Neural Network Toolbox

tribas

Triangular basis transfer function

Graph and Symbol

Syntax

A = tribas(N)

info = tribas(code)

Description

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

tribas(N) takes one input,

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

and returns each element of N passed through a radial basis function.

tribas(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 we create a plot of the tribas transfer function.

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

Network Use

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

Call sim to simulate the network with tribas.

Algorithm

tribas(N) calculates its output with according to:

• tribas(n) = 1-abs(n), if -1 <= n <= 1; = 0, otherwise.

See Also

sim, radbas

trastd

vec2ind

© 1994-2005 The MathWorks, Inc.