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Manuel Scilab >> xcos > palettes > Matrix operation palette > MATDIAG

MATDIAG

Create Diagonal Matrix

Block Screenshot

Description

The MATDIAG block create a diagonal matrix from a 1D vector. If the input is a M-by-1 vector than 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 xcos 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/modules/scicos_blocks/macros/MatrixOp/MATDIAG.sci

Computational function

  • SCI/modules/scicos_blocks/src/c/mat_diag.c

  • SCI/modules/scicos_blocks/src/c/matz_diag.c

Authors

Fady NASSIF - INRIA

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Copyright (c) 2011-2017 (Scilab Enterprises)
Copyright (c) 1989-2012 (INRIA)
Copyright (c) 1989-2007 (ENPC)
with contributors
Last updated:
Wed Jan 26 16:24:17 CET 2011