Using the update function JE_Special, input patterns will be generated dynamically. Let n be the number of input units and m the number of output units of the network. JE_Special generates the new input vector with the output of the last n-m input units and the outputs of the m output units. The usage of this update function requires n > m. The propagation of the newly generated pattern is done like using JE_Update. The number of the actual pattern in the control panel has no meaning for the input pattern when using JE_Special. This update function is used to determine the prediction capabilities of a trained network.