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A Small Usage Example
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Below follows a script for simulating simple instrumental training, where the subject learns to respond to a single stimulus.
For additional scripts, please see the `script database <https://www.learningsimulator.org/script-database>`_ on the
`Learning Simulator Project website <http://learningsimulator.org/>`_.

::

  n_subjects        = 10
  mechanism         = sr
  behaviors         = response, no_response
  stimulus_elements = background, stimulus, reward
  start_v           = -1
  alpha_v           = 0.1
  u                 = reward:10, default:0

  @PHASE training stop: stimulus==50
  START_TRIAL stimulus   | response: REWARD | NO_REWARD
  REWARD      reward     | START_TRIAL
  NO_REWARD   background | START_TRIAL

  @run training

  xscale: stimulus
  @figure v(stimulus->response)
  @subplot 111 {'xlabel':'exposures to stimulus', 'ylabel':'v-value'}
  @vplot stimulus->response

Running this script should result in a figure similar to the one below, where we see that the value of
responding to the stimulus starts at -1 (as specified in the parameter ``start_v``) and tends to 10 (the u-value for the reward, as specified in the parameter ``u``).

.. image:: usage-example-fig.png
  :scale: 90
..   :height: 500
   :width: 1000
   
   :alt: @vplot stimulus->response