Scicos Block
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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 creates a diagonal matrix from a 1D vector. If the input is an M-by-1 vector then 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/matz_diag.c [view code]

See also

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

Authors

Fady NASSIF INRIA