This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English verison of the page.

Note: This page has been translated by MathWorks. Please click here
To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.


Positive linear transfer function

Graph and Symbol


A = poslin(N,FP)
info = poslin('code')


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

A = poslin(N,FP) takes N and optional function parameters,


S-by-Q matrix of net input (column) vectors


Struct of function parameters (ignored)

and returns A, the S-by-Q matrix of N’s elements clipped to [0, inf].

info = poslin('code') returns information about this function. The following codes are supported:

poslin('name') returns the name of this function.

poslin('output',FP) returns the [min max] output range.

poslin('active',FP) returns the [min max] active range.

poslin('fullderiv') returns 1 or 0, depending on whether dA_dN is S-by-S-by-Q or S-by-Q.

poslin('fpnames') returns the names of the function parameters.

poslin('fpdefaults') returns the default function parameters.


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

n = -5:0.1:5;
a = poslin(n);

Assign this transfer function to layer i of a network.

net.layers{i}.transferFcn = 'poslin';

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.


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

| | |

Introduced before R2006a

Was this topic helpful?