# Command: testsuite::test_iaf_dc_aligned_delay

NEST HelpDesk | Command Index | NEST Quick Reference

Name:

    testsuite::test_iaf_dc_aligned_delay - sli script for test of iaf_neuron resolution independence

Synopsis:

    (test_iaf_dc_aligned_delay) run -> compare response with reference data

Description:

      test_iaf_dc_aligned_delay.sli is a modified version of
      test_iaf_dc_aligned. The output generated by the former is exactly
      identical to the output of the latter. However, the  dependence of the
      simulation script on the computation step size is fully removed by
      replacing the default value of the delay between DC generator and
      neuron by a value specified in ms and larger than the largest
      computation step size to be used in the simulation. Note that the
      specification of the delay is now independent of the computation step
      size.

      In addition, variables are introduced to clarify the meaning of
      of various time measures and a few relationships are tested.

      The expected output is documented and briefly commented at the end of
      the script.

      The intention of this script is that the current starts to affect the
      neuron (is present from) at time t=3ms (dc_visible). With a delay of
      1ms (dc_delay), the time stamp of the emitted current event (dc_on)
      needs to be dc_visible	- dc_delay. Thus, according to the definitions
      of the timing scheme, the emission time of the DC generator (start)
      needs to be dc_visible	- dc_delay.

Remarks:

      In earlier versions, the file

      test_iaf_dc_aligned_automatic.sli

      contained a further improved version of this script. Here, /start
      specified the activation time t of the device not the time stamp t+h
      of the first event that can be emitted. An additional property /on
      was required to make the SLI code independent of the resolution. The
      device carried out the transformation start = on	- h (see also
      test_iaf_dc_aligned.sli).  Now the code in
      test_iaf_dc_aligned_automatic.sli is identical to the code in this
      file.

      Author:  February 2004, Diesmann, Gewaltig, Plesser

SeeAlso:

- testsuite::test_iaf_dc
- testsuite::test_iaf_dc_aligned
- testsuite::test_iaf_dc_aligned_automatic

Source:

    /opt/conda/conda-bld/nest_1524088722951/work/nest-2.14.0/testsuite/unittests/test_iaf_dc_aligned_delay.sli

NEST HelpDesk | Command Index | NEST Quick Reference

© 2004 The NEST Initiative