Backpropagation model

To execute this model, the user must

• On the archive backprop.nsl on C:\models3.0\backprop,using a texteditor(I.E. notepad) delete the last lines:

      nsl init 

      nsl train 

      nsl load backproprun.

      And save the changes.

• After loading the NSL executive window, locate the directory in which the model is located (I.E. c:\model 3.0\backprop\)
• Type source backprop.nsl

• To initialize the execution of the model: nsl init
•  To run the simulation: nsl train

While the model is working the following screen should appear:

• To show the results of the simulation: nsl load backproprun.

The final result screen:

• Once the final screen appears, the user can exit the nsl executive by typing exit

Assigning input

The inputs for the model must be typed as in the following example:

Note these are the default values the model has for the specified parameters.

set steps 800

set numPats 4

set graphTime [expr $steps*$numPats]

nsl set system.trainEpochSteps $steps ;# -1

nsl set system.trainDelta 1

nsl set system.trainEndTime $numPats

nsl set system.simDelta .25

nsl set system.simEndTime .5

nsl set BackPropModel.tf.pInput {

{ 0 0 } { 0 1 } { 1 0 } { 1 1 } }

nsl set BackPropModel.tf.pOutput {

{ 0 } { 1 } { 1 } { 0 } }

#nsl set BackPropModel.tf.pInput \

#0 0 0 1 1 0 1 1

#nsl set BackPropModel.tf.pOutput \

#0 1 1 0

nsl set BackPropModel.bp.bh.lrate 0.8 ;# 0.3 , 0.15

nsl set BackPropModel.bp.bo.lrate 0.8 ;# 0.3 , 0.15

nsl set BackPropModel.bp.be.stopError 0.05