: The mother_seed of mpi_generator must be different from any
      seeds used for the global or thread-specific RNGs set in
      the kernel.

References:

      [1] Alexandre Kuhn, Ad Aertsen, Stefan Rotter
      Higher-Order Statistics of Input Ensembles and the Response of Simple
      Model Neurons
      Neural Computation 15, 67-101 (2003)

Author:

    May 2006, Helias

SeeAlso:

- Device

Source:

    /opt/conda/conda-bld/nest_1531570948828/work/models/mip_generator.h

NEST HelpDesk | Command Index | NEST Quick Reference

© 2004 The NEST Initiative