MATINV

Block Screenshot

Contents

• Description
• Parameters
• Default properties
• Examples
• Interfacing function
• Computational function
• See also

Description

The MATINV block outputs the inverse of a square input matrix calculated by using the LU factorization. A warning message is printed if the input is badly scaled or nearly singular.

The equivalent function of this block in Scilab is inv.

Parameters

• 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.

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_inv

Matrix Inverse example: inv([0 1/(sin(t)+1) ; 1/(t+1) 0])

Interfacing function

• SCI/modules/scicos_blocks/macros/MatrixOp/MATINV.sci

Computational function

• SCI/modules/scicos_blocks/src/c/mat_inv.c
• SCI/modules/scicos_blocks/src/c/matz_inv.c

See also

• MATLU — LU Factorization
• MATPINV — Matrix PseudoInverse
• inv — 逆行列