SIGM

Sigmoid map

    W = W*SIGM
    B = A*SIGM
    W = W*SIGM([],SCALE)
    B = SIGM(A,SCALE)

Input
A	Dataset (optional)
SCALE	Scaling parameter (optional, default: 1)

Output
W	Sigmoid mapping, or
B	Dataset A mapped by sigmoid mapping

Description

Sigmoidal transformation, useful to transform a map to classifier,  producing posterior probability estimates. The parameter SCALE scales the  data first (A/SCALE), before the transformation. Default: SCALE = 1, i.e.  no scaling.

See also

datasets, mappings, classc,