The Complete SPRLIB & ANNLIB

samann_der_sigmoid

- a local version of the derivative of the sigmoid transfer function (LOCAL)

SYNOPSIS

double samann_der_sigmoid (unit, pass)

ARGUMENTS

UNIT *unit The unit for which the output derivative is to be calculated.
int pass The number of the activation to take (1 or 2).

RETURNS

The first derivative of the sigmoid transfer function for the activation for sample pass.

FUNCTION

This is a local version of the derivative of the sigmoid transfer function (see TransSigmoid) which is adapted for handling two activations per unit. The transfer function is calculated using activation pass (see SAMANN_STRUCT).

SEE ALSO

samann_sigmoid, samann_adapt_unit

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