Scicos Block
fr - eng

##
Delay operator

### Contents

- Delay operator
  - Palette
  - Description
  - Dialog box
  - Default properties
  - Interfacing function
  - Computational function
  - Authors

### Palette

- Linear - Linear palette

### Description

The Unit Delay block delays its input by the specified sample period. This block is equivalent to the z-1 discrete-time operator. The block accepts one input and generates one output, which can be either both scalar or both vector. If the input is a vector, all elements of the vector are delayed by the same sample period.
This block can support all data types supported by Scicos. The output will inherit its datatype from the "initial condition".

### Dialog box

- initial condition
  The output of the simulation for the first sampling period, during which the output of the Unit Delay block is otherwise undefined.
  Properties : Type 'mat' of size [-1,-2].

- Inherit (no:0, yes:1)
  When "Inherit" is yes, the block inherit its event input.
  Properties : Type 'vec' of size -1.

### Default properties

- always active: no
- direct-feedthrough: no
- zero-crossing: no
- mode: no
- regular inputs:
  - port 1 : size [1,1] / type 1
- regular outputs:
  - port 1 : size [1,1] / type 1
- number/sizes of activation inputs: 1
- number/sizes of activation outputs: 0
- continuous-time state: no
- discrete-time state: yes
- object discrete-time state: no
- name of computational function: dollar4

### Interfacing function

- SCI/macros/scicos_blocks/Linear/DOLLAR_m.sci [view code]

### Computational function

- SCI/routines/scicos/dollar4.c (Type 4) [view code]

### Authors

Fady NASSIF INRIA