Neural Network Toolbox

poslin

Positive linear transfer function

Graph and Symbol

Syntax

A = poslin(N)

info = poslin(code)

Description

poslin is a transfer function. Transfer functions calculate a layer's output from its net input.

poslin(N) takes one input,

• N - S x Q matrix of net input (column) vectors.

and returns the maximum of 0 and each element of N.

poslin(code) returns useful information for each code string:

• 'deriv' - Name of derivative function.

  'name' - Full name.

  'output' - Output range.

  'active' - Active input range.

Examples

Here is the code to create a plot of the poslin transfer function.

• n = -5:0.1:5;
  a = poslin(n);
  plot(n,a)
  

Network Use

To change a network so that a layer uses poslin, set net.layers{i}.transferFcn to 'poslin'.

Call sim to simulate the network with poslin.

Algorithm

The transfer function poslin returns the output n if n is greater than or equal to zero and 0 if n is less than or equal to zero.

poslin(n) = n, if n >= 0; = 0, if n <= 0.

See Also

sim, purelin, satlin, satlins

pnormc

postmnmx