sigmoid: Sigmoid activation functon

In gumeo/mnistr: Utility Functions for MNIST Dataset

Description

sigmoid can take a scalar, vector or matrix and output elementwise application of the sigmoid nonlinearity/ squashing function. There is an additional boolean flag for calculating the derivative. The deriv argument is needed for activation functions.

Usage

sigmoid(X, deriv = FALSE)

Arguments

X	numeric scalar, vector or matrix
deriv	boolean indicating whether we should evaluate the function or the derivative at the input.

Value

Same format as the input X.

Examples

sigmoid(-5)
sigmoid(0)
sigmoid(5)
sigmoid(0,deriv=TRUE)

gumeo/mnistr documentation built on May 17, 2019, 9:27 a.m.