MATDET

Matrix Determinant

Block Screenshot

Contents

• `Matrix Determinant`_ +

  • Palette
  • Description
  • Dialog box
  • Example
  • Default properties
  • Interfacing function
  • Computational function
  • See also

Palette

• Matrix operation palette

Description

The MATDET outputs the determinant of a square input matrix. If the input is:

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 function 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 xcos 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/modules/scicos_blocks/macros/MatrixOp/MATDET.sci

Computational function

• SCI/modules/scicos_blocks/src/c/mat_det.c
• SCI/modules/scicos_blocks/src/c/matz_det.c

See also

• MATINV - Matrix Inverse (xcos Block)
• det (Scilab function)