Scicos Block
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MATLU LU Factorization

Contents

• MATLU LU Factorization
  • Palette
  • Description
  • Dialog box
  • Default properties
  • Interfacing function
  • Computational function
  • See also
  • Authors

Palette

• Matrix - Matrix operation palette

Description

The MATLU Block outputs two matrices L and U, with row pivoting, from the LU factorization of a square input matrix. If A is the input matrix then E*A=L*U where E is a permutation matrix. The equivalent function of this block in Scilab is "[l,u,e]=lu(A)"

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.

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
  - port 2 : 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_lu

Interfacing function

• SCI/macros/scicos_blocks/MatrixOp/MATLU.sci [view code]

Computational function

• SCI/routines/scicos/matz_lu.c [view code]

See also

• MATINV - MATINV Matrix Inverse (Scicos Block)

Authors

Fady NASSIF INRIA