Scicos Block
fr - eng

##
MATDET Matrix Determinant

### Contents

- MATDET Matrix Determinant
  - Palette
  - Description
  - Dialog box
  - Example
  - Default properties
  - Interfacing function
  - Computational function
  - See also
  - Authors

### Palette

- Matrix - Matrix operation palette

### Description

The MATDET outputs the determinant of a square input matrix. If the input A=[A11 A12 A13;A21 A22 A23;A31 A32 A33] then the output of the block has the form of: y=A11*(A22*A33-A23*A32)-A12*(A21*A33-A23*A31)+A13*(A21*A32-A22*A31).
The equivalent of MATDET in Scilab is "det"

### 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

    U=[1 0 63;2 -2 5;9 9 4]
    y=2215

### 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_det

### Interfacing function

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

### Computational function

- SCI/routines/scicos/mat_det.c [view code]
- SCI/routines/scicos/matz_det.c [view code]

### See also

- MATINV - MATINV Matrix Inverse (Scicos Block)

### Authors

Fady NASSIF INRIA