Scicos Block
fr - eng

##
MATDIAG Create Diagonal Matrix

### Contents

- MATDIAG Create Diagonal Matrix
  - Palette
  - Description
  - Dialog box
  - Example
  - Default properties
  - Interfacing function
  - Computational function
  - See also
  - Authors

### Palette

- Matrix - Matrix operation palette

### Description

The MATDIAG block create a diagonal matrix from a 1D vector. If the input is a M-by-1 vector than the output is an M-by-M matrix.

### Dialog box

- Datatype (1=real double 2=Complex)
  It indicates the type of the output. It support only the two types double (1) and complex (2). If we input another entry in this label Scicos will print the message "Datatype is not supported".
  Properties : Type 'vec' of size 1.

### Example

    if the input of the block is U=ones(5,1) then the output is:
    y=[1 0 0 0 0;0 1 0 0 0;0 0 1 0 0;0 0 0 1 0;0 0 0 0 1]

### Default properties

- always active: no
- direct-feedthrough: yes
- 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: 0
- number/sizes of activation outputs: 0
- continuous-time state: no
- discrete-time state: no
- object discrete-time state: no
- name of computational function: mat_diag

### Interfacing function

- SCI/macros/scicos_blocks/MatrixOp/MATDIAG.sci [view code]

### Computational function

- SCI/routines/scicos/mat_diag.c [view code]
- SCI/routines/scicos/matz_diag.c [view code]

### See also

- EXTTRI - EXTTRI: Triangular or Diagonal extraction (Scicos Block)

### Authors

Fady NASSIF INRIA