Log

It realizes : y(i)=log(u(i))/log(a).

    Log

Library

Activate/MathOperations

Description

The Log block computes the logarithm of the elements of the input vector.

The Basis is defined by the user, the default block parameters results in evaluatuing the natural logarithm.

Parameters

Log_0

NameLabelDescriptionData TypeValid Values

base

Basis (>1)

Basis of the logarithm. Real value greater than 1, defaults to Exp(1).

Scalar

externalActivation

External activation

Specifies whether the block receives an external activation or inherits its activation through its regular input ports. When External Activation is selected, an additional activation port is added to the block. By default, external activation is not selected.

Number

0
1

Ports

NameTypeDescriptionIO TypeNumber

Port 1

explicit

output

1

Port 2

explicit

input

1

Port 3

activation

input

externalActivation

Advanced Properties

NameValueDescription

always active

no

direct-feedthrough

yes

zero-crossing

no

mode

no

continuous-time state

no

discrete-time state

no